Brentwood City Council
May 26, 2026

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-460-022 $175.48
019-460-023 $175.48
019-460-024 $175.48
019-460-025 $175.48
019-460-026 $175.48
019-460-027 $175.48
019-460-028 $175.48
019-460-029 $175.48
019-460-030 $175.48
019-460-031 $175.48
019-470-001 $175.48
019-470-002 $175.48
019-470-003 $175.48
019-470-004 $175.48
019-470-005 $175.48
019-470-006 $175.48
019-470-007 $175.48
019-470-008 $175.48
019-470-009 $175.48
019-470-010 $175.48
019-470-011 $175.48
019-470-012 $175.48
019-470-013 $175.48
019-470-014 $175.48
019-470-015 $175.48
019-470-016 $175.48
019-470-017 $175.48
019-470-018 $175.48
019-470-019 $175.48
019-470-020 $175.48
019-480-001 $175.48
019-480-002 $175.48
019-480-003 $175.48
019-480-004 $175.48
019-480-005 $175.48
019-480-006 $175.48
019-480-007 $175.48
019-480-008 $175.48
019-480-009 $175.48
019-480-010 $175.48
019-480-011 $175.48
019-480-012 $175.48
019-480-013 $175.48
019-480-014 $175.48
019-480-015 $175.48
019-480-016 $175.48
019-480-017 $175.48
019-480-018 $175.48
019-480-019 $175.48
019-480-020 $175.48
019-480-021 $175.48
019-480-022 $175.48
019-480-023 $175.48
019-480-024 $175.48
019-480-025 $175.48
019-480-026 $175.48
019-480-027 $175.48
019-480-028 $175.48
019-480-029 $175.48
019-480-030 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-480-031 $175.48
019-480-032 $175.48
019-480-033 $175.48
019-480-034 $175.48
019-480-035 $175.48
019-480-036 $175.48
019-480-037 $175.48
019-480-038 $175.48
019-480-039 $175.48
019-480-040 $175.48
019-480-041 $175.48
019-480-042 $175.48
019-480-043 $175.48
019-480-044 $175.48
019-480-045 $175.48
019-480-046 $175.48
019-480-047 $175.48
019-490-001 $175.48
019-490-002 $175.48
019-490-003 $175.48
019-490-004 $175.48
019-490-005 $175.48
019-490-006 $175.48
019-490-007 $175.48
019-490-008 $175.48
019-490-009 $175.48
019-490-010 $175.48
019-490-011 $175.48
019-490-012 $175.48
019-490-013 $175.48
019-490-014 $175.48
019-490-015 $175.48
019-490-016 $175.48
019-490-017 $175.48
019-490-018 $175.48
019-490-019 $175.48
019-490-020 $175.48
019-490-021 $175.48
019-490-022 $175.48
019-490-023 $175.48
019-490-024 $175.48
019-490-025 $175.48
019-490-026 $175.48
019-490-027 $175.48
019-490-028 $175.48
019-490-029 $175.48
019-490-030 $175.48
019-490-031 $175.48
019-490-032 $175.48
019-490-033 $175.48
019-490-034 $175.48
019-490-035 $175.48
019-490-036 $175.48
019-490-037 $175.48
019-490-038 $175.48
019-490-039 $175.48
019-490-040 $175.48
019-490-041 $175.48
019-490-042 $175.48
019-490-043 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-490-044 $175.48
019-490-045 $175.48
019-490-046 $175.48
019-490-047 $175.48
019-490-048 $175.48
019-490-049 $175.48
019-490-050 $175.48
019-490-051 $175.48
019-490-052 $175.48
019-490-053 $175.48
019-490-054 $175.48
019-500-001 $175.48
019-500-002 $175.48
019-500-003 $175.48
019-500-004 $175.48
019-500-005 $175.48
019-500-006 $175.48
019-500-007 $175.48
019-500-008 $175.48
019-500-009 $175.48
019-500-010 $175.48
019-500-011 $175.48
019-500-012 $175.48
019-500-013 $175.48
019-500-014 $175.48
019-500-015 $175.48
019-500-016 $175.48
019-500-017 $175.48
019-500-018 $175.48
019-500-019 $175.48
019-500-020 $175.48
019-500-021 $175.48
019-500-022 $175.48
019-500-023 $175.48
019-500-024 $175.48
019-500-025 $175.48
019-500-026 $175.48
019-500-027 $175.48
019-500-028 $175.48
019-500-029 $175.48
019-500-030 $175.48
019-500-031 $175.48
019-500-032 $175.48
019-500-033 $175.48
019-500-034 $175.48
019-500-035 $175.48
019-500-036 $175.48
019-500-037 $175.48
019-500-038 $175.48
019-500-039 $175.48
019-500-040 $175.48
019-500-041 $175.48
019-500-042 $175.48
019-500-043 $175.48
019-500-044 $175.48
019-500-045 $175.48
019-500-046 $175.48
019-500-047 $175.48
019-500-048 $175.48
019-500-049 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-500-050 $175.48
019-500-051 $175.48
019-500-052 $175.48
019-500-053 $175.48
019-500-054 $175.48
019-500-055 $175.48
019-500-056 $175.48
019-500-057 $175.48
019-500-058 $175.48
019-500-059 $175.48
019-500-060 $175.48
019-500-061 $175.48
019-500-062 $175.48
019-500-063 $175.48
019-500-064 $175.48
019-500-065 $175.48
019-500-066 $175.48
019-500-067 $175.48
019-500-068 $175.48
019-500-069 $175.48
019-500-070 $175.48
019-500-071 $175.48
019-500-072 $175.48
019-500-073 $175.48
019-510-001 $175.48
019-510-002 $175.48
019-510-003 $175.48
019-510-004 $175.48
019-510-005 $175.48
019-510-006 $175.48
019-510-007 $175.48
019-510-008 $175.48
019-510-009 $175.48
019-510-010 $175.48
019-510-011 $175.48
019-510-012 $175.48
019-510-013 $175.48
019-510-014 $175.48
019-510-015 $175.48
019-510-016 $175.48
019-510-017 $175.48
019-510-018 $175.48
019-510-019 $175.48
019-510-020 $175.48
019-510-021 $175.48
019-510-022 $175.48
019-510-023 $175.48
019-510-024 $175.48
019-510-025 $175.48
019-510-026 $175.48
019-510-027 $175.48
019-510-028 $175.48
019-510-029 $175.48
019-510-030 $175.48
019-510-031 $175.48
019-510-032 $175.48
019-510-033 $175.48
019-510-034 $175.48
019-510-035 $175.48
019-520-001 $175.48
- 81 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-520-002 $175.48
019-520-003 $175.48
019-520-004 $175.48
019-520-005 $175.48
019-520-006 $175.48
019-520-007 $175.48
019-520-008 $175.48
019-520-009 $175.48
019-520-010 $175.48
019-520-011 $175.48
019-520-012 $175.48
019-520-013 $175.48
019-520-014 $175.48
019-520-015 $175.48
019-520-016 $175.48
019-520-017 $175.48
019-520-018 $175.48
019-520-019 $175.48
019-520-020 $175.48
019-520-021 $175.48
019-520-022 $175.48
019-520-023 $175.48
019-520-024 $175.48
019-520-025 $175.48
019-520-026 $175.48
019-520-027 $175.48
019-520-028 $175.48
019-520-029 $175.48
019-520-030 $175.48
019-520-031 $175.48
019-520-032 $175.48
019-520-033 $175.48
019-520-034 $175.48
019-520-035 $175.48
019-520-036 $175.48
019-520-037 $175.48
019-520-038 $175.48
019-520-039 $175.48
019-520-040 $175.48
019-520-041 $175.48
019-520-042 $175.48
019-520-043 $175.48
019-520-044 $175.48
019-520-045 $175.48
019-520-046 $175.48
019-520-047 $175.48
019-520-048 $175.48
019-520-049 $175.48
019-520-050 $175.48
019-520-051 $175.48
019-520-052 $175.48
019-520-053 $175.48
019-520-054 $175.48
019-520-055 $175.48
019-520-056 $175.48
019-520-057 $175.48
019-520-058 $175.48
019-520-059 $175.48
019-520-060 $175.48
019-520-061 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-520-062 $175.48
019-520-063 $175.48
019-520-064 $175.48
019-520-065 $175.48
019-520-066 $175.48
019-520-067 $175.48
019-530-001 $175.48
019-530-002 $175.48
019-530-003 $175.48
019-530-004 $175.48
019-530-005 $175.48
019-530-006 $175.48
019-530-007 $175.48
019-530-008 $175.48
019-530-009 $175.48
019-530-010 $175.48
019-530-011 $175.48
019-530-012 $175.48
019-530-013 $175.48
019-530-014 $175.48
019-530-015 $175.48
019-530-016 $175.48
019-530-017 $175.48
019-530-018 $175.48
019-530-019 $175.48
019-530-020 $175.48
019-530-021 $175.48
019-530-022 $175.48
019-530-023 $175.48
019-530-024 $175.48
019-530-025 $175.48
019-530-026 $175.48
019-530-027 $175.48
019-530-028 $175.48
019-530-029 $175.48
019-530-030 $175.48
019-530-031 $175.48
019-530-032 $175.48
019-540-001 $175.48
019-540-002 $175.48
019-540-003 $175.48
019-540-004 $175.48
019-540-005 $175.48
019-540-006 $175.48
019-540-007 $175.48
019-540-008 $175.48
019-540-009 $175.48
019-540-010 $175.48
019-540-011 $175.48
019-540-012 $175.48
019-540-013 $175.48
019-540-014 $175.48
019-540-015 $175.48
019-540-016 $175.48
019-540-017 $175.48
019-540-018 $175.48
019-540-019 $175.48
019-540-020 $175.48
019-540-021 $175.48
019-540-022 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-540-023 $175.48
019-540-024 $175.48
019-540-025 $175.48
019-540-026 $175.48
019-550-001 $175.48
019-550-002 $175.48
019-550-003 $175.48
019-550-004 $175.48
019-550-005 $175.48
019-550-006 $175.48
019-550-007 $175.48
019-550-008 $175.48
019-550-009 $175.48
019-550-010 $175.48
019-550-011 $175.48
019-550-012 $175.48
019-550-013 $175.48
019-550-014 $175.48
019-550-015 $175.48
019-550-016 $175.48
019-550-017 $175.48
019-550-018 $175.48
019-550-019 $175.48
019-550-020 $175.48
019-550-021 $175.48
019-550-022 $175.48
019-550-023 $175.48
019-550-024 $175.48
019-560-001 $175.48
019-560-002 $175.48
019-560-003 $175.48
019-560-004 $175.48
019-560-005 $175.48
019-560-006 $175.48
019-560-007 $175.48
019-560-008 $175.48
019-560-009 $175.48
019-560-010 $175.48
019-560-011 $175.48
019-560-012 $175.48
019-560-013 $175.48
019-560-014 $175.48
019-560-015 $175.48
019-560-016 $175.48
019-560-017 $175.48
019-560-018 $175.48
019-560-019 $175.48
019-560-020 $175.48
019-560-021 $175.48
019-560-022 $175.48
019-560-023 $175.48
019-560-024 $175.48
019-560-025 $175.48
019-560-026 $175.48
019-560-027 $175.48
019-560-028 $175.48
019-560-029 $175.48
019-560-030 $175.48
019-560-031 $175.48
019-560-032 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-560-033 $175.48
019-560-034 $175.48
019-560-035 $175.48
019-560-036 $175.48
019-560-037 $175.48
019-560-038 $175.48
019-570-001 $175.48
019-570-002 $175.48
019-570-003 $175.48
019-570-004 $175.48
019-570-005 $175.48
019-570-006 $175.48
019-570-007 $175.48
019-570-008 $175.48
019-570-009 $175.48
019-570-010 $175.48
019-570-011 $175.48
019-570-012 $175.48
019-570-013 $175.48
019-570-014 $175.48
019-570-015 $175.48
019-570-016 $175.48
019-570-017 $175.48
019-570-018 $175.48
019-570-019 $175.48
019-570-020 $175.48
019-570-021 $175.48
019-570-022 $175.48
019-570-023 $175.48
019-570-024 $175.48
019-570-025 $175.48
019-570-026 $175.48
019-570-027 $175.48
019-570-028 $175.48
019-570-029 $175.48
019-570-030 $175.48
019-570-031 $175.48
019-570-032 $175.48
019-570-033 $175.48
019-570-034 $175.48
019-570-035 $175.48
019-570-036 $175.48
019-570-037 $175.48
019-570-038 $175.48
019-570-039 $175.48
019-570-040 $175.48
019-580-001 $175.48
019-580-002 $175.48
019-580-003 $175.48
019-580-004 $175.48
019-580-005 $175.48
019-580-006 $175.48
019-580-007 $175.48
019-580-008 $175.48
019-580-009 $175.48
019-580-010 $175.48
019-580-011 $175.48
019-580-012 $175.48
019-580-013 $175.48
019-580-014 $175.48
- 82 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-580-015 $175.48
019-580-016 $175.48
019-580-017 $175.48
019-580-018 $175.48
019-580-019 $175.48
019-580-020 $175.48
019-580-021 $175.48
019-580-022 $175.48
019-580-023 $175.48
019-580-024 $175.48
019-580-025 $175.48
019-580-026 $175.48
019-580-027 $175.48
019-580-028 $175.48
019-580-029 $175.48
019-580-030 $175.48
019-580-031 $175.48
019-580-032 $175.48
019-580-033 $175.48
019-580-034 $175.48
019-580-035 $175.48
019-580-036 $175.48
019-590-001 $175.48
019-590-002 $175.48
019-590-003 $175.48
019-590-004 $175.48
019-590-005 $175.48
019-590-006 $175.48
019-590-007 $175.48
019-590-008 $175.48
019-590-009 $175.48
019-590-010 $175.48
019-590-011 $175.48
019-590-012 $175.48
019-590-013 $175.48
019-590-014 $175.48
019-590-015 $175.48
019-590-016 $175.48
019-590-017 $175.48
019-590-018 $175.48
019-590-019 $175.48
019-590-020 $175.48
019-590-021 $175.48
019-590-022 $175.48
019-590-023 $175.48
019-590-024 $175.48
019-590-025 $175.48
019-590-026 $175.48
019-590-027 $175.48
019-590-028 $175.48
019-590-029 $175.48
019-590-030 $175.48
019-590-031 $175.48
019-590-032 $175.48
019-590-033 $175.48
019-590-034 $175.48
019-590-035 $175.48
019-590-036 $175.48
019-590-037 $175.48
019-600-001 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-600-002 $175.48
019-600-003 $175.48
019-600-004 $175.48
019-600-005 $175.48
019-600-006 $175.48
019-600-007 $175.48
019-600-008 $175.48
019-600-009 $175.48
019-600-010 $175.48
019-600-011 $175.48
019-600-012 $175.48
019-600-013 $175.48
019-600-014 $175.48
019-600-015 $175.48
019-600-016 $175.48
019-600-017 $175.48
019-600-018 $175.48
019-600-019 $175.48
019-600-020 $175.48
019-600-021 $175.48
019-600-022 $175.48
019-600-023 $175.48
019-600-024 $175.48
019-600-025 $175.48
019-600-026 $175.48
019-600-027 $175.48
019-600-028 $175.48
019-600-029 $175.48
019-600-030 $175.48
019-600-031 $175.48
019-600-032 $175.48
019-600-033 $175.48
019-600-034 $175.48
019-600-035 $175.48
019-600-036 $175.48
019-600-037 $175.48
019-600-038 $175.48
019-600-039 $175.48
019-600-040 $175.48
019-600-041 $175.48
019-600-042 $175.48
019-600-043 $175.48
019-600-044 $175.48
019-600-045 $175.48
019-600-052 $175.48
019-600-053 $175.48
019-600-054 $175.48
019-600-055 $175.48
019-600-056 $175.48
019-600-057 $175.48
019-600-058 $175.48
019-600-059 $175.48
019-600-060 $175.48
019-600-061 $175.48
019-600-062 $175.48
019-600-063 $175.48
019-600-064 $175.48
019-600-065 $175.48
019-600-066 $175.48
019-600-067 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-600-068 $175.48
019-600-069 $175.48
019-600-070 $175.48
019-600-071 $175.48
019-600-072 $175.48
019-600-073 $175.48
019-600-074 $175.48
019-600-075 $175.48
019-600-076 $175.48
019-600-077 $175.48
019-600-078 $175.48
019-600-079 $175.48
019-600-080 $175.48
019-600-081 $175.48
019-600-082 $175.48
019-600-083 $175.48
019-600-084 $175.48
019-600-085 $175.48
019-600-086 $175.48
019-600-087 $175.48
019-600-088 $175.48
019-600-089 $175.48
019-600-094 $175.48
019-600-095 $175.48
019-600-096 $175.48
019-600-097 $175.48
019-600-098 $175.48
019-600-099 $175.48
019-610-001 $175.48
019-610-002 $175.48
019-610-003 $175.48
019-610-004 $175.48
019-610-005 $175.48
019-610-006 $175.48
019-610-007 $175.48
019-610-008 $175.48
019-610-009 $175.48
019-610-010 $175.48
019-610-011 $175.48
019-610-012 $175.48
019-610-013 $175.48
019-610-014 $175.48
019-610-015 $175.48
019-610-016 $175.48
019-610-017 $175.48
019-610-018 $175.48
019-610-019 $175.48
019-610-020 $175.48
019-610-021 $175.48
019-610-022 $175.48
019-610-023 $175.48
019-610-024 $175.48
019-610-025 $175.48
019-610-026 $175.48
019-610-027 $175.48
019-610-028 $175.48
019-610-029 $175.48
019-610-030 $175.48
019-610-031 $175.48
019-610-032 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-610-033 $175.48
019-610-034 $175.48
019-610-035 $175.48
019-610-036 $175.48
019-610-037 $175.48
019-610-038 $175.48
019-610-039 $175.48
019-610-040 $175.48
019-610-041 $175.48
019-610-042 $175.48
019-610-043 $175.48
019-610-044 $175.48
019-610-045 $175.48
019-610-046 $175.48
019-610-047 $175.48
019-610-048 $175.48
019-620-052 $175.48
019-620-053 $175.48
019-620-054 $175.48
019-620-055 $175.48
019-620-056 $175.48
019-620-057 $175.48
019-620-058 $175.48
019-620-059 $175.48
019-620-060 $175.48
019-620-061 $175.48
019-620-062 $175.48
019-620-063 $175.48
019-620-064 $175.48
019-620-065 $175.48
019-620-066 $175.48
019-620-067 $175.48
019-620-068 $175.48
019-620-069 $175.48
019-620-070 $175.48
019-620-071 $175.48
019-620-072 $175.48
019-620-073 $175.48
019-620-074 $175.48
019-620-075 $175.48
019-620-076 $175.48
019-620-077 $175.48
019-620-078 $175.48
019-620-079 $175.48
019-620-080 $175.48
019-620-081 $175.48
019-620-085 $175.48
019-620-086 $175.48
019-620-087 $175.48
019-620-088 $175.48
019-620-089 $175.48
019-620-090 $175.48
019-620-091 $175.48
019-620-092 $175.48
019-620-093 $175.48
019-620-094 $175.48
019-620-095 $175.48
019-620-096 $175.48
019-620-097 $175.48
019-620-098 $175.48
- 83 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-620-099 $175.48
019-620-100 $175.48
019-620-101 $175.48
019-620-102 $175.48
019-620-103 $175.48
019-620-104 $175.48
019-620-105 $175.48
019-620-106 $175.48
019-620-107 $175.48
019-620-108 $175.48
019-620-109 $175.48
019-620-110 $175.48
019-620-111 $175.48
019-620-112 $175.48
019-620-113 $175.48
019-620-114 $175.48
019-620-115 $175.48
019-620-116 $175.48
019-620-117 $175.48
019-620-118 $175.48
019-620-119 $175.48
019-620-120 $175.48
019-620-121 $175.48
019-620-122 $175.48
019-620-123 $175.48
019-620-124 $175.48
019-620-125 $175.48
019-620-126 $175.48
019-620-127 $175.48
019-620-128 $175.48
019-620-129 $175.48
019-620-130 $175.48
019-620-131 $175.48
019-620-132 $175.48
019-620-133 $175.48
019-620-134 $175.48
019-620-135 $175.48
019-630-004 $175.48
019-630-005 $175.48
019-630-006 $175.48
019-630-007 $175.48
019-630-008 $175.48
019-630-009 $175.48
019-630-010 $175.48
019-630-011 $175.48
019-630-012 $175.48
019-630-018 $175.48
019-630-019 $175.48
019-630-020 $175.48
019-630-021 $175.48
019-630-022 $175.48
019-630-023 $175.48
019-630-024 $175.48
019-630-025 $175.48
019-630-026 $175.48
019-630-027 $175.48
019-630-028 $175.48
019-630-029 $175.48
019-630-030 $175.48
019-630-031 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-630-032 $175.48
019-630-033 $175.48
019-630-034 $175.48
019-630-035 $175.48
019-630-036 $175.48
019-630-037 $175.48
019-630-045 $175.48
019-630-046 $175.48
019-630-047 $175.48
019-630-048 $175.48
019-630-049 $175.48
019-630-050 $175.48
019-630-051 $175.48
019-630-052 $175.48
019-630-053 $175.48
019-630-054 $175.48
019-630-055 $175.48
019-630-056 $175.48
019-630-057 $175.48
019-630-058 $175.48
019-630-059 $175.48
019-630-060 $175.48
019-630-061 $175.48
019-630-062 $175.48
019-630-063 $175.48
019-630-064 $175.48
019-630-065 $175.48
019-630-066 $175.48
019-630-067 $175.48
019-630-068 $175.48
019-630-069 $175.48
019-630-070 $175.48
019-630-071 $175.48
019-630-072 $175.48
019-630-073 $175.48
019-630-074 $175.48
019-630-075 $175.48
019-630-076 $175.48
019-630-077 $175.48
019-630-078 $175.48
019-630-079 $175.48
019-630-080 $175.48
019-630-081 $175.48
019-630-082 $175.48
019-630-083 $175.48
019-630-084 $175.48
019-630-085 $175.48
019-630-086 $175.48
019-630-087 $175.48
019-630-088 $175.48
019-630-089 $175.48
019-630-090 $175.48
019-630-091 $175.48
019-630-092 $175.48
019-630-093 $175.48
019-630-094 $175.48
019-630-095 $175.48
019-630-096 $175.48
019-630-097 $175.48
019-630-098 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-630-099 $175.48
019-630-100 $175.48
019-630-101 $175.48
019-630-102 $175.48
019-630-103 $175.48
019-630-104 $175.48
019-630-105 $175.48
019-630-106 $175.48
019-630-107 $175.48
019-630-108 $175.48
019-630-109 $175.48
019-630-110 $175.48
019-640-001 $175.48
019-640-002 $175.48
019-640-003 $175.48
019-640-004 $175.48
019-640-005 $175.48
019-640-006 $175.48
019-640-007 $175.48
019-640-008 $175.48
019-640-009 $175.48
019-640-010 $175.48
019-640-011 $175.48
019-640-012 $175.48
019-640-013 $175.48
019-640-014 $175.48
019-640-015 $175.48
019-640-016 $175.48
019-640-017 $175.48
019-640-018 $175.48
019-640-019 $175.48
019-640-020 $175.48
019-640-021 $175.48
019-640-022 $175.48
019-640-023 $175.48
019-640-024 $175.48
019-640-025 $175.48
019-640-026 $175.48
019-640-027 $175.48
019-640-028 $175.48
019-640-029 $175.48
019-640-030 $175.48
019-640-031 $175.48
019-640-032 $175.48
019-640-033 $175.48
019-640-034 $175.48
019-640-035 $175.48
019-640-036 $175.48
019-640-037 $175.48
019-640-038 $175.48
019-640-039 $175.48
019-640-040 $175.48
019-640-041 $175.48
019-640-042 $175.48
019-640-043 $175.48
019-650-001 $175.48
019-650-002 $175.48
019-650-003 $175.48
019-650-004 $175.48
019-650-005 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-650-006 $175.48
019-650-007 $175.48
019-650-008 $175.48
019-650-009 $175.48
019-650-010 $175.48
019-650-011 $175.48
019-650-012 $175.48
019-650-013 $175.48
019-650-014 $175.48
019-650-015 $175.48
019-650-016 $175.48
019-650-017 $175.48
019-650-018 $175.48
019-650-019 $175.48
019-650-020 $175.48
019-650-021 $175.48
019-650-022 $175.48
019-650-023 $175.48
019-660-001 $175.48
019-660-002 $175.48
019-660-003 $175.48
019-660-004 $175.48
019-660-005 $175.48
019-660-006 $175.48
019-660-007 $175.48
019-660-008 $175.48
019-660-009 $175.48
019-660-010 $175.48
019-660-011 $175.48
019-660-012 $175.48
019-660-013 $175.48
019-660-014 $175.48
019-660-015 $175.48
019-660-016 $175.48
019-660-017 $175.48
019-660-018 $175.48
019-660-019 $175.48
019-660-020 $175.48
019-660-021 $175.48
019-660-022 $175.48
019-660-023 $175.48
019-660-024 $175.48
019-660-025 $175.48
019-660-026 $175.48
019-660-027 $175.48
019-660-028 $175.48
019-660-029 $175.48
019-660-030 $175.48
019-660-031 $175.48
019-660-032 $175.48
019-660-033 $175.48
019-660-034 $175.48
019-660-035 $175.48
019-670-019 $175.48
019-670-020 $175.48
019-670-021 $175.48
019-670-022 $175.48
019-670-023 $175.48
019-670-024 $175.48
019-670-025 $175.48
- 84 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-670-026 $175.48
019-670-027 $175.48
019-670-028 $175.48
019-670-029 $175.48
019-670-030 $175.48
019-670-031 $175.48
019-680-023 $36.14
019-680-024 $175.48
019-680-025 $175.48
019-680-026 $175.48
019-680-027 $175.48
019-680-028 $175.48
019-680-029 $175.48
019-680-030 $175.48
019-680-031 $175.48
019-680-032 $175.48
019-680-033 $175.48
019-680-034 $175.48
019-680-035 $175.48
019-680-036 $175.48
019-680-037 $175.48
019-680-038 $175.48
019-680-039 $175.48
019-680-040 $175.48
019-680-041 $175.48
019-680-042 $175.48
019-690-001 $175.48
019-690-002 $175.48
019-690-003 $175.48
019-690-004 $175.48
019-690-005 $175.48
019-690-006 $175.48
019-690-007 $175.48
019-690-008 $175.48
019-690-009 $175.48
019-690-010 $175.48
019-690-011 $175.48
019-690-012 $175.48
019-690-013 $175.48
019-690-014 $175.48
019-690-015 $175.48
019-690-016 $175.48
019-690-017 $175.48
019-690-018 $175.48
019-690-019 $175.48
019-690-020 $175.48
019-690-021 $175.48
019-690-022 $175.48
019-690-023 $175.48
019-690-024 $175.48
019-690-025 $175.48
019-690-026 $175.48
019-690-027 $175.48
019-690-028 $175.48
019-690-029 $175.48
019-690-030 $175.48
019-690-031 $175.48
019-690-032 $175.48
019-690-033 $175.48
019-690-034 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-690-035 $175.48
019-690-036 $175.48
019-690-037 $175.48
019-690-038 $175.48
019-690-039 $175.48
019-690-040 $175.48
019-690-041 $175.48
019-690-042 $175.48
019-690-043 $175.48
019-690-044 $175.48
019-690-045 $175.48
019-690-046 $175.48
019-690-047 $175.48
019-690-048 $175.48
019-690-049 $175.48
019-690-050 $175.48
019-690-051 $175.48
019-690-053 $175.48
019-700-001 $175.48
019-700-002 $175.48
019-700-003 $175.48
019-700-004 $175.48
019-700-005 $175.48
019-700-006 $175.48
019-700-007 $175.48
019-700-008 $175.48
019-700-009 $175.48
019-700-010 $175.48
019-700-011 $175.48
019-700-012 $175.48
019-700-013 $175.48
019-700-014 $175.48
019-700-015 $175.48
019-700-016 $175.48
019-700-017 $175.48
019-700-018 $175.48
019-700-019 $175.48
019-700-020 $175.48
019-700-021 $175.48
019-700-022 $175.48
019-700-023 $175.48
019-700-024 $175.48
019-700-025 $175.48
019-700-026 $175.48
019-700-027 $175.48
019-700-028 $175.48
019-700-029 $175.48
019-700-030 $175.48
019-700-031 $175.48
019-710-001 $175.48
019-710-002 $175.48
019-710-003 $175.48
019-710-004 $175.48
019-710-005 $175.48
019-710-006 $175.48
019-710-007 $175.48
019-710-008 $175.48
019-710-009 $175.48
019-710-010 $175.48
019-710-011 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-710-012 $175.48
019-710-013 $175.48
019-710-014 $175.48
019-710-015 $175.48
019-710-016 $175.48
019-710-017 $175.48
019-710-018 $175.48
019-710-019 $175.48
019-710-020 $175.48
019-710-021 $175.48
019-710-022 $175.48
019-720-001 $175.48
019-720-002 $175.48
019-720-003 $175.48
019-720-004 $175.48
019-720-005 $175.48
019-720-006 $175.48
019-720-007 $175.48
019-720-008 $175.48
019-720-009 $175.48
019-720-010 $175.48
019-720-011 $175.48
019-720-012 $175.48
019-720-013 $175.48
019-720-014 $175.48
019-720-015 $175.48
019-720-016 $175.48
019-720-017 $175.48
019-720-018 $175.48
019-720-019 $175.48
019-720-020 $175.48
019-720-021 $175.48
019-720-022 $175.48
019-720-023 $175.48
019-720-024 $175.48
019-720-025 $175.48
019-720-026 $175.48
019-720-027 $175.48
019-720-028 $175.48
019-720-029 $175.48
019-720-030 $175.48
019-720-031 $175.48
019-720-032 $175.48
019-720-033 $175.48
019-720-034 $175.48
019-720-035 $175.48
019-720-036 $175.48
019-720-037 $175.48
019-720-038 $175.48
019-720-039 $175.48
019-720-040 $175.48
019-720-041 $175.48
019-720-042 $175.48
019-720-043 $175.48
019-720-044 $175.48
019-720-045 $175.48
019-720-046 $175.48
019-720-047 $175.48
019-720-048 $175.48
019-720-049 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-720-050 $175.48
019-720-051 $175.48
019-720-052 $175.48
019-720-053 $175.48
019-720-054 $175.48
019-720-055 $175.48
019-720-056 $175.48
019-720-057 $175.48
019-720-058 $175.48
019-720-059 $175.48
019-720-060 $175.48
019-720-061 $175.48
019-720-062 $175.48
019-720-063 $175.48
019-720-064 $175.48
019-720-065 $175.48
019-720-066 $175.48
019-720-067 $175.48
019-720-068 $175.48
019-720-069 $175.48
019-720-070 $175.48
019-720-071 $175.48
019-720-072 $175.48
019-720-073 $175.48
019-720-074 $175.48
019-720-075 $175.48
019-720-076 $175.48
019-720-077 $175.48
019-720-078 $175.48
019-730-001 $175.48
019-730-002 $175.48
019-730-003 $175.48
019-730-004 $175.48
019-730-005 $175.48
019-730-006 $175.48
019-730-007 $175.48
019-730-008 $175.48
019-730-009 $175.48
019-730-010 $175.48
019-730-011 $175.48
019-730-012 $175.48
019-730-013 $175.48
019-730-014 $175.48
019-730-015 $175.48
019-730-016 $175.48
019-730-017 $175.48
019-730-018 $175.48
019-730-019 $175.48
019-730-020 $175.48
019-730-021 $175.48
019-730-022 $175.48
019-730-023 $175.48
019-730-024 $175.48
019-730-025 $175.48
019-730-026 $175.48
019-730-027 $175.48
019-730-028 $175.48
019-730-029 $175.48
019-730-030 $175.48
019-730-031 $175.48
- 85 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-730-032 $175.48
019-730-033 $175.48
019-730-034 $175.48
019-730-035 $175.48
019-730-036 $175.48
019-730-037 $175.48
019-730-038 $175.48
019-730-039 $175.48
019-730-040 $175.48
019-730-041 $175.48
019-730-042 $175.48
019-730-043 $175.48
019-730-044 $175.48
019-730-045 $175.48
019-730-046 $175.48
019-730-047 $175.48
019-730-048 $175.48
019-730-049 $175.48
019-730-050 $175.48
019-730-051 $175.48
019-730-052 $175.48
019-730-053 $175.48
019-730-054 $175.48
019-730-055 $175.48
019-730-056 $175.48
019-730-057 $175.48
019-730-058 $175.48
019-730-059 $175.48
019-740-001 $175.48
019-740-002 $175.48
019-740-003 $175.48
019-740-004 $175.48
019-740-005 $175.48
019-740-006 $175.48
019-740-007 $175.48
019-740-008 $175.48
019-740-009 $175.48
019-740-010 $175.48
019-740-011 $175.48
019-740-012 $175.48
019-740-013 $175.48
019-740-014 $175.48
019-740-015 $175.48
019-740-016 $175.48
019-740-017 $175.48
019-740-018 $175.48
019-740-019 $175.48
019-740-020 $175.48
019-740-021 $175.48
019-740-022 $175.48
019-740-023 $175.48
019-740-024 $175.48
019-740-025 $175.48
019-740-026 $175.48
019-740-027 $175.48
019-740-028 $175.48
019-740-029 $175.48
019-740-030 $175.48
019-740-031 $175.48
019-740-032 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-740-033 $175.48
019-740-034 $175.48
019-740-035 $175.48
019-740-036 $175.48
019-740-037 $175.48
019-740-038 $175.48
019-740-039 $175.48
019-740-040 $175.48
019-740-041 $175.48
019-740-042 $175.48
019-740-043 $175.48
019-740-044 $175.48
019-740-045 $175.48
019-740-046 $175.48
019-740-047 $175.48
019-740-048 $175.48
019-740-049 $175.48
019-740-050 $175.48
019-740-051 $175.48
019-740-052 $175.48
019-740-053 $175.48
019-740-054 $175.48
019-740-055 $175.48
019-750-001 $175.48
019-750-002 $175.48
019-750-003 $175.48
019-750-004 $175.48
019-750-005 $175.48
019-750-006 $175.48
019-750-007 $175.48
019-750-008 $175.48
019-750-009 $175.48
019-750-010 $175.48
019-750-011 $175.48
019-750-012 $175.48
019-750-013 $175.48
019-750-014 $175.48
019-750-015 $175.48
019-750-016 $175.48
019-750-017 $175.48
019-750-018 $175.48
019-750-019 $175.48
019-750-020 $175.48
019-750-021 $175.48
019-750-022 $175.48
019-750-023 $175.48
019-750-024 $175.48
019-750-025 $175.48
019-750-026 $175.48
019-750-027 $175.48
019-750-028 $175.48
019-750-029 $175.48
019-750-030 $175.48
019-750-031 $175.48
019-750-032 $175.48
019-750-033 $175.48
019-750-034 $175.48
019-750-035 $175.48
019-750-036 $175.48
019-750-037 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-750-038 $175.48
019-750-039 $175.48
019-750-040 $175.48
019-750-041 $175.48
019-750-042 $175.48
019-750-043 $175.48
019-750-044 $175.48
019-750-045 $175.48
019-750-046 $175.48
019-750-047 $175.48
019-750-048 $175.48
019-750-049 $175.48
019-750-054 $175.48
019-750-055 $4.58
019-750-058 $175.48
019-750-059 $175.48
019-750-060 $175.48
019-750-061 $175.48
019-750-062 $175.48
019-750-063 $175.48
019-760-001 $175.48
019-760-002 $175.48
019-760-003 $175.48
019-760-004 $175.48
019-760-005 $175.48
019-760-006 $175.48
019-760-007 $175.48
019-760-008 $175.48
019-760-010 $175.48
019-760-011 $175.48
019-760-012 $175.48
019-760-013 $175.48
019-760-014 $175.48
019-760-015 $175.48
019-760-016 $175.48
019-760-017 $175.48
019-760-018 $175.48
019-760-019 $175.48
019-760-020 $175.48
019-760-021 $175.48
019-760-022 $175.48
019-760-023 $175.48
019-760-024 $175.48
019-760-025 $175.48
019-760-026 $175.48
019-760-027 $175.48
019-760-028 $175.48
019-760-029 $175.48
019-760-030 $175.48
019-760-031 $175.48
019-760-032 $175.48
019-760-033 $175.48
019-760-034 $175.48
019-760-035 $175.48
019-760-036 $175.48
019-760-037 $175.48
019-760-038 $175.48
019-760-039 $175.48
019-760-040 $175.48
019-760-041 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-760-042 $175.48
019-760-043 $175.48
019-760-044 $175.48
019-760-045 $175.48
019-760-046 $175.48
019-760-047 $175.48
019-760-048 $175.48
019-760-049 $175.48
019-760-050 $175.48
019-760-051 $175.48
019-760-052 $175.48
019-760-053 $175.48
019-760-054 $175.48
019-760-055 $175.48
019-760-059 $175.48
019-760-060 $175.48
019-770-001 $175.48
019-770-002 $175.48
019-770-003 $175.48
019-770-004 $175.48
019-770-005 $175.48
019-770-006 $175.48
019-770-007 $175.48
019-770-008 $175.48
019-770-009 $175.48
019-770-010 $175.48
019-770-011 $175.48
019-770-012 $175.48
019-770-013 $175.48
019-770-014 $175.48
019-770-015 $175.48
019-770-016 $175.48
019-770-017 $175.48
019-770-018 $175.48
019-770-019 $175.48
019-770-020 $175.48
019-770-021 $175.48
019-770-022 $175.48
019-770-023 $175.48
019-770-024 $175.48
019-770-025 $175.48
019-770-026 $175.48
019-770-027 $175.48
019-770-028 $175.48
019-770-029 $175.48
019-770-030 $175.48
019-770-031 $175.48
019-770-032 $175.48
019-770-033 $175.48
019-770-034 $175.48
019-770-035 $175.48
019-770-036 $175.48
019-770-037 $175.48
019-770-041 $175.48
019-770-042 $175.48
019-780-001 $175.48
019-780-002 $175.48
019-780-003 $175.48
019-780-004 $175.48
019-780-005 $175.48
- 86 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-780-006 $175.48
019-780-007 $175.48
019-780-008 $175.48
019-780-009 $175.48
019-780-010 $175.48
019-780-011 $175.48
019-780-012 $175.48
019-780-013 $175.48
019-780-014 $175.48
019-780-015 $175.48
019-780-016 $175.48
019-780-017 $175.48
019-780-018 $175.48
019-780-019 $175.48
019-780-020 $175.48
019-780-021 $175.48
019-780-022 $175.48
019-780-023 $175.48
019-780-024 $175.48
019-780-025 $175.48
019-780-026 $175.48
019-780-027 $175.48
019-780-028 $175.48
019-780-029 $175.48
019-780-030 $175.48
019-780-031 $175.48
019-780-032 $175.48
019-780-033 $175.48
019-780-034 $175.48
019-780-035 $175.48
019-780-036 $175.48
019-780-037 $175.48
019-780-038 $175.48
019-780-039 $175.48
019-780-040 $175.48
019-780-041 $175.48
019-780-042 $175.48
019-780-043 $175.48
019-780-044 $175.48
019-780-045 $175.48
019-780-046 $175.48
019-780-047 $175.48
019-780-048 $175.48
019-780-049 $175.48
019-780-050 $175.48
019-780-051 $175.48
019-780-052 $175.48
019-790-001 $175.48
019-790-002 $175.48
019-790-003 $175.48
019-790-004 $175.48
019-790-005 $175.48
019-790-006 $175.48
019-790-007 $175.48
019-790-008 $175.48
019-790-009 $175.48
019-790-010 $175.48
019-790-011 $175.48
019-790-012 $175.48
019-790-013 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-790-014 $175.48
019-790-015 $175.48
019-790-016 $175.48
019-790-017 $175.48
019-790-018 $175.48
019-790-019 $175.48
019-790-020 $175.48
019-790-021 $175.48
019-790-022 $175.48
019-790-023 $175.48
019-790-024 $175.48
019-790-025 $175.48
019-790-026 $175.48
019-790-027 $175.48
019-790-028 $175.48
019-790-029 $175.48
019-790-030 $175.48
019-790-031 $175.48
019-790-032 $175.48
019-790-033 $175.48
019-790-034 $175.48
019-790-035 $175.48
019-790-036 $175.48
019-790-037 $175.48
019-790-038 $175.48
019-790-039 $175.48
019-790-040 $175.48
019-790-041 $175.48
019-790-042 $175.48
019-790-043 $175.48
019-790-044 $175.48
019-800-001 $175.48
019-800-002 $175.48
019-800-003 $175.48
019-800-004 $175.48
019-800-005 $175.48
019-800-006 $175.48
019-800-007 $175.48
019-800-008 $175.48
019-800-009 $175.48
019-800-010 $175.48
019-800-011 $175.48
019-800-012 $175.48
019-800-013 $175.48
019-800-014 $175.48
019-800-015 $175.48
019-800-016 $175.48
019-800-017 $175.48
019-800-018 $175.48
019-800-019 $175.48
019-800-020 $175.48
019-800-021 $175.48
019-800-022 $175.48
019-800-023 $175.48
019-800-024 $175.48
019-800-025 $175.48
019-800-026 $175.48
019-800-027 $175.48
019-800-028 $175.48
019-800-029 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-800-030 $175.48
019-800-031 $175.48
019-800-033 $175.48
019-810-001 $175.48
019-810-002 $175.48
019-810-003 $175.48
019-810-004 $175.48
019-810-005 $175.48
019-810-006 $175.48
019-810-007 $175.48
019-810-008 $175.48
019-810-009 $175.48
019-810-010 $175.48
019-810-011 $175.48
019-810-012 $175.48
019-810-013 $175.48
019-810-014 $175.48
019-810-015 $175.48
019-810-016 $175.48
019-810-017 $175.48
019-810-018 $175.48
019-810-019 $175.48
019-810-020 $175.48
019-810-021 $175.48
019-810-022 $175.48
019-810-023 $175.48
019-810-024 $175.48
019-810-025 $175.48
019-810-026 $175.48
019-810-027 $175.48
019-810-028 $175.48
019-820-001 $175.48
019-820-002 $175.48
019-820-003 $175.48
019-820-004 $175.48
019-820-005 $175.48
019-820-006 $175.48
019-820-007 $175.48
019-820-008 $175.48
019-820-009 $175.48
019-820-010 $175.48
019-820-011 $175.48
019-820-012 $175.48
019-820-013 $175.48
019-820-014 $175.48
019-820-015 $175.48
019-820-016 $175.48
019-820-017 $175.48
019-820-018 $175.48
019-820-019 $175.48
019-820-020 $175.48
019-820-021 $175.48
019-820-022 $175.48
019-820-023 $175.48
019-820-024 $175.48
019-820-025 $175.48
019-820-026 $175.48
019-820-027 $175.48
019-820-028 $175.48
019-820-029 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-820-030 $175.48
019-820-031 $175.48
019-820-032 $175.48
019-820-033 $175.48
019-820-034 $175.48
019-820-035 $175.48
019-820-036 $175.48
019-820-037 $175.48
019-820-038 $175.48
019-820-039 $175.48
019-820-040 $175.48
019-820-041 $175.48
019-820-042 $175.48
019-820-043 $175.48
019-820-044 $175.48
019-820-045 $175.48
019-820-046 $175.48
019-820-047 $175.48
019-820-048 $175.48
019-820-049 $175.48
019-820-050 $175.48
019-820-051 $175.48
019-820-052 $175.48
019-820-053 $175.48
019-820-054 $175.48
019-820-055 $175.48
019-820-056 $175.48
019-820-057 $175.48
019-820-058 $175.48
019-820-059 $175.48
019-820-060 $175.48
019-820-061 $175.48
019-820-062 $175.48
019-820-063 $175.48
019-830-001 $175.48
019-830-002 $175.48
019-830-003 $175.48
019-830-004 $175.48
019-830-005 $175.48
019-830-006 $175.48
019-830-007 $175.48
019-830-008 $175.48
019-830-009 $175.48
019-830-010 $175.48
019-830-011 $175.48
019-830-012 $175.48
019-830-013 $175.48
019-830-014 $175.48
019-830-015 $175.48
019-830-016 $175.48
019-830-017 $175.48
019-830-018 $175.48
019-830-019 $175.48
019-830-020 $175.48
019-830-021 $175.48
019-830-022 $175.48
019-830-023 $175.48
019-830-024 $175.48
019-830-025 $175.48
019-830-026 $175.48
- 87 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-830-027 $175.48
019-830-028 $175.48
019-830-029 $175.48
019-840-001 $175.48
019-840-002 $175.48
019-840-003 $175.48
019-840-004 $175.48
019-840-005 $175.48
019-840-006 $175.48
019-840-007 $175.48
019-840-008 $175.48
019-840-009 $175.48
019-840-010 $175.48
019-840-011 $175.48
019-840-012 $175.48
019-840-013 $175.48
019-840-014 $175.48
019-840-015 $175.48
019-840-016 $175.48
019-840-017 $175.48
019-840-018 $175.48
019-840-019 $175.48
019-840-020 $175.48
019-840-021 $175.48
019-840-022 $175.48
019-840-023 $175.48
019-840-024 $175.48
019-840-025 $175.48
019-840-026 $175.48
019-840-027 $175.48
019-840-028 $175.48
019-840-029 $175.48
019-840-030 $175.48
019-840-031 $175.48
019-840-032 $175.48
019-840-033 $175.48
019-840-034 $175.48
019-840-035 $175.48
019-840-036 $175.48
019-840-037 $175.48
019-840-038 $175.48
019-840-039 $175.48
019-840-040 $175.48
019-840-041 $175.48
019-840-042 $175.48
019-840-043 $175.48
019-840-044 $175.48
019-840-045 $175.48
019-840-046 $175.48
019-840-047 $175.48
019-840-048 $175.48
019-840-049 $175.48
019-840-050 $175.48
019-840-051 $175.48
019-840-052 $175.48
019-840-053 $175.48
019-840-054 $175.48
019-840-055 $175.48
019-840-056 $175.48
019-840-057 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-840-058 $175.48
019-840-059 $175.48
019-840-060 $175.48
019-840-061 $175.48
019-840-062 $175.48
019-840-063 $175.48
019-840-064 $175.48
019-840-065 $175.48
019-840-066 $175.48
019-840-067 $175.48
019-840-068 $175.48
019-840-069 $175.48
019-840-070 $175.48
019-840-071 $175.48
019-840-072 $175.48
019-840-073 $175.48
019-840-074 $175.48
019-840-075 $175.48
019-840-076 $175.48
019-840-077 $175.48
019-840-078 $175.48
019-840-079 $175.48
019-840-080 $175.48
019-840-081 $175.48
019-840-082 $175.48
019-840-083 $175.48
019-840-084 $175.48
019-840-085 $175.48
019-840-086 $175.48
019-840-087 $175.48
019-840-088 $175.48
019-840-089 $175.48
019-840-090 $175.48
019-840-091 $175.48
019-840-092 $175.48
019-840-093 $175.48
019-840-094 $175.48
019-840-095 $175.48
019-840-096 $175.48
019-840-097 $175.48
019-840-098 $175.48
019-840-099 $175.48
019-840-100 $175.48
019-840-101 $175.48
019-840-102 $175.48
019-840-103 $175.48
019-840-104 $175.48
019-850-001 $175.48
019-850-002 $175.48
019-850-003 $175.48
019-850-004 $175.48
019-850-005 $175.48
019-850-006 $175.48
019-850-007 $175.48
019-850-008 $175.48
019-850-009 $175.48
019-850-010 $175.48
019-850-011 $175.48
019-850-012 $175.48
019-850-013 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-850-014 $175.48
019-850-015 $175.48
019-850-016 $175.48
019-850-017 $175.48
019-850-018 $175.48
019-850-019 $175.48
019-850-020 $175.48
019-850-021 $175.48
019-850-022 $175.48
019-850-023 $175.48
019-850-024 $175.48
019-850-025 $175.48
019-850-026 $175.48
019-850-027 $175.48
019-850-028 $175.48
019-850-029 $175.48
019-850-030 $175.48
019-850-031 $175.48
019-850-032 $175.48
019-850-033 $175.48
019-850-034 $175.48
019-850-035 $175.48
019-850-036 $175.48
019-850-037 $175.48
019-850-038 $175.48
019-850-039 $175.48
019-850-040 $175.48
019-850-041 $175.48
019-850-042 $175.48
019-850-043 $175.48
019-850-044 $175.48
019-850-045 $175.48
019-850-046 $175.48
019-850-047 $175.48
019-850-048 $175.48
019-850-049 $175.48
019-850-050 $175.48
019-850-051 $175.48
019-850-052 $175.48
019-850-053 $175.48
019-850-054 $175.48
019-850-055 $175.48
019-850-056 $175.48
019-850-057 $175.48
019-850-058 $175.48
019-850-059 $175.48
019-850-060 $175.48
019-850-061 $175.48
019-850-062 $175.48
019-850-063 $175.48
019-850-064 $175.48
019-850-065 $175.48
019-850-066 $175.48
019-850-067 $175.48
019-850-068 $175.48
019-850-069 $175.48
019-850-070 $175.48
019-850-071 $175.48
019-850-072 $175.48
019-850-073 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-850-074 $175.48
019-850-075 $175.48
019-850-076 $175.48
019-850-077 $175.48
019-850-078 $175.48
019-850-079 $175.48
019-850-080 $175.48
019-850-081 $175.48
019-850-082 $175.48
019-850-083 $175.48
019-850-084 $175.48
019-850-085 $175.48
019-850-086 $175.48
019-850-087 $175.48
019-850-088 $175.48
019-850-089 $175.48
019-850-090 $175.48
019-850-091 $175.48
019-850-092 $175.48
019-850-093 $175.48
019-850-094 $175.48
019-850-095 $175.48
019-860-001 $175.48
019-860-002 $175.48
019-860-003 $175.48
019-860-004 $175.48
019-860-005 $175.48
019-860-006 $175.48
019-860-007 $175.48
019-860-008 $175.48
019-860-009 $175.48
019-860-010 $175.48
019-860-011 $175.48
019-860-012 $175.48
019-860-013 $175.48
019-860-014 $175.48
019-860-015 $175.48
019-860-016 $175.48
019-860-017 $175.48
019-860-018 $175.48
019-860-019 $175.48
019-860-020 $175.48
019-860-021 $175.48
019-860-022 $175.48
019-860-023 $175.48
019-860-024 $175.48
019-860-025 $175.48
019-860-026 $175.48
019-860-027 $175.48
019-860-028 $175.48
019-860-029 $175.48
019-860-030 $175.48
019-860-031 $175.48
019-860-032 $175.48
019-860-033 $175.48
019-860-034 $175.48
019-860-035 $175.48
019-860-036 $175.48
019-860-037 $175.48
019-860-038 $175.48
- 88 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-860-039 $175.48
019-860-040 $175.48
019-860-041 $175.48
019-860-042 $175.48
019-860-043 $175.48
019-860-044 $175.48
019-860-045 $175.48
019-860-046 $175.48
019-860-047 $175.48
019-860-048 $175.48
019-860-049 $175.48
019-860-050 $175.48
019-860-051 $175.48
019-860-052 $175.48
019-860-053 $175.48
019-860-054 $175.48
019-860-055 $175.48
019-860-056 $175.48
019-860-057 $175.48
019-860-058 $175.48
019-860-059 $175.48
019-870-001 $175.48
019-870-002 $175.48
019-870-003 $175.48
019-870-004 $175.48
019-870-005 $175.48
019-870-006 $175.48
019-870-007 $175.48
019-870-008 $175.48
019-870-009 $175.48
019-870-010 $175.48
019-870-011 $175.48
019-870-012 $175.48
019-870-013 $175.48
019-870-014 $175.48
019-870-015 $175.48
019-870-016 $175.48
019-870-017 $175.48
019-870-018 $175.48
019-870-019 $175.48
019-870-020 $175.48
019-870-021 $175.48
019-870-022 $175.48
019-870-023 $175.48
019-870-024 $175.48
019-870-025 $175.48
019-870-026 $175.48
019-870-027 $175.48
019-870-028 $175.48
019-870-029 $175.48
019-870-030 $175.48
019-870-031 $175.48
019-870-032 $175.48
019-870-033 $175.48
019-870-034 $175.48
019-870-035 $175.48
019-870-036 $175.48
019-870-037 $175.48
019-870-038 $175.48
019-870-039 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-870-040 $175.48
019-870-041 $175.48
019-870-042 $175.48
019-870-045 $175.48
019-870-046 $175.48
019-870-047 $175.48
019-870-048 $175.48
019-870-049 $175.48
019-870-050 $175.48
019-870-051 $175.48
019-870-052 $175.48
019-870-053 $175.48
019-880-001 $175.48
019-880-002 $175.48
019-880-003 $175.48
019-880-004 $175.48
019-880-005 $175.48
019-880-006 $175.48
019-880-007 $175.48
019-880-008 $175.48
019-880-009 $175.48
019-880-010 $175.48
019-880-011 $175.48
019-880-012 $175.48
019-890-001 $175.48
019-890-002 $175.48
019-890-003 $175.48
019-890-004 $175.48
019-890-005 $175.48
019-890-006 $175.48
019-890-007 $175.48
019-890-008 $175.48
019-890-009 $175.48
019-890-010 $175.48
019-890-011 $175.48
019-890-012 $175.48
019-890-013 $175.48
019-890-014 $175.48
019-890-015 $175.48
019-890-016 $175.48
019-890-017 $175.48
019-890-018 $175.48
019-890-019 $175.48
019-890-020 $175.48
019-890-021 $175.48
019-890-022 $175.48
019-890-023 $175.48
019-890-024 $175.48
019-890-025 $175.48
019-890-026 $175.48
019-890-027 $175.48
019-890-028 $175.48
019-890-029 $175.48
019-890-030 $175.48
019-890-031 $175.48
019-890-032 $175.48
019-890-033 $175.48
019-890-034 $175.48
019-890-035 $175.48
019-890-036 $175.48
Assessor's
Parcel No.

Assessment
Amount
019-890-037 $175.48
019-890-038 $175.48
019-890-039 $175.48
019-890-040 $175.48
019-890-041 $175.48
019-890-042 $175.48
019-890-043 $175.48
019-890-044 $175.48
019-890-045 $175.48
019-890-046 $175.48
019-890-047 $175.48
019-890-048 $175.48
019-890-049 $175.48
019-890-050 $175.48
019-890-051 $175.48
019-890-052 $175.48
019-890-053 $175.48
019-890-054 $175.48
019-890-055 $175.48
019-890-056 $175.48
019-890-057 $175.48
019-890-058 $175.48
019-890-059 $175.48
019-890-060 $175.48
019-890-061 $175.48
019-890-062 $175.48
019-890-063 $175.48
019-890-064 $175.48
019-890-065 $175.48
019-890-066 $175.48
019-890-067 $175.48
019-890-068 $175.48
019-890-069 $175.48
019-890-070 $175.48
019-890-071 $175.48
019-890-072 $175.48
019-890-073 $175.48
019-890-074 $175.48
019-890-075 $175.48
019-890-076 $175.48
019-890-077 $175.48
019-890-078 $175.48
019-890-079 $175.48
019-890-080 $175.48
019-890-081 $175.48
019-890-082 $175.48
019-890-083 $175.48
019-890-084 $175.48
019-890-085 $175.48
019-890-086 $175.48
019-890-087 $175.48
019-890-088 $175.48
019-890-089 $175.48
019-890-090 $175.48
019-900-001 $71.58
019-900-002 $39.12
019-900-003 $45.98
019-900-004 $28.06
019-900-005 $65.62
019-900-006 $52.12
Assessor's
Parcel No.

Assessment
Amount
019-900-007 $74.74
019-900-008 $52.12
019-900-009 $44.92
019-900-010 $39.12
019-900-011 $44.22
019-900-012 $28.78
019-900-013 $43.52
019-900-014 $50.88
019-900-015 $51.24
019-910-001 $149.86
019-910-002 $181.26
019-910-003 $228.30
019-910-006 $7,229.94
019-910-009 $219.16
019-910-010 $55.98
019-910-011 $647.68
019-910-012 $80.18
019-910-014 $186.70
019-910-015 $72.12
019-910-016 $12.64
019-920-001 $175.48
019-920-002 $175.48
019-920-003 $175.48
019-920-004 $175.48
019-920-005 $175.48
019-920-006 $175.48
019-920-007 $175.48
019-920-008 $175.48
019-920-009 $175.48
019-920-010 $175.48
019-920-011 $175.48
019-920-012 $175.48
019-920-013 $175.48
019-920-014 $175.48
019-920-015 $175.48
019-920-016 $175.48
019-920-017 $175.48
019-920-018 $175.48
019-920-019 $175.48
019-920-020 $175.48
019-920-021 $175.48
019-920-022 $175.48
019-920-023 $175.48
019-920-024 $175.48
019-920-025 $175.48
019-920-026 $175.48
019-920-027 $175.48
019-920-028 $175.48
019-920-029 $175.48
019-920-030 $175.48
019-920-031 $175.48
019-920-032 $175.48
019-920-033 $175.48
019-920-034 $175.48
019-920-035 $175.48
019-920-036 $175.48
019-920-037 $175.48
019-920-038 $175.48
019-920-039 $175.48
019-920-040 $175.48
- 89 - 04/15/26

CITY OF BRENTWOOD
Citywide Park Maintenance District No. 98-1

FINAL ASSESSMENT ROLL
Fiscal Year 2026-27
Assessor's
Parcel No.

Assessment
Amount
019-920-041 $175.48
019-920-042 $175.48
019-920-043 $175.48
019-920-044 $175.48
019-920-045 $175.48
019-920-046 $175.48
019-920-047 $175.48
019-920-048 $175.48
019-920-049 $175.48
019-920-050 $175.48
019-920-051 $175.48
019-920-052 $175.48
019-920-053 $175.48
019-920-054 $175.48
019-920-055 $175.48
019-920-056 $175.48
019-920-057 $175.48
019-920-058 $175.48
019-920-059 $175.48
019-920-060 $175.48
019-920-061 $175.48
019-920-062 $175.48
019-920-063 $175.48
019-920-064 $175.48
019-920-065 $175.48
019-920-066 $175.48
019-920-067 $175.48
019-920-068 $175.48
019-920-069 $175.48
019-920-070 $175.48
019-920-071 $175.48
019-920-072 $175.48
019-920-073 $175.48
019-920-074 $175.48
019-920-075 $175.48
019-920-076 $175.48
019-920-077 $175.48
019-920-078 $175.48
019-920-079 $175.48
019-920-080 $175.48
019-920-081 $175.48
019-920-082 $175.48
019-920-083 $175.48
019-920-084 $175.48
019-920-085 $175.48
019-920-086 $175.48
019-920-087 $175.48
019-920-088 $175.48
019-920-089 $175.48
019-920-090 $175.48
019-920-091 $175.48
019-920-092 $175.48
019-920-093 $175.48
019-920-094 $175.48
019-920-095 $175.48
019-920-096 $175.48
019-920-097 $175.48
019-920-098 $175.48
019-930-001 $305.86
019-930-002 $194.08
Assessor's
Parcel No.

Assessment
Amount
019-940-001 $175.48
019-940-002 $175.48
019-940-003 $175.48
019-940-004 $175.48
019-940-005 $175.48
019-940-006 $175.48
019-940-007 $175.48
019-940-008 $175.48
019-940-009 $175.48
019-940-010 $175.48
019-940-011 $175.48
019-940-012 $175.48
019-940-013 $175.48
019-940-014 $175.48
019-940-015 $175.48
019-940-016 $175.48
019-940-017 $175.48
019-940-018 $175.48
019-940-024 $175.48
019-940-025 $175.48
019-940-026 $175.48
019-940-027 $175.48
019-940-028 $175.48
019-940-029 $175.48
019-940-030 $175.48
019-940-031 $175.48
019-940-032 $175.48
019-940-033 $175.48
019-940-034 $175.48
019-940-035 $175.48
019-940-036 $175.48
019-940-037 $175.48
019-940-038 $175.48
019-940-039 $175.48
019-940-040 $175.48
019-940-041 $175.48
019-940-042 $175.48
019-940-043 $175.48
019-940-044 $175.48
019-940-045 $175.48
019-940-046 $175.48
019-940-047 $175.48
019-940-048 $175.48
019-940-052 $175.48
019-940-053 $175.48
019-940-054 $175.48
019-940-055 $175.48
019-940-056 $175.48
Totals: 21,468 $4,044,533.88
- 90 - 04/15/26

CITY COUNCIL AGENDA ITEM NO. G.5
5/26/2026
SUBJECT: Hold a Public Hearing to Review and Receive Public Input on the Urban Water Management Plan and the Water Shortage
Contingency Plan
DEPARTMENT: Public Works
STAFF: Casey Wichert, Director of Public Works
James Wolfe, Water Operations Manager

TITLE/RECOMMENDATION
Hold a public hearing to allow the public input and City Council to provide direction on proposed updates to the 2025 Water Shortage Contingency Plan (“WSCP”) and the 2025 Urban Water Management Plan (“UWMP”) for submittal to the California Department of Water Resources (“DWR”).

FISCAL IMPACT
The cost to prepare the 2025 UWMP and WSCP was $95,538 and is included in the FY 2025/26 Water Enterprise Operating Budget.

BACKGROUND
Urban Water Management Plans are prepared by California’s urban water suppliers to support long-term resource planning and ensure adequate water supplies are available to meet existing and future water demands. As required by the Urban Water Management Planning Act of 1983 (Act) (described in California Water Code (CWC) Division 6, Part 2.55 and Part 2.6, Section 10608 and Sections 10610 - 10656), every urban water supplier providing water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually is required to adopt and submit a UWMP every five years to the California Department of Water Resources (DWR). The Act describes the contents of the UWMP as well as how urban water suppliers should adopt and implement the UWMP.

The UWMP must be submitted to the DWR by July 1, 2026, and must incorporate the WSCP. The UWMP and WSCP must be treated as separate plans for the public hearing and adoption procedures.

The draft 2025 UWMP and WSCP have been posted on the City’s website at the following link: www.brentwoodca.gov/UWMP and notifications have been sent to

CITY COUNCIL AGENDA ITEM NO. G.5
5/26/2026
stakeholders advising that the documents are available to review. In accordance with Government Code 6066, a public hearing notice was published on May 8 and May 15.

This public hearing is being held to receive public input and City Council direction on the draft UWMP and WSCP. The City Council will consider comments received during the public review process and public hearing before staff brings the plans back to the City Council for consideration of adoption.

CITY COUNCIL STRATEGIC INITIATIVE
Focus Area 1, Goal 2.a - Water, Wastewater and Solid Waste Services: Provide safe and sustainable water, wastewater and solid waste services for the build-out of the City per the City’s General Plan.

PREVIOUS ACTION
Previous Action by the City Council is included on Attachment 1.

DATE OF NOTICE
May 8, 2026
May 15, 2026

ENVIRONMENTAL DETERMINATION
Not Applicable.

ALTERNATIVE OPTION(S)
Not Applicable.

ATTACHMENT(S)

1. Previous Action

2. 2025 Urban Water Management Plan

3. 2025 Water Shortage Contingency Plan

PREVIOUS ACTION
Previous actions related to this agenda item that were taken by the Council are listed below. To view prior actions and materials, and Brentwood Municipal Code references in the staff report, as applicable:
 Visit www.brentwoodca.gov/meetings, and select the meeting date(s) desired to see the reference materials and videos.
 Visit www.brentwoodca.gov/municipalcode to research references to the Brentwood Municipal Code and search by the code section(s) cited.

On August 14, 2001, by Resolution No. 2341, the City Council adopted the 2000 Urban Water Management Plan as submitted by Brown and Caldwell, Environmental Engineers and Consultants.

On January 10, 2006, by Resolution No. 2006-6, the City Council adopted the 2005 Urban Water Management Plan as submitted by Brown and Caldwell, Environmental Engineers and Consultants.

On May 24, 2011, by Resolution No. 2011-75, the City Council adopted the 2010 Urban Water Management Plan as submitted by ICF Jones and Stokes International, Engineering Consultants.

On May 24, 2016, by Resolution No. 2016-71, the City Council adopted the draft 2015 Urban Water Management Plan for submittal to the California Department of Water Resources as prepared by City staff and Brown and Caldwell, Engineering Consultants.

On May 25, 2021, by Resolution No.’s 2021-57, 2021-56, the City Council adopted the Water Shortage Contingency Plan and the 2020 Urban Water Management Plan for submittal to the California Department of Water Resources as submitted by Brown and Caldwell, Environmental Engineers and Consultants.

May 6, 2026
Draft 2025
Urban Water
Management Plan

PREPARED FOR CITY OF BRENTWOOD

2025 Urban Water
Management Plan
Prepared for
City of Brentwood
Brentwood, CA
May 6, 2026

201 North Civic Drive, Suite 300
Walnut Creek, CA 94596
2025 Urban Water Management Plan
Prepared for
City of Brentwood
Brentwood, CA
May 6, 2026
203886
This is a draft and is not intended to be a final representation of the work done or recommendations made by Brown and Caldwell.

It should not be relied upon; consult the final report.

May 6, 2026
Mr. James Wolfe
Water Operations Manager
Public Works
City of Brentwood
2201 Elkins Way
Brentwood, California 94513-7344 203886
Subject: 2025 Urban Water Management Plan
Dear Mr. Wolfe,
We are pleased to submit this Draft 2025 UWMP. We have updated your 2020 UWMP to incorporate more recent data and information related to water demands, water supply and reliability, water use efficiency, and water shortage contingency planning.

Please let me know if you have any questions.

Very truly yours,
Brown and Caldwell
John Abrew, P.E.

Project Manager
Melanie Holton, P.E.

Technical Lead
Enclosure: Draft 2025 Urban Water Management Plan for the City of Brentwood

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Project Participants
City of Brentwood
James Wolfe
Lindsey Ray
Casey Wichert
Brown and Caldwell
John Abrew
Melanie Holton
Timothy Lee
Nicholas Roby
Antonio Blair
Kaitlyn Allen

2025 Urban Water Management Plan Project Participation
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Table of Contents
List of Figures.............................................................................................................................................. vi List of Tables ............................................................................................................................................... vi

1. Introduction.........................................................................................................................................1-1

1.1 Urban Water Management Planning Act...............................................................................1-1

1.2 UWMP Summary Lay Description ..........................................................................................1-1

1.3 Plan Organization....................................................................................................................1-2

2. Plan Preparation.................................................................................................................................2-1

2.1 Basis for Preparing the UWMP...............................................................................................2-1

2.2 Coordination and Outreach....................................................................................................2-2

3. System Description.............................................................................................................................3-3

3.1 Description of Service Area....................................................................................................3-3

3.2 Service Area Climate ..............................................................................................................3-3

3.3 Effects of Climate Change......................................................................................................3-4

3.3.1 Regional Planning.....................................................................................................3-4

3.3.2 Local Planning Context.............................................................................................3-5

3.3.3 Impacts on Water Demand......................................................................................3-5

3.3.4 Impacts on Water Supply.........................................................................................3-6

3.4 Service Area Population and Demographics.........................................................................3-7

3.4.1 Service Area Population...........................................................................................3-8

3.4.2 Other Social, Economic, and Demographic Factors............................................ 3-10

3.4.3 Land Uses within Service Area ............................................................................. 3-10

4. System Water Use ..............................................................................................................................4-1

4.1 Water Use by Sector ...............................................................................................................4-1

4.2 Historical Retail Water Demand ............................................................................................4-3

4.3 Distribution System Water Loss.............................................................................................4-4

4.3.1 Historical Water Loss ...............................................................................................4-5

4.3.2 Water Loss Standard................................................................................................4-6

4.4 Estimated Future Water Savings ...........................................................................................4-8

4.4.1 Active Conservation Program Savings.....................................................................4-8

4.4.2 Passive Water Savings.............................................................................................4-8

4.5 Projected Water Demand.......................................................................................................4-9

4.5.1 Per Capita Water Demand .................................................................................... 4-10

4.6 Per Capita Water Demand Target Compliance .................................................................. 4-11

4.7 Water Use for Lower Income Households.......................................................................... 4-12

5. Water Supplies ...................................................................................................................................5-1

5.1 Surface Water.........................................................................................................................5-1

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5.1.1 ECCID Surface Water Treated at RBWTP................................................................5-1

5.1.2 ECCID Surface Water Treated at COBWTP..............................................................5-1

5.1.3 Surface Water Quality ..............................................................................................5-1

5.2 Purchased or Imported Water................................................................................................5-2

5.3 Groundwater ...........................................................................................................................5-2

5.3.1 Basin Description .....................................................................................................5-2

5.3.2 Groundwater Quality.................................................................................................5-5

5.3.3 Groundwater Management......................................................................................5-5

5.3.4 Historical Groundwater Pumping.............................................................................5-6

5.4 Stormwater..............................................................................................................................5-6

5.5 Wastewater and Recycled Water...........................................................................................5-7

5.5.1 Recycled Water Coordination ..................................................................................5-7

5.5.2 Wastewater Collection, Treatment, and Disposal ..................................................5-7

5.5.3 Recycled Water System......................................................................................... 5-10

5.5.4 Recycled Water Beneficial Uses ........................................................................... 5-10

5.5.5 Actions to Encourage and Optimize Future Recycled Water Use ....................... 5-12

5.6 Desalinated Water Opportunities ....................................................................................... 5-13

5.7 Exchanges or Transfers....................................................................................................... 5-13

5.8 Future Water Supply Projects ............................................................................................. 5-14

5.9 Summary of Existing and Planned Sources of Water........................................................ 5-14

5.10 Energy Intensity.................................................................................................................... 5-17

6. Water Supply Reliability Assessment................................................................................................6-1

6.1 Constraints on Water Sources ...............................................................................................6-1

6.1.1 Constraints on Surface Water Sources...................................................................6-3

6.1.2 Constraints on Groundwater Sources .....................................................................6-3

6.2 Reliability by Type of Year.......................................................................................................6-4

6.3 Supply and Demand Comparison..........................................................................................6-5

6.4 Water Supply Reliability Management Tools and Options ...................................................6-8

6.5 Drought Risk Assessment ......................................................................................................6-9

6.5.1 City Actions................................................................................................................6-9

6.5.2 Basis for Water Shortage Condition........................................................................6-9

6.5.3 DRA Water Source Reliability................................................................................ 6-10

6.5.4 Total Water Supply and Use Comparison ............................................................ 6-10

7. Water Shortage Contingency Planning..............................................................................................7-1

7.1 Water Supply Reliability Analysis ...........................................................................................7-1

7.1.1 Water System Reliability ..........................................................................................7-1

7.1.2 Key Issues to Potential Shortage Condition ...........................................................7-2

7.2 Annual Water Supply and Demand Assessment Procedures ..............................................7-2

7.2.1 Evaluation Criteria....................................................................................................7-3

7.2.2 Decision Making Process.........................................................................................7-3

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7.3 Six Standard Water Shortage Stages ....................................................................................7-4

7.4 Shortage Response Actions ...................................................................................................7-5

7.4.1 Demand Reduction Actions .....................................................................................7-6

7.4.2 Supply Augmentation and Other Actions ................................................................7-8

7.4.3 Special Water Feature Distinction...........................................................................7-9

7.5 Emergency Response Plan.....................................................................................................7-9

7.6 Seismic Risk Assessment and Mitigation Plan.................................................................. 7-10

7.7 Communication Protocols ................................................................................................... 7-12

7.8 Compliance and Enforcement ............................................................................................ 7-12

7.9 Legal Authorities .................................................................................................................. 7-13

7.10 Financial Consequences of WSCP...................................................................................... 7-14

7.10.1 Potential Revenue Reductions and Expense Increases ..................................... 7-14

7.10.2 Mitigation Actions.................................................................................................. 7-14

7.10.3 Cost of Compliance ............................................................................................... 7-14

7.11 Monitoring and Reporting ................................................................................................... 7-14

7.12 WSCP Refinement, Adoption, Submittal, and Availability ................................................. 7-15

7.12.1 Refinement Procedures ........................................................................................ 7-15

7.12.2 Adoption, Submittal, and Availability.................................................................... 7-15

8. Demand Management Measures......................................................................................................8-1

8.1 Conservation Program Implementation ................................................................................8-1

8.1.1 Water Waste Prevention Ordinances ......................................................................8-2

8.1.2 Metering....................................................................................................................8-3

8.1.3 Conservation Pricing ................................................................................................8-3

8.1.4 Public Education and Outreach...............................................................................8-3

8.1.5 Programs to Assess and Manage Distribution System Real Loss.........................8-4

8.1.6 Water Conservation Program Coordination and Staffing Support ........................8-4

8.1.7 Other Demand Management Measures .................................................................8-4

9. Plan Adoption, Submittal, and Implementation................................................................................9-1

9.1 Inclusion of all 2025 Data......................................................................................................9-1

9.2 Notice of Public Hearing.........................................................................................................9-1

9.3 Public Hearing and Adoption..................................................................................................9-2

9.4 Plan Submittal and Public Availability ...................................................................................9-2

9.5 Plan Implementation ..............................................................................................................9-3

9.6 Amending an Adopted UWMP................................................................................................9-3

10. References............................................................................................................................. 10-1 Appendix A: DWR Urban Water Management Plan Checklist....................................................................A Appendix B: Documentation of City/County Notification...........................................................................B Appendix C: Distribution System Water Loss Audit....................................................................................C Appendix D: Second Amendatory Agreement Between CCWD and the City ............................................D

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Appendix E: Reduced Delta Reliance Reporting ........................................................................................E Appendix F: Water Waste Ordinance .......................................................................................................... F Appendix G: Emergency Response Plan (Cover and Table of Contents).................................................G Appendix H: Contra Costa Hazard Mitigation Plan (Cover and Table of Contents)..................................H Appendix I: Model Water Efficient Landscape Ordinance and Municipal Landscape and Screening..... I Appendix J: Current Water Rate Table.........................................................................................................J Appendix K: Notice of Public Hearing .........................................................................................................K Appendix L: Adoption Resolution and Notice of Public Availability ........................................................... L Appendix M: Planned Future Development Demands..............................................................................M Appendix N: Demand Reduction Actions Calculations ..............................................................................N List of Figures
Figure 3-1. Planned future anticipated developments...........................................................................3-9 Figure 4-1. 2025 City potable and non-potable demand by water use sector .....................................4-2 Figure 4-2. Historical water demand .......................................................................................................4-3 Figure 4-3. Revenue and NRW components...........................................................................................4-4 Figure 4-4. Historical water losses...........................................................................................................4-5 Figure 4-5. City per capita water demand ............................................................................................ 4-11 Figure 5-1. ECC county subbasin, GSAs and adjacent subbasins .........................................................5-4 Figure 7-1. Annual assessment procedure and decision making process ...........................................7-3 List of Tables
Table 2-1. Public Water Systems (DWR Table 2-1).................................................................................2-1 Table 2-2. Plan Identification (DWR Table 2-2).......................................................................................2-1 Table 2-3. Supplier Identification (DWR Table 2-3) ................................................................................2-1 Table 2-4. Water Supplier Information Exchange, Water Code Section 10631(h) (DWR Table 2-4) ..2-2 Table 2-5. Coordination with Appropriate Agencies................................................................................2-2 Table 3-1. City Service Area Climate Characteristics..............................................................................3-4 Table 3-2. Population - Current and Projected, Water Code Section 10631(a) (DWR Table 3-1).......3-8 Table 4-1. Demands for Potable and Non-Potable Water – Actual, Water Code Section 10631(d)(1) (DWR Table 4-1) .................................................................................................................................4-1 Table 4-2. Water Loss Audit Reporting, Water Code Section 10631(d)(3)(A) (DWR Table 4-5) ..........4-6 Table 4-3. Progress Towards 2028 Water Loss Standard, Water Code Section 10631(d)(3)(C) (DWR Table 4-6) .................................................................................................................................4-7

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Table 4-4. Passive Water Savings Projections, AF, Water Code Section 10631(d)(4)(A) (DWR Table 4-4) .................................................................................................................................4-9 Table 4-5. Retail: Demands for Potable– Projected, Water Code Section 10631(d)(1) (DWR Table 4-2) .............................................................................................................................. 4-10 Table 4-6. SB x7-7 2020 Target Progress, Water Code Section 10608.40 – North Davis Meadows (DWR Table 5-1) ............................................................................................................. 4-11 Table 4-7. Inclusion in Water Use Projections, Water Code Section 10631(a), 10631(d)(4)(A), and 10631(d)(4)(B) (DWR Table 4-3) ............................................................................................ 4-12 Table 5-1. Retail: Groundwater Volume Pumped, Water Code Section 10631(4) and 10631(4)(c) (DWR Table 6-1) .................................................................................................................................5-6 Table 5-2. Wastewater Collected Within Service Area in 2025, Water Code Section 10633(a) (DWR Table 6-2) .................................................................................................................................5-7 Table 5-3. Retail: Wastewater Treatment and Discharge within Service Area in 2025, Water Code Section 10633(a) (DWR Table 6-3)...................................................................................................5-9 Table 5-4. Recycled Water Direct Beneficial uses within Service Area, Water Code Section 10633 (c)(e) (DWR Table 6-4)..................................................................................................................... 5-11 Table 5-5. 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual, Water Code Section 10633 (e) (DWR Table 6-5)............................................................................................... 5-12 Table 5-6. Methods to Expand Future Recycled Water Use, Water Code Section 10633 (f) (DWR Table 6-6) .............................................................................................................................. 5-13 Table 5-7. Expected Future Water Supply Projects or Programs, Water Code Section 10631 (f) (DWR Table 6-7) .............................................................................................................................. 5-14 Table 5-8. Water Supplies – Actual, Water Code Section 10631 (b) (DWR Table 6-8)..................... 5-15 Table 5-9. Water Supplies – Projected, Water Code Section 10631 (b) (DWR Table 6-9) ............... 5-16 Table 5-10. Energy Intensity – Multiple Water Delivery Products (DWR Table O-1C)........................ 5-17 Table 5-11. Energy Intensity – Multiple Water Delivery Products (DWR Table O-1C)........................ 5-18 Table 5-12. Energy Intensity – Wastewater & Recycled Water (DWR Table O-2).............................. 5-18 Table 6-1. Factors Affecting Water Supply ..............................................................................................6-2 Table 6-2. Bases of Water Year Data (Reliability Assessment) (DWR Table 7-1) - Surface Water (ECCID) ................................................................................................................................................6-4 Table 6-3. Bases of Water Year Data (Reliability Assessment) (DWR Table 7-1) - Groundwater ........6-5 Table 6-4. Normal Year Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-2) .................................................................................................................................6-6 Table 6-5. Single Dry Year Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-3) .................................................................................................................................6-6 Table 6-6. Multiple Dry Years Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-4) .................................................................................................................................6-7 Table 6-7. DRA Water Source Reliability .............................................................................................. 6-10 Table 6-8. 5-Year DRA, Water Code Section 10635 (b)(3) (DWR Table 7-5) ..................................... 6-11

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Table 7-1. Cross-reference for Standard vs Supplier Shortage Levels, Water Code Section 10632(a)(3)(B) (DWR Table 8-1).......................................................................................................7-5 Table 7-2. Summary of Demand Reduction, Supply Augmentation, and Other Actions in WSCP by Shortage Level....................................................................................................................................7-5 Table 7-3. Demand Reduction Actions, Water Code Section 10632(a)(4)(B) and (E) (DWR Table 8-3) .................................................................................................................................7-7 Table 7-4. Supply Augmentation and Other Actions, Water Code Section 10632(a)(4)(A),(C), and (E) (DWR Table 8-2)............................................................................................................................7-9 Table 7-5. Possible Catastrophes ......................................................................................................... 7-10 Table 7-6. Potential Actions in Response to Catastrophes................................................................. 7-10 Table 7-7. Penalties and Charges......................................................................................................... 7-13 Table 8-1. Extent and Nature of DMM Implementation over the Past Five Years ................................8-2 Table 9-1. Notification to Cities and Counties, Water Code Section 10621(b) and 10642 (DWR Table 10-1)...............................................................................................................................9-2

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List of Abbreviations
AB Assembly Bill
Act Urban Water Management Planning Act of
1983
AF acre-feet
AFY acre-feet per year
ART Adapting to Rising Tides
AWIA America’s Water Infrastructure Act of
2018
AWWA American Water Works Association
CalWEP California Water Efficiency Partnership
CASGEM California Statewide Groundwater
Elevation Monitoring
CCWD Contra Costa Water District
CII commercial, industrial, and institutional
CIMIS California Irrigation Management
Information System
City City of Brentwood
COBWTP City of Brentwood Water Treatment Plant
CWC California Water Code
CWS community water system
DMM Demand Management Measure
DRA Drought Risk Assessment
DWR California Department of Water Resources
ECC East Contra Costa
ECCID East Contra Costa Irrigation District
ERP Emergency Response Plan
ETo evapotranspiration
ºF degrees Fahrenheit
GPCD gallons per capita per day
GSA Groundwater Sustainability Agency
GSP Groundwater Sustainability Plan
HMP hazard mitigation plan
HOA homeowners’ association
IRWMP Integrated Regional Water Management
Plan
IPR indirect potable reuse
kWh kilowatt hours
MCL maximum contaminant level
mgd million gallons per day
mg/L milligrams per liter
MGY million gallons per year
MIB methylisoborneol
MOU memorandum of understanding
MWELO Model Water Efficient Landscape
Ordinance
N/A not available
NRW non-revenue water
OPC Ocean Protection Council
RBWTP Randall Bold Water Treatment Plant
RRA Risk and Resilience Assessment
RWPS Recycled Water Pump Station Flow and
Capacity
RWQCB Regional Water Quality Control Board
SB Senate Bill
SGMA Sustainable Groundwater Management
Act
SWRCB State Water Resources Control Board
TDS total dissolved solids
µg/L micrograms per liter
UWMP Urban Water Management Plan
WET Water Education for Teachers
WR P1 Reduce Reliance on the Delta Through
Improved Regional Water Self-Reliance
WSCP Water Shortage Contingency Plan
WWTP wastewater treatment plant
WTP water treatment plant

2025 Urban Water Management Plan Table of Contents
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Section 1
Introduction
This Urban Water Management Plan (UWMP) for the City of Brentwood (City) includes a description of the water supply sources, historical and projected water use, and a comparison of water supply water demands during normal, single-dry, and multiple-dry years. It also includes a summary of water conservation and the updated Water Shortage Contingency Plan (WSCP). This 2025 UWMP is required by the Urban Water Management Planning Act of 1983 (Act).

The remainder of this section provides an overview of the Act, a UWMP summary lay description, and the UWMP organization.

This section provides an overview of the UWMP, the basis for preparing this UWMP, plan implementation, and organization. To aid the reader in understanding the context of the UWMP content, text at the beginning of some sections and subsections in this UWMP is italicized quoting specific portions of the Act that are relevant to the particular UWMP sections.

1.1 Urban Water Management Planning Act
The UWMP was prepared in accordance with the Act, as defined by the California Water Code (CWC), Division 6, Part 2.6, and Sections 10610 through 10657. The Act became part of the CWC with the passage of Assembly Bill (AB) 797 during the 1983-1984 regular session of the California legislature. The Act requires every urban water supplier providing water for municipal purposes to more than 3,000 connections or supplying more than 3,000 acre-feet (AF) of water annually to adopt and submit a UWMP every five years to the California Department of Water Resources (DWR). The Act was amended several times. The Act describes the regulatory contents of the UWMP and how urban water suppliers should adopt and implement the UWMP.

A new component of this 2025 UWMP includes a comparison of water loss in the current reporting period to the 2028 standard.

1.2 UWMP Summary Lay Description
“Each plan shall include a simple lay description of how much water the agency has on a reliable basis, how much it needs for the foreseeable future, what the agency’s strategy is for meeting its water needs, the challenges facing the agency, and any other information necessary to provide a general understanding of the agency’s plan” (CWC §§ 10630.5).

The City lies in Eastern Contra Costa County and is bounded to the north by the City of Oakley, to the west by the City of Antioch, and to the south and east by unincorporated portions of Contra Costa County. The City has cool, humid winters, and hot, dry summers. The City is predominantly residential with some commercial and recreational areas. While agriculture remains important to the local economy it has declined in area as the City has become more suburban.

The City’s water use is projected to increase based on anticipated future development within the current service area. Projected potable demand within the service area is estimated to reach approximately 12,529 acre-feet per year (AFY) by 2050. The projected water demands consider the City’s on-going water conservation program, increased outdoor demands due to climate change, as well as estimations of future reductions in water use due to changing building codes and water efficient policies.

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The City’s per capital water use is projected to remain below pre-2013-2015 drought levels. The City met it’s Senate Bill (SB) x7-7 2020 per capita water use target that was updated in the 2015 UWMP.

With increased water conservation, continued development of the City’s recycled water program, and water loss control efforts to meet the anticipated State standards, overall per capita demand is expected to remain below the water use target into the future.

The City’s water supply consists of both surface water from the Delta through a permanent entitlement with East Contra Costa Irrigation District (ECCID), groundwater supply from the local groundwater basin, and recycled water. The surface water supply from ECCID has pre-1914 water rights, which historically have not been subject to delivery reductions during water shortages, including regulatory restricted and drought years. The City has always met system water demand, regardless of regional hydrology. The City expects no reductions from normal‐year supply during single or multiple dry years and thus does not project any water supply shortages into the future.

1.3 Plan Organization
DWR provides a UWMP guidebook to aid urban water suppliers in meeting the requirements of the Act. There are tables specified in the DWR UWMP guidebook that must be included in the UWMP document. The DWR UWMP guidebook tables are identified in this UWMP following each table title (i.e. (DWR Table 2-1)). If a table title in this document is not followed by a DWR table in parenthesis then that table is not explicitly required by DWR.

DWR has provided a checklist of the items that must be addressed in the 2025 UWMP based upon the Act. This checklist identifies where in the UWMP each item has been addressed. The checklist is completed for this UWMP and is provided in Appendix A. It references the sections in this UWMP where specific items can be found.

Below is a summary of the sections in this UWMP.
• Section 1 (this section) provides an overview of the Act, a summary of the sections in this UWMP, and a UWMP summary lay description.
• Section 2 summarizes the development process for this UWMP, including coordination and outreach.
• Section 3 provides a description of the service area, climate, and historical and projected population.
• Section 4 presents historical and projected water demands. • Section 5 describes water supplies including recycled water. • Section 6 describes water supply reliability and drought risk assessment (DRA). • Section 7 describes the City’s WSCP.
• Section 8 summarizes the City’s demand management measures (DMM). • Section 9 documents the approach undertaken to make this UWMP publicly available. • Section 10 provides a list of references.
• Appendices provide relevant supporting documents.

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Section 2
Plan Preparation
This section presents the basis for preparing the UWMP, UWMP identification number, units of measure, and coordination and outreach efforts.

2.1 Basis for Preparing the UWMP
The City is a retail urban water supplier. Table 2-1 presents the public water system name and number as well as the number of connections and amount of water supplied in 2025.

Table 2-1. Public Water Systems (DWR Table 2-1)
Has there been a change in the number of affiliated Public Water Systems since the 2020 UWMP? (opt) No
Public water system
number
Public water system
name
Number of municipal
connections 2025
Volume of water supplied
2025
Acre-feet (AF)
CA0710004 City of Brentwood 22,506 12,169a
a. Total volume of water supplied includes 1,445 AF of recycled water (non-potable) and 10,724 AF from potable sources.

The City has selected individual reporting for this UWMP, as identified in Table 2-2. This UWMP is reporting on a calendar year basis using AF as the unit of measure as noted in Table 2-3.

Table 2-2. Plan Identification (DWR Table 2-2)
Select One or Both Type of Plan
 Individual UWMP
Water supplier is also a member of a SBx7-7 Regional Alliance Regional UWMP
Table 2-3. Supplier Identification (DWR Table 2-3)
Type of supplier (select one or both)
Supplier is a wholesale supplier
 Supplier is a retailersupplier
Fiscal or Calendar Year (select one)
 UWMP Tables are in calendar years
UWMP Tables are in fiscal years
Units of Measure Used in UWMP (Select from the drop down list).

Unit acre-feet (AF)

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2.2 Coordination and Outreach
“Each urban water supplier shall coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies to the extent practicable. […] Each urban water suppler shall encourage the active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of its plan” (CWC §§ 10620(d)(2)–10642).

The Act requires the City to coordinate the preparation of its UWMP with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable. The City does not have a wholesaler supplier, as shown in Table 2-4.

Table 2-4. Water Supplier Information Exchange, Water Code Section 10631(h) (DWR Table 2-4) The retail supplier has informed the following wholesale supplier(s) of projected water use in accordance with Water Code Section 10631 (h).

Wholesaler Water Supplier Name:
--a
a. The City does not have a wholesale supplier
The City has also coordinated this UWMP with other agencies and community as summarized in Table 2-5. Communication with other agencies is provided in Appendix B.

Table 2-5. Coordination with Appropriate Agencies
Organization/
Agency Name
Noticed of
UWMP
update
prior to
public
hearing
Was sent a
link or copy
of the draft
UWMP
Was sent a
link or copy
of the final
UWMP
Participated
in
Developing
the UWMP
Commented
on the Draft
Attended
Public
Meetings
Was
Contacted
for
Assistance
Was sent a
Notice of
Intention to
Adopt
City of Antioch X
Byron-Bethany
Irrigation
District
X
CCWD X
County
Supervisors
Office
X
Diablo Water
District X

ECCID X
Town of
Discovery Bay X
General public X

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Section 3
System Description
This section describes the City’s service area. It contains a description of factors that impact water demand such as climate, climate change, population growth, and land use. “Describe the service area of the supplier. including current and projected population, climate, and other social, economic, and demographic factors affecting the supplier’s water management planning.” (CWC §§ 10631(a)).

3.1 Description of Service Area
“Describe the service area of the supplier” (CWC §§ 10631(a)).

The City lies in Eastern Contra Costa County and is bounded to the north by the City of Oakley, to the west by the City of Antioch, and to the south and east by unincorporated portions of Contra Costa County. The City was incorporated in 1948. Its incorporated boundary currently totals 14.8 square miles (9,502 acres), with a sphere of influence totaling 17.4 square miles (11,129 acres) (City of Brentwood, 2025).

Local development began in the late 19th century. The area that would eventually become the City began as a farming community that is still today known throughout the Bay Area for its agricultural products, primarily its cherries, corn, and peaches. Since 1990, many of the old farms and orchards have been replaced by suburban developments. The predominant land use is now residential with the majority of residential development being single family housing. Concurrent with the housing boom of the early and mid-2000’s, the City experienced a substantial increase in retail services uses, as well as moderate growth in the light industrial sector (City of Brentwood, 2013a).

3.2 Service Area Climate
“[Describe the service area] climate” (CWC §§ 10631(a)).

The City has cool, humid winters, and hot, dry summers. Historical climate data for the City were obtained from the California Irrigation Management Information System (CIMIS). Based on the historical data obtained from CIMIS, the City’s average daily temperature ranges from 37 to 92 degrees Fahrenheit (ºF); the extreme low and high temperatures have been 11 and 113ºF, respectively over the time period January 1986 to October 2025 (DWR, 2025). The rainy season typically begins in November and ends in March.

Average monthly precipitation during the winter months is about two inches, but records show that the monthly winter precipitation has been as high as eight inches (in February 1998) and as low as zero inches (multiple months). Water demands during the winter are low relative to summer months (May to September). The combination of hot and dry weather during the summer results in high water demands during these periods. Landscape irrigation, including turf irrigation in the summer, significantly contributes to the higher summer demands. Evapotranspiration (ETo) records, which measure the loss of water from the soil both by evaporation and by transpiration from the plants growing thereon, indicate average monthly values ranging from 1.2 inches in the City’s wet Januarys to 8.4 inches in much drier Julys. Table 3-1 summarizes the City’s average climate conditions.

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Table 3-1. City Service Area Climate Characteristics
Month Standard Monthly
Average ETo (inches)
Average Total Rainfall
(inches)
Average Temperature (°F)
Max Min
January 1.22 2.36 56.87 38.93
February 2.09 2.17 62.38 41.63
March 3.77 1.43 67.22 44.52
April 5.49 0.76 72.74 46.60
May 7.23 0.52 79.21 50.43
June 8.09 0.29 86.59 54.78
July 8.41 0.16 91.62 56.64
August 7.38 0.16 91.02 56.06
September 5.78 0.25 87.03 54.37
October 4.02 0.71 78.32 49.16
November 2.03 1.10 65.59 41.95
December 1.24 2.37 56.18 37.81
Note: Period of record is January 1986 to October 2025 from Brentwood CIMIS Station 47, CIMIS www.cimis.water.ca.gov.

3.3 Effects of Climate Change
“It is the intention of the Legislature, in enacting this part, to permit levels of water management planning … while accounting for impacts from climate change” (CWC §§ 10630).

Climate change is projected to alter hydrologic conditions, water‐use patterns, and water-supply reliability throughout the San Francisco Bay Area and ECC County, including the City. California’s Fourth Climate Change Assessment (Ackerly, 2018), the Cal-Adapt platform, and subsequent statewide and regional studies consistently indicate warmer temperatures, increased evapotranspiration (ETo), more variable precipitation and runoff, declining Sierra Nevada snowpack, and rising sea levels and Delta salinity. These changes introduce new risks to both the quantity and quality of available supplies with local implications for the City’s water supply, water quality, and water demands.

3.3.1 Regional Planning
California’s climate impacts are region-specific. The California Climate Change Assessment (Bedsworth et. al, 2018) framework divides the state into nine climate regions; The City lies within the San Francisco Bay Area region, with close hydrologic linkage to the Sierra Nevada region through its surface-water supply. Key sources informing this UWMP include:
• California Fourth Climate Change Assessment statewide and San Francisco Bay Area regional reports (Ackerly et. al, 2018)
• Cal-Adapt 3.0 tools and datasets (temperature, precipitation, ETo, and sea level rise) • ECC County Integrated Regional Water Management Plan (IRWMP) Update (ECCC, 2019) and Adapting to Rising Tides (ART) ECC Project (ART BCDC, 2020) • Delta Stewardship Council’s Delta Adapts climate vulnerability (Delta Stewardship Council, 2021a) and water-supply technical memoranda (Delta Stewardship Council, 2021b) • State sea-level rise guidance prepared by the California Ocean Protection Council (OPC, 2024) and related statewide summaries of projected climate impacts.

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Across these studies, there is broad agreement that, even under scenarios with global greenhouse gas emissions reductions, the Bay Area and Delta will experience:
• Continued warming and higher evaporative demand
• Little change in long-term average annual precipitation, but substantial changes in the timing and intensity of storms (“hydroclimate whiplash”)
• Declining Sierra Nevada snowpack, earlier runoff, and greater interannual storage stress; • Rising sea levels driving more frequent and severe salinity intrusion in the Delta • Increasing occurrence of compound hazards (e.g., extreme heat plus drought, or atmosphericriver flooding coincident with high tides and elevated sea level).

3.3.2 Local Planning Context
The regional climate stressors summarized above are expected to affect the City’s water demands and water supplies. The City’s climate hazards and water-resource vulnerabilities are further detailed in the City of Brentwood Climate Vulnerability Assessment (Brentwood, 2024a) prepared in support of the Contra Costa County 2024 Hazard Mitigation Plan.

The City’s Climate Vulnerability Assessment and the Contra Costa County Climate Action and Adaptation Plan (Contra Costa County, 2024) identify several climate hazards with direct implications for water supply related to the following:
• Higher temperatures and more frequent heat waves increase peak water demands, particularly for outdoor irrigation, cooling, and firefighting flows, • Prolonged droughts increase reliance on groundwater and heighten sensitivity to Delta salinity and quality events.
• Wildfire in upstream watersheds can alter runoff patterns, increase sediment and nutrient loads, and degrade source-water quality feeding Delta-conveyed supplies.

3.3.3 Impacts on Water Demand
Cal-Adapt projections and the California Fourth Climate Change Assessment indicate that by midcentury (2040–2069), annual average temperatures in the Bay Area are expected to increase by approximately 2.0–4.3°C (3.6–7.7°F), with inland valleys such as ECC County warming toward the upper end of that range. Higher air temperatures translate directly into increased reference ETo:
• Cal-Adapt ETo projections for inland ECC microclimates indicate mid-century ETo increases on the order of 5 to 12 percent, depending on emissions scenario and time slice • Warmer nighttime temperatures and increased frequency, duration, and intensity of heat waves further elevate peak ETo and can lengthen the effective irrigation season, shifting the onset of landscape irrigation earlier in spring and extending it later into fall.

For the City’s water system customers, these changes imply:
• Increased outdoor urban water demands (single-family, multi-family, and dedicated irrigation accounts)
• Higher agricultural and open-space irrigation requirements in the broader ECC region • Greater peak-day and peak-season demands under extreme heat events, which may stress distribution and storage systems.

For this analysis, a 5 percent increase in water demand through the planning horizon is applied to outdoor water usage to account for water demand increases due to climate change.

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3.3.4 Impacts on Water Supply
Regional climate analyses (Swain et al., 2018; Pierce et al., 2013, 2023; DWR, 2019/2020) indicate that while mean annual precipitation in Northern California may show relatively modest directional change, the character of precipitation will shift toward greater volatility and more intense extremes:
• More intense storms and atmospheric rivers. Model ensembles project substantial increases in the frequency and intensity of extreme precipitation events (e.g., events above the historical 95th percentile), largely associated with stronger atmospheric rivers. Swain et al. describe a 25– 100 percent increase in “dry-to-wet” precipitation whiplash events by late century, with a higher occurrence of historically rare storm sequences.
• Longer dry intervals and more frequent multi-year droughts. Warmer temperatures increase evaporative demand and soil moisture deficits, amplifying drought severity even when precipitation amounts change only modestly. Paleoclimate and modeling studies underscore that California’s hydroclimate is naturally volatile, and anthropogenic warming is increasing the frequency of both very dry and very wet years.
• Shift in seasonal runoff patterns. More winter precipitation will fall as rain rather than snow in the Sierra Nevada, increasing winter runoff and reducing spring and summer baseflows.

For ECC County, and particularly the City, these changes point to:
• More variable natural groundwater recharge, as intense storms generate higher runoff and less infiltration
• Greater intra- and interannual variability in surface-water deliveries • Increased flood risk along creeks, channels, and low-lying infrastructure corridors during atmospheric river events, especially under elevated sea levels in the Delta and Suisun Bay The City’s surface-water supply ultimately depends on runoff generated in the Sierra Nevada.

Multiple observational and modeling studies (e.g., Mote et al., 2018; Sun et al., 2019; Rhoades et al., 2018) show:
• Declining April 1 snowpack. Under high-emissions scenarios, April 1 snow water equivalent (SWE) in the Sierra Nevada is projected to decline by roughly 40–60 percent by late century relative to late-20th-century baselines, with mid-century declines already on the order of 20–40 percent in many basins.
• Earlier snowmelt and peak runoff. Peak snowmelt runoff is projected to shift earlier by approximately 4–6 weeks, increasing winter and early-spring flows while reducing summer and fall baseflows.
• Increased interannual storage stress. Reduced and more variable snowpack reduces the system’s natural “cold-season storage,” making reservoir operations more reliant on active management, forecasts, and expanded storage and recharge strategies.

The Sacramento–San Joaquin Delta is highly sensitive to sea level rise, altered inflows, and operational constraints. OPC’s 2024 State Sea Level Rise Guidance (OPC, 2024) indicates that, statewide, mean sea level is likely to rise approximately 0.8–1.0 feet (0.24–0.30 m) by 2050, with plausible upper-end scenarios exceeding 3–6 feet (0.9–2.0 m) by 2100 under high emissions.

The Delta Stewardship Council’s Delta Adapts initiative and related technical work (e.g., DSM2/CalSim-III modeling and salinity primers) highlight several implications:
• More frequent and prolonged salinity intrusion. Higher sea levels, combined with reduced and more variable inflows and potential levee or infrastructure damage, are projected to increase the frequency, duration, and inland extent of salinity intrusion, particularly during dry and critically dry years.

2025 Urban Water Management Plan Section 3: System Description 3-7
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. • Higher Delta water temperatures and harmful algal blooms. Rising air temperatures and reduced cold-water inflows are expected to elevate Delta water temperatures, increasing the likelihood of cyanobacterial harmful algal blooms and higher organic carbon loads. • Increased turbidity and sediment pulses. Stronger atmospheric river events can produce higher turbidity, sediment, and nutrient loads, complicating treatment and affecting conveyance and ecosystem conditions.
• Tighter environmental and operational constraints. Climate-driven habitat and species impacts (e.g., to Delta Smelt, salmonids, and estuarine ecosystems) are expected to necessitate more stringent or frequent operational restrictions to meet regulatory and biological objectives.

The 2019 ECC County IRWMP Update and ART East Contra Costa (ART BCDC, 2020) project similarly identify high-priority regional climate vulnerabilities, including:

1. Reduced seasonal reliability of surface-water supplies under extended drought and altered runoff timing;

2. Increased frequency of low-quality Delta water (higher salinity, turbidity, and organic matter), driving more complex treatment and blending needs;

3. Heightened drought-period dependence on local groundwater; and

4. More frequent flooding and storm-related stress on water, wastewater, and transportation infrastructure.

The City’s Groundwater Sustainability Plan (GSP) (ECCGSA, 2017) concludes that groundwater levels and storage are generally capable of meeting projected demands under current management assumptions, including under historical multi-year drought sequences, while also identifying climate change as a key long-term stressor.

Climate-related groundwater stressors identified in the GSP and subsequent annual reports include:
• Reduced natural recharge. Hotter, longer dry seasons and a shift toward more intense winter storms can reduce deep percolation and natural recharge, even when total annual precipitation changes are modest.
• Increased pumping during extended droughts. During multi-year droughts, reduced surfacewater availability is expected to increase reliance on groundwater, placing additional pressure on basin storage and requiring careful tracking of sustainable yield. • Potential groundwater-quality changes. Changes in recharge patterns, local land use, and pumping distributions may influence mobilization and transport of salinity and other constituents, particularly in shallow and intermediate zones.

For this analysis, no decrease in water supply through the planning horizon is assumed due to climate change.

3.4 Service Area Population and Demographics
“Describe the service area of the supplier, including current and projected population […] The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in five-year increments to 20 years or as far as data is available” (CWC §§ 10631(a)).

The following section describes current and projected population of the service area. A discussion on social, economic, and demographic factors as well as land use trends potentially affecting water management planning in the service area is also included.

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3.4.1 Service Area Population
When the City was incorporated in 1948 it had a population of 1,700. During the late 1990’s and early 2000’s its population increased significantly. These growth trends have mirrored economic trends in the City. The City underwent a dramatic economic boom from 2000 through 2008. This growth stalled in 2009, paralleling changes in the U.S. economy, particularly the real estate market collapse in California. Since then, the City has steadily grown until 2021 where the population decreased by 2.6 percent. The City’s population fluctuated in years 2023 and 2024, only averaging a growth of 1.3 percent (City of Brentwood, 2025a). In 2025, the City’s water system serves a population of 65,747 (California Department of Finance, 2026).

Table 3-2 provides the estimated 2025 population and projected future population through 2050. It is estimated that at full buildout the City limits will support a total population of 85,400. The population was calculated by estimating the future number of water system connections that will be in place at buildout for City’s current service area based on the current land use plan and known future new developments in the service area. The City’s zoning map and General Plan (De Novo Planning Group, 2014) is used to correlate the vacant parcels to their land use classification.

Buildout connections are estimated based on the density of existing connections per acre applied to the available vacant acreage by customer category.

The number of connections was then multiplied by 3.21 (people-per-connection ratio) to determine the total future population. The people-per-connection ratio is determined by the 2024 connections and population in the City’s service area. The rate of growth to buildout for connections in the existing service area are based on the historical growth rate combined with the estimated timing of future developments. Planned future anticipated developments are shown in Figure 3-1.

Table 3-2. Population - Current and Projected, Water Code Section 10631(a) (DWR Table 3-1) Population
served
2025 2030 2035 2040 2045 2050
65,747 70,877 76,007 80,253 84,499 85,400

2025 Urban Water Management Plan Section 3: System Description 3-9
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Figure 3-1. Planned future anticipated developments

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3.4.2 Other Social, Economic, and Demographic Factors
“Describe the service area of the supplier, including… other social, economic and demographic factors affecting the supplier’s water management planning.” (CWC §§ 10631).

Other socio-economic and demographic factors that affect water management planning include the uncertainty in estimating future population growth and per capita water use. Affordability of housing has many people choosing to reside in the City. Of the roughly 21,000 housing units, the City has a home ownership rate of over 76 percent (Brentwood, 2025a). Even though population and employment rates in the City continue to grow (the City has an employment rate of approximately 95 percent (City of Brentwood, 2025a), a large portion of the Brentwood residents commute to jobs outside of the City, primarily to employment opportunities in San Francisco, Oakland, Concord, Walnut Creek, Antioch, and Pittsburgh (City of Brentwood, 2013a). The largest employers within the City are community-service retail and government employers (e.g., school districts).

3.4.3 Land Uses within Service Area
“The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities…”(CWC §§ 10631(a)).

The City’s service area is predominantly residential, with supporting commercial and city land uses.

While agriculture remains part of the local economy, its relative importance has declined as the City has transitioned toward a more suburban development pattern. The City has no heavy industrial uses and only a limited light industrial area located in the northeastern portion of the service area.

Based on information provided by the City in 2025 and the General Plan land use, residential and commercial development is expected to continue through the planning horizon, with remaining developable land largely built out by approximately 2050.

Of the vacant land anticipated to be developed, the majority is planned for residential use, with 97 percent planned for single family use and additional areas designated for commercial, city, and irrigated parcels. Planned projects, as depicted in Figure 3-1, would convert approximately 224 acres to residential uses—nearly all single‑family—and up to 44 acres to new commercial development.

Many parcels within the City service area is preserved for natural resources, habitat, waterways, scenic landscapes, and other environmentally sensitive or recreational purposes consistent with State open‑space definitions, or they consist of rights‑of‑way or other classifications that cannot be developed.

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Section 4
System Water Use
This section describes the urban water system demands and the resulting projections for future water demands for the City.

4.1 Water Use by Sector
“Quantify, to the extent records are available, past and current water use, and projected water use (over the same five-year increments described in subdivision (a)), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following uses: (A) Single-family residential; (B) Multifamily; (C) Commercial; (D) Industrial; (E) Institutional and governmental; (F) Landscape; (G) Sales to other agencies; (H) Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof; (I) Agricultural, (J) Distribution system water loss. […] The water use projections shall be in the same five-year increments described in subdivision (a)” (CWC §§ 10631(d)(1)–10631(d)(2)).

The City’s water uses include residential, single-family, and multi-family, as well as non-residential, commercial, industrial, institutional, and dedicated landscape. The City’s “other” use type includes water for construction and for fire response from fire hydrants throughout the City. The City’s 2025 water demand by customer sector use type is shown in Table 4-1. The City meters all water deliveries. The City includes industrial and institutional water use volumes. With the exception of demand from fire hydrants, the City has no agriculture deliveries; deliveries to agricultural users are made by the ECCID. The City does provide non-potable recycled water to customers including one contract to supply recycled water to an olive orchard. Recycled water is discussed further in Section 5.

Table 4-1. Demands for Potable and Non-Potable Water – Actual, Water Code Section 10631(d)(1) (DWR Table 4-1) Use Type
2025 Actual
Additional Description
(as needed) Potable or Non Potable Volume (AF)
Single Family Potable 6,988
Multi-Family Potable 370
Commerciala Includes commercial, institutional, and industrial Potable 696 Landscapeb From potable water supply Potable 1,273
Otherb Construction and fire hydrants Potable 12
Losses Potable 1,385
Potable Subtotal 10,724
Landscapeb Recycled Water Non-Potable 1,445
TOTAL 12,169
a. Institutional and Industrial data included in Commercial totals. b. Landscape and Other use types also use recycled water. The quantity of recycled water within the Other use type cannot be accurately quantified, as such it is assumed that all recycled water was utilized for the Landscape sector.

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Figure 4-1 shows the total potable and raw water demand breakdown by sector. According to the 2025 water delivery data from the City, the single-family residential sector had the highest demand for water at 57 percent. Landscape (recycled) water use had the second highest demand for water at 12 percent. Commercial water and multi-family residential sectors contributed much less demand, with only five and three percent, respectively. Potable and non-potable water deliveries in 2025 totaled 12,169 AF.

Figure 4-1. 2025 City potable and non-potable demand by water use sector

2025 Urban Water Management Plan Section 4: System Water Use 4-3
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4.2 Historical Retail Water Demand
The City’s monthly water demand is displayed in Figure 4-2 below. As seen in the figure, peak water use slightly declined from 2021 to 2023 but saw an increase in 2024, reducing in 2025.

Figure 4-2. Historical water demand

2025 Urban Water Management Plan Section 4: System Water Use 4-4
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4.3 Distribution System Water Loss
“Quantify, to the extent records are available, past and current water use over the same five-year increments described in subdivision (a), and projected water use, identifying the uses among water use sectors, including, but not necessarily limited to, all of the following uses: […] (J) Distribution system water loss.
[…] For the 2015 urban water management plan update, the distribution system water loss shall be quantified for the most recent 12-month period available. For all subsequent updates, the distribution system water loss shall be quantified for each of the five years preceding the plan update.
[…] The distribution system water loss quantification shall be reported in accordance with a worksheet approved or developed by the department through a public process. The water loss quantification worksheet shall be based on the water system balance methodology developed by the American Water Works Association” (CWC §§ 10631 (d)(1) and (2)–10631(d)(3)(A) and (B)).

The difference between water production and billed water use is non-revenue water (NRW). NRW includes the sum of unbilled authorized consumption (water for firefighting, flushing, etc.) plus apparent losses (customer meter inaccuracies, unauthorized consumption and systematic data handling errors) plus physical (real) losses (system leakage and storage tank overflows). NRW, as a part of total system production, and the breakdown of components are summarized in Figure 4-1.

NRW over the last three years averages approximately 12 percent of the total production within the system as shown in Figure 4-4.

System Input
Volume
(Water
Production)
Authorized
Consumption
Billed Metered Revenue Water
Un-Metered
Unbilled Metered
NRW
Un-Metered
Water Losses
Apparent
Unauthorized Consumption
Customer Meter Inaccuracies
and Data Handling Errors
Physical (Real)
Leakage in Transmission and
Distribution Mains
Storage Leaks and Overflows
from Water Storage Tanks
Service Connection Leaks Up to
the Meter
Figure 4-3. Revenue and NRW components
• Revenue water
− Billed Authorized Consumption – Described in Table 4-1 as use type: single-family, multifamily, commercial, and other. • NRW - Described in Table 4-1 as use type: losses.
− Unbilled Authorized Consumption – Operational usage from flow tests and pipeline flushing.

2025 Urban Water Management Plan Section 4: System Water Use 4-5
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. − Water Losses – Sum of the real losses such as from pipe leaks and apparent losses such as from unauthorized consumption, metering inaccuracies, and systematic data handling errors.
• Apparent – Water theft and meter inaccuracies.
• Physical– Water losses from the water distribution system and storage facilities up to the point of delivery to the customer’s system (e.g. up to the residential water meter).

Figure 4-4. Historical water losses

4.3.1 Historical Water Loss
Beginning in 2015, water suppliers were required to quantify their distribution system losses using the American Water Works Association (AWWA) Method water audit software (Title 23 California Code of Regulations Section 638.1 et seq.). The City prepared water audits for 2020 to 2024 on a calendar basis using the AWWA water audit software. The AWWA water audits are provided in Appendix C. The volume of water loss reported in the preceding five years is shown in Table 4-5. The City prepared water audits for 2020 to 2024 on a calendar year basis using the AWWA water audit software. The volume of water loss reported in the preceding five years is shown in Table 4-2. Figure 4-4 illustrates the City’s historical physical and apparent components.

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Table 4-2. Water Loss Audit Reporting, Water Code Section 10631(d)(3)(A) (DWR Table 4-5)
Reporting Period Volume of Water Loss, AFY
2020 1,021
2021 1,542
2022 1,369
2023 1,320
2024 1,362
Volume of water loss from the field “Water Losses” (a combination of apparent losses and real losses) from the AWWA water audit worksheets (Appendix C).

4.3.2 Water Loss Standard
CWC Section 10608.34 required the State Water Resources Control Board (SWRCB) to develop water loss performance standards for urban retail water suppliers. On September 9, 2022, the SWRCB released Individual System Water Loss Standards for the City for physical (real) water loss shown in Table 4-3. Table 4-3 also shows how the City’s existing real water loss compares with the 2028 performance standard. The City is working towards reducing its water loss to meet the water loss standard.

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Table 4-3. Progress Towards 2028 Water Loss Standard, Water Code Section 10631(d)(3)(C) (DWR Table 4-6) Public Water
System ID #
Did the
Water Board
Calculate a
Water Loss
Standard for
this Public
Water
System?
(y/n)
If no,
Supplier will
not complete
this row.

Real Water Loss Apparent Water Loss
State Water Board
Standard
Most Recent AWWA Water Loss
Audit (2024)
Real Water
Loss Per Unit
per Day
State Water Board
Standard
Most Recent AWWA Water Loss Audit
(2024)
Apparent Water
Loss Per Unit per
Day
2028 Real
Water Loss
Standard
per Unit per
day
Units for
Real Water
Loss
Number of Units
(Connections or
Miles
corresponding
with units
selected)
Volume of Total
Real Loss (from
AWWA Water Loss
Audit) (AF)
2028
Apparent
Water
Loss
Standard
per Unit
per Day
Units for
Apparent Water
Loss
Number of
Connections
Volume of Total
Apparent Loss
(from AWWA Water
Loss Audit) (AF)
CA0710004 y 24.3 gpd/connec
tion 21,646 1,115 46 8.5 gpd/connection 21,646 244 10
Source: Individual System water Loss Standards (released January 30, 2026)

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4.4 Estimated Future Water Savings
“Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. […] To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following: (i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections.(ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact” (CWC §§ 10631(d)(4)(A) and (B)).

The City’s projected water demands include projected savings from the active water conservation program as well passive water savings expected to occur from codes, standards, and ordinances.

Projected active conservation program and passive water savings are based on an assumed percent reduction by customer sector applied to the average water usage for indoor or outdoor by customer sector over the past three years (2022-2024). Projected water savings varies from existing customers and future new customers as described in this section.

4.4.1 Active Conservation Program Savings
Active conservation activities are those that are implemented as part of the City’s water conservation program, described in Section 8. Actual demand reductions may vary based on the level of implementation of the City’s active water conservation program. The City’s active conservation efforts are assumed to result in maintaining an annual five percent reduction in water use each year starting in 2030 for each water use sector in addition to savings achieved in previous years.

In 2023, the Governor of California signed into law Assembly Bill (AB) 1572. To address the wasteful use of potable water for irrigating nonfunctional turf, AB 1572 establishes new statewide requirements for prohibiting the irrigation of nonfunctional turf with potable water on commercial, industrial, and institutional (CII) properties including homeowners’ association (HOA) common areas, in stages over the next five years. In compliance with AB 1572 the City is analyzing the water use associated with the nonfunctional turf acreage now that the nonfunctional turf acreage has been made available from the California Water Efficiency Partnership (CalWEP) as part of the CII-LAMLUCD data through their customers development tool, the Cal WEP LAM Explorer. No additional water savings as a result of AB 1572 is included in this UWMP.

4.4.2 Passive Water Savings
Demand reductions estimated to occur as a result of passive and water savings are incorporated in the future demands. Water savings assumed from codes, standards, ordinances, or transportation and land use plans are referred to as passive savings. Below is a summary of the applicable state codes and ordinances that are assumed to reduce the City’s water demand in the future. • Model Water Efficient Landscape Ordinance (MWELO) – Effective on December 1, 2015, this ordinance reduces the typical residential outdoor landscape demands for new construction by up to 20 percent from the estimated demand using the prior ordinance provisions. Commercial landscape for new construction may reduce outdoor water demand by up to 35 percent over the prior ordinance. These new construction residential and commercial savings are included in this analysis.
• California Energy Commission Title 20 appliance standards for toilets, urinals, faucets, and showerheads – This standard impacts both new construction and replacement fixtures in

2025 Urban Water Management Plan Section 4: System Water Use 4-9
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. existing homes. This is included in the CALGreen assumption for new construction described below. Indoor water use in existing homes is reduced by five percent in this analysis. • CALGreen Building Code – Requires residential and non-residential water efficiency and conservation measures for new buildings and structures. A reduction of residential and nonresidential indoor water use on new construction by up to 20 percent is included in this analysis.

Table 4-4 provides the estimated passive water savings as a result of the codes and ordinances described above.

Table 4-4. Passive Water Savings Projections, AF, Water Code Section 10631(d)(4)(A) (DWR Table 4-4) Description (Codes, Standards, Ordinances, or Plans) 2030 2035 2040 2045 2050 Model Water Efficient Landscape Ordinance (MWELO) 75 153 210 333 356 California Energy Commission Title 20 appliance standards for toilets, urinals, faucets, and showerheads a 207 207 207 207 207
CALGreen Building Code 60 124 173 281 306
Total 341 484 590 822 868
a. California Energy Commission Title 20 appliance standards for toilets, urinals, faucets, and showerheads savings is assumed to be completely realized by 2030 for existing customers. These savings are for existing customers and are not applied to future customers and thus are not projected to increase into the future.

4.5 Projected Water Demand
Table 4-2 presents the projected water use by water use sector in five-year increments through 2050 based on the following components:
• Water demand for planned future developments shown in Figure 3-1 are incorporated into the forecasts. The water demand included in this analysis for planned future development in included in Appendix M.
• The City’s future water losses are assumed to reduce to 6.3 percent of the total production for physical (real) water loss plus maintaining 2.4 percent of total production for apparent water loss to result in 8.7 percent of total production by 2028 as the City meets its water use performance standard.
• A 5 percent increase in water demand through the planning horizon is applied to outdoor water usage to account for water demand increases due to climate change as discussed in Section 3.

To address this projected increase in water demand due to future climate change the City will be complying with state requirements to reduce outdoor water usage in the future, such as reduced water usage for nonfunctional turf. For this UWMP analysis these future reductions in outdoor water usage is not reduced beyond the savings assumed in Section 4.4 at this time.

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Table 4-5. Retail: Demands for Potable– Projected, Water Code Section 10631(d)(1) (DWR Table 4-2) Use Type Additional Description
(as needed)
Projected Water Use
Report to the extent that records are available
2030 2035 2040 2045 2050
Single Family 6,969 7,683 8,023 8,363 8,394
Multi-Family 511 706 830 955 1,063
Commerciala Includes commercial, institutional, and
industrial 695 767 816 864 865
Landscape From potable water supply 1,344 1,557 1,622 1,687 1,708 Other Construction and fire hydrants 11 11 11 11 11
Losses 1,143 1,022 1,077 1,132 1,147
Potable Subtotal 10,673 11,158 11,760 12,362 12,529
Landscape Recycled Water 1,612 1,780 1,869 1,959 1,988
TOTAL 12,286 12,938 13,630 14,321 14,517
Units: AF
a. Institutional and Industrial data included in Commercial totals.

4.5.1 Per Capita Water Demand
With the onset of the 2013 - 2015 drought and the proactive measures taken by the City to curtail water use, the City’s per capita demand decreased substantially. The reduced demand during the 2013 - 2015 drought resulted in a significant decline in per capita water use. Per capita water use has not returned to pre-drought levels since the end of the drought. Consumption stabilized between 2017 and 2019 at around 145 gallons per capita per day (GPCD) but saw a notable increase in 2020 with the onset of the COVID-19 pandemic. The GPCD has decreased from 2020 to 2025.

The future per capita demand is projected to be less than the 2020 value and less than the City’s SBx7-7 2020 target (described in Section 4.6 of this UWMP). With increased water conservation and water loss control efforts to meet the anticipated State standards (discussed in Section 44), per capita demand is expected to decrease to approximately 131 GPCD by 2050. Figure 4-5 illustrates the historical, projected, SBx7-7 2020 per capita target, and baseline GPCDs for The City. As shown in Figure 4-5, the City met its SBx7-7 2020 per capita demand target.

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Figure 4-5. City per capita water demand

4.6 Per Capita Water Demand Target Compliance
This section describes the City’s SBX7-7 GPCD baseline and targets as updated from the analysis conducted as part of the 2010 and 2015 UWMP. The City met their 2020 GPD target as documented in the 2020 UWMP and as presented in Table 4-6.

Table 4-6. SB x7-7 2020 Target Progress, Water Code Section 10608.40 – North Davis Meadows (DWR Table 5-1) Check the box if the Supplier was not an Urban Water Supplier during or before the 2020 UWMP reporting cycle. Proceed to the next table.

Was Supplier
part of a
merger or
consolidation
since 2020?
Regional
Alliance
Target or
Individual
Target?
2020
Target
Actual
2020
GPCD
Did Supplier Achieve Targeted
Reduction for 2020?
Y/N
Only for suppliers that did not meet
the Target in 2020
Actual 2025 GPCD
(From SB X7-7
Compliance Form)
Did Supplier
meet the
2020 Target in
2025?
Yes Individual 193 168 Y N/A N/A
N/A = not available

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4.7 Water Use for Lower Income Households
“The water use projections required by Section 10631 shall include projected water use for singlefamily and multifamily residential housing needed for lower income households, as defined in Section 50079.5 of the Health and Safety Code, as identified in the housing element of any city, county, or city and county in the service area of the supplier” (CWC §§ 10631.1(a)).

Lower income residential demands are included in the City’s demand projections. To estimate water demands from lower income households, the percent of the population that is low income is estimated from City household income data. In State housing law, extremely low (0 to 50 percent of the area median income), low (51 to 80 percent of the area median income), moderate (81 to 120 percent of the area median income), and above moderate (more than 120 percent of the area median income) incomes are based on the county’s median income. Moderate income means average income for the county and low income is simply below average income (City of Brentwood, 2015). Since Contra Costa County has a relatively high median household income ($125,727 as of 2023), a family of four with a household income of less than $100,582 is considered to be “low income” in Contra Costa County (Census Bureau, 2019). Based on State housing law and the aforementioned low income threshold for Contra Costa County, City data suggests that approximately

32.7 percent of households in the City are considered “low income” (City of Brentwood, 2025a). This was approximately 3,500 AF of potable water use in 2025.

Low-income water demands are included in the demand projections presented in Tables 4-5.

Verification that the demands by lower income households are included in the water use projections in this UWMP are shown in Table 4-7.

Table 4-7. Inclusion in Water Use Projections, Water Code Section 10631(a), 10631(d)(4)(A), and 10631(d)(4)(B) (DWR Table 4-3)
Future Water Savings Included in Projections (Y/N) Yes
If "Yes" to above, state the section or page number where citations of the codes, ordinances, etc. utilized in demand projections are found.

Location in UWMP:

Section 4.4
Are lower Income Residential Demands Included in Projections? Yes

5-1
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Section 5
Water Supplies
This section describes the sources of water available to the City for distribution and services. It includes a description of each water source, source limitations, water quality, and other water opportunities, including recycled water. The City’s current supply consists of both surface water from the Delta and groundwater from existing wells located in the San Joaquin Groundwater Basin.

5.1 Surface Water
In 1999, the City entered into an agreement with ECCID that provides the City with a permanent entitlement of 14,800 AFY of surplus irrigation water from the Delta. ECCID has pre-1914 water rights. To date, this water supply has been reliable and has not been subject to delivery reductions during water shortages, including regulatory restricted and drought years. The ECCID permanent entitlement may only be used by the City and its retail customers within the City limits or within the ECCID service area (CCLAFCO, 2007). Surface water supplies for the City originate from Rock Slough.

The supply is transported through the Contra Costa Canal for treatment at CCWD’s Randall Bold Water Treatment Plant (RBWTP) and at the City of Brentwood Water Treatment Plant (COBWTP).

Supplies are summarized as follows:
• ECCID Surface Water treated at RBWTP
• ECCID Surface Water treated at COBWTP

5.1.1 ECCID Surface Water Treated at RBWTP
Up to 1,902 AFY of the ECCID surface water supply is treated through the RBWTP facility. The RBWTP has a design capacity to treat up to 50 million gallons per day (MGD) and is jointly owned by Diablo Water District and CCWD. The City has purchased a permanent capacity share of 6 MGD at the RBWTP and may use additional capacity on an as‐need basis (CCWD, 2020).

5.1.2 ECCID Surface Water Treated at COBWTP
The portion of the ECCID surface water supply not treated at the RBWTP is treated at the COBWTP.

Raw water is pumped to the COBWTP from the Rock Slough intake via the Contra Costa Canal. The COBWTP was built in 2008 to serve the City. The completed first phase of the COBWTP, which has been constructed and is in operation, can treat up to 16.5 mgd. However, the COBWTP is designed so that it can be expanded to an ultimate capacity of 33 mgd.

5.1.3 Surface Water Quality
The water quality of the Delta is generally evaluated using its chloride concentration. Historically, chloride concentration at the Delta water intakes have fluctuated but generally remain below the secondary MCL of chloride in drinking water of 250 mg/L. The raw water from the Delta is generally characterized by low to moderate levels of turbidity, minerals, and natural organic matter.

Additionally, due to weather variations, storm events, and diurnal patterns, water quality for each of the three sources of surface water (Old River, Middle River, and Rock Slough) in the Contra Costa Canal can fluctuate from year to year, seasonally, daily, and even hourly. Pathogenic organisms are anticipated to be present in low concentrations as well based on issues with taste and odor in the

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Contra Costa Canal; certain types of algae and bacteria are responsible for producing geosmin and methylisoborneol (MIB). (City of Brentwood, 2025).

However, both the COBWTP and RBWTP are designed for fluctuations in raw water quality and consistently produce a high quality treated water year round, in normal through dry year as evidenced by the successful performance of these water treatment plants (WTP) over the last 25 years.

During periods of low salinity in the Delta, raw water is pumped by CCWD from intakes located on the old and middle river into the Los Vaqueros Reservoir and stored for future use. This stored water is released into the Contra Costa Canal and blended with raw water from other diversions as needed.

In the event that CCWD is unable to convey ECCID water supply due to operational constraints, regulatory requirements, emergency conditions, or court order to curtail some or all of CCWD’s diversions of the City’s ECCID surface water, CCWD is to furnish other water (non-ECCID) equivalent to 0.67 AFY per purchased equivalent connection per the City’s agreement with CCWD and ECCID in Appendix D.

5.2 Purchased or Imported Water
The City does not purchase or import water supply. The City’s surface water supplies are described in Section 5.1.

5.3 Groundwater
“(If) groundwater […] identified as an existing or planed source of water available to the supplier” (CWC §§ 10631(4)(A)–10631(4)(D)).

This section provides a description of the groundwater basin, water quality, and the groundwater management framework.

5.3.1 Basin Description
“(Provide) a description of any groundwater basin or basins from which the urban water supplier pumps groundwater.” For a basin that has not been adjudicated, information as to whether the department has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to coordinate with groundwater sustainability agencies or groundwater management agencies listed in subdivision (c) of Section 10723 to maintain or achieve sustainable groundwater conditions in accordance with a groundwater sustainability plan or alternative adopted pursuant to Part 2.74. (CWC §§ 10631(4)(B)).

The City’s groundwater wells are located within the northwest part of the ECC Subbasin (ECC Subbasin) within the larger San Joaquin Valley Groundwater Basin. The ECC Subbasin, also referred to as the San Joaquin Valley-East Contra Costa (5-22.19), is a medium priority groundwater basin based on the Groundwater Basin Prioritization by DWR as of January 2022 (ECCGSA, 2021).

The ECC Subbasin covers the eastern portion of Contra Costa County and is primarily defined by jurisdictional and surface water boundaries. Figure 5-1 delineates the ECC Subbasin boundary, Groundwater Sustainability Agencies (GSAs) in the ECC Subbasin, and adjacent subbasins. The ECC Subbasin is bounded on the north, east, and south by the Contra Costa County line, which is contiguous with the San Joaquin River (north) and Old River (east). The western boundary (from south to north) follows the Diablo Range north up to the section of the San Joaquin River near the City of Antioch. The ECC Subbasin has a total surface area of approximately 168 square miles

2025 Urban Water Management Plan Section 5: Water Supplies 5-3
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. (ECCGSA, 2021). The ECC Subbasin is comprised of continental deposits of Late Tertiary to Quaternary age. Deposits include the Tulare Formation, Older Alluvium, Flood Basin Deposits, and Younger Alluvium (DWR, 2006). The cumulative thickness of these deposits increases from a few hundred feet near the Coast Range foothills on the west to about 3,000 feet along the eastern margin of the basin (City of Brentwood, 2013a).

The geological setting of Contra Costa County is composed of surficial (quaternary) deposits that overlie fault-bounded bedrock assemblages. ECC County has four groundwater regions. The City occupies the largest region, an area where groundwater occurs in material that was deposited by streams that originate in the coast ranges to the west. Aquifer materials capable of yielding quantities of water suitable for municipal and / or agricultural purposes extend to depths of 600 feet below the ground surface.

The City’s groundwater wells range in depth from 200 to 660 feet, and draw from the Tulare Formation. The Tulare is exposed in the Coast Range foothills along the western margin of the basin and dips east beneath the San Joaquin Valley with increasing depths (ECCGSA, 2021). It consists of semi-consolidated, poorly sorted, discontinuous deposits of clay, silt, and gravel. The older alluvium deposit consists of loosely to moderately compacted sand, silt, and gravel deposited in alluvial fans during the Pliocene and Pleistocene. The older alluvium is widely exposed between the Coast Range foothills and the Delta. The alluvium thickens eastward to over 300 feet beneath the City and about 400 feet below Old River (ECCGSA, 2021). It is moderately to locally highly permeable (DWR, 2006).

Flood basin deposits occur in the Delta portion of the ECC subbasin. They are the distal equivalents of the Tulare Formation and older and younger alluvial units and consist primarily of silts and clays.

Occasional inter-beds of gravel occur along the present waterways. Due to their fine-grained nature, the flood basin deposits have low permeability and generally yield low quantities of water to wells.

Occasional zones of fresh water are found in the basin deposits, but they generally contain poor quality groundwater. The younger alluvium deposits include those deposits that are accumulating or would be accumulating under natural conditions. It includes sediments deposited in the channels of active streams as well as overbank deposits and terraces of those streams.

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Figure 5-1. ECC county subbasin, GSAs and adjacent subbasins Source: ECCGSA, 2022

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5.3.2 Groundwater Quality
Groundwater serves a variety of domestic and agricultural uses throughout the ECC Subbasin with limited restrictions due to natural (salinity and boron) and anthropogenic (nitrate) causes. The ECC Subbasin’s groundwater quality is generally stable. Groundwater pumped from the ECC Subbasin generally exceeds or is near the recommended secondary maximum contaminant levels (MCL) for total dissolved solids (TDS) (500 milligrams per liter mg/L) and chloride (250 mg/L). The observed concentrations may reflect a naturally higher baseline for these constituents (ECCGSA, 2021).

Nitrate concentrations in the ECC Subbasin tend to generally exceed the MCL (10 mg/L) as well, particularly for wells pumping from the shallow zone. Nitrate concentrations for the City wells, however, tend to be below the MCL levels. This may be due to past agricultural influences in the area. Arsenic concentrations are generally less than the MCL (10 ug/L) basin wide. Although Boron concentrations are high in most wells and are attributed to a naturally elevated baseline, boron is an unregulated substance under the secondary drinking water standards and is not considered a health hazard.

5.3.3 Groundwater Management
“(Provide) the current version of any groundwater sustainability plan.” (CWC §§ 10631(4)(A)).

The groundwater in the City’s portion of the ECC Subbasin is managed by the City GSA. The City currently draws its authority from a 2022 second amended and restated memorandum of understanding (MOU) agreement between the City and other ECC Subbasin participating agencies (City of Antioch, Byron-Bethany Irrigation District, CCWD, Contra Costa County, Diablo Water District, ECC Irrigation District, and Town of Discovery Bay). The first MOU was signed by the City in 2016 and amended in 2020 (2020, ECCID). This second amended and restated MOU was signed on May 2022. This section describes the City’s groundwater management plan and activities pertaining to the California Statewide Groundwater Elevation Monitoring (CASGEM) and the SGMA.

5.3.3.1 Groundwater Management Plan
As part of the first amended and restated MOU, the eight local agencies which overlay the ECC Subbasin (Figure 5-1) collaborated and developed a single GSP for the ECC Subbasin (ECCGSA, 2017). The most recent groundwater management plan is in the form of the 2022 GSP, located at California Department of Water Resources SGMA Portal
https://sgma.water.ca.gov/portal/gsp/preview/120.

5.3.3.2 Sustainable Groundwater Management Act
“For a basin that has not been adjudicated, (provide information as to whether the department has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to coordinate with groundwater sustainability agencies or groundwater management agencies listed in subdivision (c) of Section 10723 to maintain or achieve sustainable groundwater conditions in accordance with a groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720). (CWC §§ 10631(4)(B)).

SGMA was enacted by the legislature in 2014, with subsequent amendments in 2015. SGMA requires groundwater management in priority groundwater basins, which includes the formation of GSAs and the development of GSPs for groundwater basins or subbasins that are designated by DWR as medium or high priority.

The designation of the priority of groundwater basins was conducted as part of the CASGEM Program. CASGEM was developed in response to legislation enacted in California's 2009

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Comprehensive Water package. The CASGEM Groundwater Basin Prioritization is a statewide ranking of groundwater basin importance that incorporates groundwater reliance and focuses on basins producing greater than 90 percent of California's annual groundwater. The CASGEM Program has ranked the ECC Subbasin (5-22.19) as medium priority (ECCGSA, 2021).

SGMA directs DWR to identify groundwater basins and subbasins in conditions of critical overdraft.

The DWR identified such basins in Bulletin-118, 1980 and Bulletin 118, Update 2003. An interim update was published in 2016 that included critically overdrafted basin designations and basin boundary revisions, and information important to implementing the SGMA. The ECC Subbasin is not on that list (DWR, 2016a).

The ECC Subbasin GSP’s planning area is shown in Figure 6-1. With the exception of CCWD, each member agency of the ECC Subbasin became a GSA to be the local agency to manage the ECC Subbasin within their respective service area. Work products related to the ECC Subbasin GSP can be found in the ECC County Integrated Regional Water Management website: https://www.ecccirwm.org/sgma

5.3.4 Historical Groundwater Pumping
“(Provide) a detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.” (CWC §§ 10631(4)(C)).

Hydrographs for the ECC Subbasin indicate that the majority of the water levels in wells have remained relatively stable dating back to 1993 (ECCGSA, 2021). Seasonal variation resulting from recharge and pumping was evident, but levels were stable overall. In general, historical conditions as reflected in the hydrographs and contour maps indicate that the groundwater system has no apparent overdraft, suggesting that historical extraction patterns have not exceeded the safe yield of the basin. The sustainable yield for the ECC Subbasin is estimated at approximately 72,000 AFY, which was derived using 55 percent greater pumping than the historical average.

Table 5-1 presents the amount of groundwater pumping by the City that has occurred over the last five years. While the City’s groundwater design pumping capacity is able to pump over 5,800 AFY, the reasonably available groundwater able to be used is only approximately 2,200 AFY due to water quality constraints for chloride in the wastewater treated effluent discharge. However, the wells can produce more water as needed if treated, rehabilitated, or replaced as there are no current basin limitations. Note that groundwater usage was lower in 2025 due to the increased usage of surface water in 2025.

Table 5-1. Retail: Groundwater Volume Pumped, Water Code Section 10631(4) and 10631(4)(c) (DWR Table 6-1) Groundwater Type Location or Basin Name 2021 2022 2023 2024 2025 Alluvial basin San Joaquin Valley Basin
(ECC Subbasin) 1,924 1,780 1,771 1,722 1,284
Units: AFY

5.4 Stormwater
The City neither captures nor reuses stormwater now and has no plans to capture and reuse stormwater.

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5.5 Wastewater and Recycled Water
“The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of this plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area” (CWC §§ 10633).

Municipal recycled water is municipal wastewater that has been treated to a specified quantity to enable it to be used again for a beneficial purposes. For the purpose of this UWMP, recycled water means only municipal recycled water, that is, water that has been treated and discharged from a municipal wastewater facility. The purpose of this section is to provide information on recycled water and its potential as a resource for the City. The elements of this section include: (1) the quantity of wastewater generated in the service area, (2) description of the collection, treatment, and disposal/reuse of that wastewater, (3) current water recycling systems, and (4) the potential for water recycling in the service area.

5.5.1 Recycled Water Coordination
The City’s WWTP receives, treats, and discharges municipal wastewater that is generated, collected, and treated within the City’s service area. The WWTP produces tertiary filtered and disinfected water suitable for non-potable reuse.

5.5.2 Wastewater Collection, Treatment, and Disposal
[Describe] the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. (CWC §§ 10633(a)–10633(b)).

This section describes how wastewater in the City’s water service area is collected, treated, and discharged.

5.5.2.1 Wastewater Collected within Service Area
Wastewater is collected by gravity in a series of mains, trunks, and interceptors that transport wastewater from its source to the WWTP. Table 5-2 summarizes key information about wastewater generated in the City sewer service area.

Table 5-2. Wastewater Collected Within Service Area in 2025, Water Code Section 10633(a) (DWR Table 6-2) 100% Percentage of 2025 service area covered by wastewater collection system (optional) 100% Percentage of 2025 service area population covered by wastewater collection system (optional) Wastewater collection Recipient of collected wastewater Name of Wastewater
Collection Agency
Wastewater
Volume
Metered or
estimated?
Volume of
Wastewater
Collected from
UWMP Service
Area 2025
Name of Wastewater
Treatment Plant
(WWTP) and Place ID
Number
Is WWTP Located
within UWMP
area?
Is WWTP Operation
Contracted to a
Third Party?
(optional)
City of Brentwood Metered 4,674 Brentwood WWTP, Place
ID 210322 Yes No
Total Wastewater Collected from Service Area in
2025 (AFY): 4,674

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5.5.2.2 Wastewater Treatment and Discharge within Service Area The City’s WWTP is a tertiary treatment plant that provides recycled water for primarily landscape irrigation and one concrete batch plant. The WWTP has an average dry weather flow treatment capacity of 5 mgd and is currently being expanded to accommodate an average dry weather flow capacity of 6.4 mgd. The WWTP expansion is expected to be completed within the NPDES permit term, by 2028. The treatment system consists of a headworks (screening and grit removal), oxidation ditches and denitrification basins providing biological treatment, secondary clarification, tertiary filtration, chlorine disinfection, dechlorination, a cascade aeration system, and belt filter press.

Wastewater from the City that is not reused is treated and discharged to Marsh Creek, which drains to Big Break in the Delta. Table 5-3 presents the City’s WWTP wastewater treated volumes and the amount of water recycled for non-potable reuse.

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Table 5-3. Retail: Wastewater Treatment and Discharge within Service Area in 2025, Water Code Section 10633(a) (DWR Table 6-3) Wastewater
Treatment
Plant Name
and Place ID
Number
Discharge
Location
Name or
Identifier
Discharge
Location
Description
Wastewater
Discharge ID
Number
(optional)
Method of
Disposal
Does this Plant
Treat
Wastewater
Generated
Outside the
Service Area?
Treatment
Level
2025 volumes
Wastewater
Treated
Discharged
Treated
Wastewater
Recycled
within Service
Area
Instream Flow
Permit
Requirement
Brentwood
WWTP, Place ID
210322
Marsh Creek
Creek, within
the Sacramento
San Joaquin
Delta
Order R5-2019-
0029
River or creek
outfall No Tertiary 4,674 3,045 1,445 0
Total 4,674 3,045 1,445 0
Units: AFY

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5.5.3 Recycled Water System
“[Describe] the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use” (CWC §§ 10633 (c)).

Recycled water is an important part of the City’s water resources. Recycled water allows the City to conserve potable water for a reliable water supply for current and future demand. Figure 5-2 presents the City’s recycled water distribution system.

The City’s WWTP’s tertiary treatment and disinfection provides recycled water for landscaping as well as processes at the Antioch Building Materials concrete batch plant. The City is a producer and distributer of Title 22 tertiary recycled water for unrestricted reuse (i.e., unrestricted non-potable reuse) during the seasonally dry summer months. The City’s recycled water is distributed through its non-potable water supply system. The system delivers water for irrigation and includes a network of transmission and distribution pipelines and pump stations. The production and distribution of recycled water is covered under the SWRCB Order WQ 2016-0068-DDW. Per City staff, the City’s WWTP supplied 1,445 AF of recycled water for landscape irrigation in 2025.

5.5.4 Recycled Water Beneficial Uses
“[…] [Describe and quantify] the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse (IPR), and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. […] [Describe] the projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years” (CWC §§ 10633 (c) and (d)).

This section presents the projected potential use and planned versus actual use of recycled water in 2025.

5.5.4.1 Projected Future Use of Recycled Water
The City plans to use recycled wastewater for the irrigation of existing and future parks and landscape amenities. The City has already constructed a portion of the planned recycled water distribution system and will continue to expand the system as the City grows. The City has identified several parks that have the potential to be served with recycled water. The 2050 buildout recycled water demands are estimated to be 1,988 AF.

Table 5-4 provides a summary of current and projected recycled water use within the service area.

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Table 5-4. Recycled Water Direct Beneficial uses within Service Area, Water Code Section 10633 (c)(e) (DWR Table 6-4) N/A Recycled water is not used and is not planned for use within the service area of the supplier.

The supplier will not complete the table below.

Name of supplier producing (treating) the recycled water: City of Brentwood Name of supplier operating the recycled water distribution system: City of Brentwood Supplemental water added in 2020 (volume) include units N/A Source of 2020 supplemental water N/A
Beneficial Use Type General Description of 2020 Uses
Level of Treatment
Drop Down List 2025 2030 2035 2040 2045 2050
Agricultural irrigation -- -- -- -- -- --
Landscape irrigation (excludes golf
courses)
Currently being used, has the potential
for increased use Tertiary 1,445 1,612 1,780 1,869 1,959 1,988 Golf course irrigation -- -- -- -- -- --
Commercial use -- -- -- -- -- --
Industrial use -- -- -- -- -- --
Geothermal and other energy production -- -- -- -- -- -- Seawater intrusion barrier -- -- -- -- -- --
Recreational impoundment -- -- -- -- -- --
Wetlands or wildlife habitat -- -- -- -- -- --
Groundwater recharge (IPR) -- -- -- -- -- --
Surface water augmentation (IPR) -- -- -- -- -- --
Direct potable reuse -- -- -- -- -- --
Other -- -- -- -- -- --
TOTAL (within the service area) 1,445 1,612 1,780 1,869 1,959 1,988 IPR – Indirect Potable Reuse
Units: AFY

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5.5.4.2 Planned Versus Actual Use of Recycled Water
“[…] [Provide] a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision” (CWC §§ 10633 (e)).

Table 5-5 provides a comparison of the recycled water use projected to occur in 2025 in the 2020 UWMP with the actual 2025 recycled water use. Actual recycled water use in 2025 was higher than what was projected in the 2020 UWMP.

Table 5-5. 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual, Water Code Section 10633 (e) (DWR Table 6-5)
Use Type 2020 Projection for 2025 2025 Actual Use
Agricultural irrigation -- --
Landscape irrigation (excludes golf courses) 1,117 1,445 Golf course irrigation -- --
Commercial use -- --
Industrial use -- --
Geothermal and other energy production -- --
Seawater intrusion barrier -- --
Recreational impoundment -- --
Wetlands or wildlife habitat -- --
Groundwater recharge (IPR) -- --
Direct potable reuse -- --
Other -- --
Total 1,117 1,445
Units: AFY

5.5.5 Actions to Encourage and Optimize Future Recycled Water Use “[Describe the] actions, including financial incentives, which may be taken to encourage the use of recycled water, and the projected results of these actions in terms of acre-feet of recycled water use per year.
[…] [Provide a] plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use” (CWC §§ 10633 (f) and (g)).

The City encourages recycled water use by providing financial incentives. This recycled water rate which is $1.23 per 1,000 gallons (effective July 1, 2025) per the Water and Wastewater Rate Study (City of Brentwood, 2023), is almost one third that of potable water in Tier 1 and one tenth of the cost of potable water in Tier 4. The City plans on maintaining recycled water cost proportionally lower than of potable water in the future.

The City completed the planned Non-Potable Water Distribution System project during fiscal year 2021/2022. The City expanded the recycled (non-potable) water distribution system throughout the City and installed new mains, pipelines, converting landscape irrigation meters from potable to nonPage 1049 of 1460 2025 Urban Water Management Plan Section 5: Water Supplies 5-13
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The City hopes to increase recycled use among the number of large‐volume customers in the future as these large-volume customers realize that operating costs can be reduced from the use of recycled water. Potential customers include roadway irrigation and parks.

The City currently has two projects to increase the use of recycled water.

1. Automated Recycled Water Fill Station the City opened at the WWTP in 2015 and is still ongoing.

City customers may bring containers (up to 300 gallons) to fill with recycled water and take for appropriate use. The recycled water is free of charge but customers must complete a training program prior to gaining access to the resource.

2. Expand the use of recycled water during construction by encouraging local contractors to use recycled water for dust control and earth compaction when available.

Table 5-6 provides a summary of the City’s ongoing actions to encourage and optimize future recycled water use.

Table 5-6. Methods to Expand Future Recycled Water Use, Water Code Section 10633 (f) (DWR Table 6-6) Name of Action Description Planned Implementation
Year
Expected Increase in
Recycled Water Use
Financial incentives Recycled water at a decreased rate reduces potable and raw water use. ongoing N/A
Recycled water fill station
The City has opened a recycled water
fill station at the WWTP for customers
in the City.The recycled water fill
station has been automated to allow
24hr self-serve access.
ongoing N/A
Increased recycled water access
opportunities
Expansion of the non-potable water
distribution system. ongoing N/A
Regulatory incentives
City to encourage recycled water use
for dust control and earth compaction
for construction projects.
ongoing N/A

5.6 Desalinated Water Opportunities
“Describe the opportunities for development of desalinated water, including, but not limited to, ocean water, brackish water, and groundwater, as a long-term supply” (CWC §§ 10631(g)).

The City has no sources of ocean water, brackish water, or groundwater that provide viable opportunities for development of desalinated water as a direct long-term supply.

5.7 Exchanges or Transfers
“Describe the opportunities for exchanges or transfers of water on a short-term or long term basis” (CWC §§ 10631(c)).

The City does not currently participate in any transfer or exchange programs.

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5.8 Future Water Supply Projects
“[…] The urban water supplier shall include a detailed description of expected future projects and programs […] that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in average, single-dry, and multiple-dry water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program” (CWC §§ 10631(f)).

The City’s primary future water supply projects are described in the City’s 2025/26–2029/30 Capital Improvement Program (City of Brentwood, 2025b). Table 5-7 summarizes the City’s existing projects that will improve existing and future water supplies for the City. Potential water supply benefits during various water supply year types have not been estimated.

Table 5-7. Expected Future Water Supply Projects or Programs, Water Code Section 10631 (f) (DWR Table 6-7) Name of Future
Projects or Programs
Joint Project with
Other Agencies?
Description
(If Needed)
Planned
Implementation
Year
Planned For
Use
in Year Type
Expected
Increase In
Water Supply
to Agency
Recycled Water Pump
Station Flow and
Capacity (RWPS)
Upgrade
No
In FY 21/22, the City installed recycled
(non-potable) water distribution system
throughout the City to provide recycled
water for irrigation of parks, parkways,
medians, and other applicable uses.

To meet growing demands for recycled
water, this project will upgrade the
RWPS.
2026 All Year Types N/Aa
a. The City is working with a consultant to study current operations, collect additional data, and provide a report with any further recommendations. Potential water supply benefits during various water supply year types have not been estimated.

5.9 Summary of Existing and Planned Sources of Water
“Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision 10631(b). […] [Provide a] detailed description and analysis of the amount and location of groundwater that is projected to be pumped by the urban water supplier. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records” (CWC §§ 10631(b) and (b)(4)).

Table 5-8 provides a summary of actual supply sources and quantities in 2025. Table 5-9 presents the water supplies projected from 2030 through 2050.

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Table 5-8. Water Supplies – Actual, Water Code Section 10631 (b) (DWR Table 6-8) Water Supply Additional Detail on
Water Supply
2025
Actual Volume Water Quality Total Entitlement or
Safe Yield
Surface Water
ECCID (treated at RBWTP) 2,773 Drinking Water
14,800a
ECCID (treated at COBWTP) 6,666 Drinking Water
Groundwater ECC Subbasin 5-22.19 1,284 Drinking Water 2,200b Recycled Water City WWTP Supply 1,445 Recycled Water 2,802c Total 12,169 23,403
Units: AFY
a. The total ECCID purchase entitlement is 14,800 AFY. A portion of this water is treated at RBWTP (6 mgd, 1,902 AFY) and the rest of the total was split between potable and non-potable supplies as needed. b. The firm design capacity of the City’s wells is 5.18 mgd. While the City’s groundwater pumping capacity is able to pump over 5,800 AFY, the reasonably available groundwater able to be used is only approximately 2,200 AFY due to water quality constraints for chloride in the wastewater treated effluent discharge.
c. It is assumed that up to 50% of the WWTP capacity is available for future recycled water use.

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Table 5-9. Water Supplies – Projected, Water Code Section 10631 (b) (DWR Table 6-9) Water Supply Additional Detail on Water Supply
2030 2035 2040 2045 2050
Reasonably Available
Volume
Total Right or Safe Yield
Reasonably Available
Volume
Total Right or Safe Yield
Reasonably Available
Volume
Total Right or Safe Yield
Reasonably Available
Volume
Total Right or Safe Yield
Reasonably Available
Volume
Total Right or Safe Yield
Groundwater a ECC Subbasin 5-22.15 2,200 5,801 2,200 5,801 2,200 5,801 2,200 5,801 2,200 5,801 Surface water b
ECCID (treated at RBWTP)
14,800 14,800 14,800 14,800 14,800 14,800 14,800 14,800 14,800 14,800 ECCID (treated at COBWTP)
Recycled water c City WWTP supply 1,612 3,580 1,780 3,580 1,869 3,580 1,959 3,580 1,988 3,580 Total 18,612 24,181 18,780 24,181 18,869 24,181 18,959 24,181 18,988 24,181 Units: AFY
a. The firm design capacity of the City’s wells is 5.18 mgd. While the City’s groundwater pumping capacity is able to pump over 5,800 AFY, the reasonably available groundwater able to be used is only approximately 2,200 AFY due to water quality constraints for chloride in the wastewater treated effluent discharge. However, the wells can produce more water as needed if treated, rehabilitated, or replaced as there are no current basin limitations. b. The total ECCID purchase entitlement is that of 4,823 million gallons per year (MGY) (14,800 AFY). A portion of this water is treated at RBWTP (6mgd, 1,902 AFY). c. It is assumed that 50% of the WWTP capacity is available for future recycled water use. It is assumed the City will expand the WWTP capacity from 5 mgd to 6.4 mgd by 2028. The reasonably available volume of recycled water is based on the projected recycled water demand.

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5.10 Energy Intensity
“In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain: […] (7) Any other energy-related information the urban water supplier deems appropriate.” (CWC §§ 10631.2(a)(1)– 10631.2(a)(7)).

Water energy intensity is the total amount of energy per acre foot associated with water management processes occurring within the City’s operational control. Because the City delivers potable, non-potable, and recycled water supplies to its customers, the “Multiple Water Delivery Products” approach is being used for this analysis. Tables 5-10, 5-11, and 5-12 present the energy intensity of the City’s water supplies for a twelve month period. Energy is used to treat raw water at the COBWTP, for well production and pumping, pumping of non-potable water supply, and to produce recycled water at the WWTP.

Table 5-10. Energy Intensity – Multiple Water Delivery Products (DWR Table O-1C) Urban Water Supplier: City of Brentwood
Start Date for Reporting
Period: 08/10/2024 Urban Water Supplier Operational Control End Date: 09/04/2025 Water Management Process
Non-Consequential
Hydropower
(if applicable)
Extract
and Divert
Place into
Storage Conveyance Treatment Distribution Total Utility Hydropower Net Utility Volume of Water Entering
Process (AF) 2,806 0 0 6,266 0 -- 0 --
Retail Potable Deliveries (%) 80% 0% 0% 100% 0% 0%
Retail Non-Potable Deliveries (%) 20% 0% 0% 0% 0% 0%
Wholesale Potable Deliveries(%) 0% 0% 0% 0% 0% 0%
Wholesale Non-Potable
Deliveries (%) 0% 0% 0% 0% 0% 0%
Agricultural Deliveries (%) 0% 0% 0% 0% 0% 0%
Environmental Deliveries (%) 0% 0% 0% 0% 0% 0%
Other (%) 0% 0% 0% 0% 0% 0%
Total Percentage
[must equal 100%] 100% 0% 0% 100% 0% 0%
Energy Consumed (kWh) 1,745,005 0 0 2,766,076 0 4,511,081 0 4,511,081 Energy Intensity (kWh/AF) 621 0 0 441 0 -- 0 --
Energy Intensity (kWh/MG) 1,908 0 0 1,355 0 -- 0 --

2025 Urban Water Management Plan Section 5: Water Supplies 5-18
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Table 5-11. Energy Intensity – Multiple Water Delivery Products (DWR Table O-1C) Water Delivery Type Production volume (AF) Total Utility (kWh/AF) Net Utility (kWh/AF) Retail Potable Deliveries 8,504 489.4 489.4
Retail Non-Potable Deliveries 568 614.4 614.4
Wholesale Potable Deliveries 0 0.0 0.0
Wholesale Non-Potable Deliveries 0 0.0 0.0
Agricultural Deliveries 0 0.0 0.0
Environmental Deliveries 0 0.0 0.0
Other 0 0.0 0.0
All Water Delivery Types 9,072 497.3 497.3
Quantity of Self-Generated Renewable Energy: 0 kWh
Data Quality: Combination of Estimates and Metered Data Data Quality Narrative: Data for this analysis was provided by the City and is based on estimates and metered data.

Narrative: The analysis includes energy use from production of potable water at the COBWTP, well production and pumping, and pumping of non-potable water supply. The "Extract and Divert" water management process includes energy consumption associated with well production and pumping as well and pumping of non-potable water supply. The "Treatment" water management process includes energy consumption associated with production and pumping of potable water at the COBWTP. Treatment and pumping energy consumption could not be broken up because all energy use is metered through a single meter.

Table 5-12. Energy Intensity – Wastewater & Recycled Water (DWR Table O-2) Urban Water Supplier: City of Brentwood
Start Date for Reporting Period: 1/1/2020 Urban Water Supplier Operational Control End Date: 12/31/2020 Water Management Process
Collection/
Conveyance Treatment
Discharge/
Distribution Total
Volume of Wastewater Entering Process (AF) 0 4,465 0 4,465 Wastewater Energy Consumed (kWh) 0 5,114,192 0 5,114,192 Wastewater Energy Intensity (kWh/AF) 0.0 3515 0.0 3,515 Volume of Recycled Water Entering Process (AF) 0 971 0 971 Recycled Water Energy Consumed (kWh) 0 1,476,729 0 1,476,729 Recycled Water Energy Intensity (kWh/AF) 0 4,667 0 4,667 Quantity of Self-Generated Renewable Energy: 0 kWh
Data Quality: Combination of Estimates and Metered Data Data Quality Narrative: Data for this analysis was provided by the City and is based on estimates and metered data.

Narrative: The City does not specifically track energy consumption to produce recycled water. Energy consumption for recycled water production was estimated based on the amount of recycled water produced relative to the total amount of wastewater that was collected and treated at the City WWTP.

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Section 6
Water Supply Reliability
Assessment
This section describes factors impacting long-term reliability of water supplies and provides a comparison of projected water supplies and demands.

6.1 Constraints on Water Sources
“[Provide a] detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change.
[…] The plan shall include information, to the extent practicable, relating to the quality of existing sources of water available to the supplier over the same five-year increments as described in subdivision (a) of Section 10631, and the manner in which water quality affects water management strategies and supply reliability” (CWC §§ 10631(b)(1)–10634).

This section describes water quality and quantity constraints in the two water supply sources:
surface water and groundwater. Water supply reliability is a crucial component of the water management planning process. Factors that may potentially impact the City’s water supply include environmental constraints, climatic factors, legal limitations, and water quality impacts as summarized in Table 6-1 and this section.

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Table 6-1. Factors Affecting Water Supply
Water Supply
Source Source Name Limitation Quantification Legal Environmental Water Quality Climatic Additional Information Surface Water
ECCID (Treated at

COBWTP)
Portion of contracted
4,823 MGY
Permanent
entitlement to
purchase
Catastrophic levee
breach could
compromise surface
water supply
Decreasing Delta
water quality at Rock
Slough Intake
High TDS and nitrate
levels could
compromise supply
Sea level rise and
extreme weather may
reduce water quality
more frequently and
for longer periods of
time throughout the
year.

Delta Conveyance
Project: CCWD and DWR
reached a legally binding
settlement which restricts
flow/pumping to protect
water quality and DWR
will pay for construction,
maintenance, and
operation of new facilities
required to offset water
quality As such, no
impacts are anticipated.

ECCID (Treated at
RBWTP)
Portion of contracted
4,823 MGY
Permanent
entitlement to
purchase
Permanent treatment
capacity share
Catastrophic levee
breach could
compromise surface
water supply
High chlorides, TDS,
and nitrate levels
could compromise
supply
Sea level rise and
extreme weather may
reduce water quality
more frequently and
for longer periods of
time throughout the
year.

Groundwater
San Joaquin
Groundwater Basin
(ECC Subbasin
5-22.19)

5.18 mgd firm
capacity
Possible future
limitations due to
SGMA
Significant subsidence
could shift basin into
overdraft and trigger
need to restrict
withdrawals
High TDS, Chloride,
and nitrate levels
could compromise
supply
Sea level intrusion
may increase the
chloride
concentrations and
further impact
withdrawal abilities
--
Recycled water City WWTP
5 mgd (current)

6.4 mgd (future)
SWRCB Order WQ
2016-0068-DDW --
If tertiary-level water
quality requirements
are not met, flows are
sent to a lined
reclamation pond
Sea level rise and
extreme weather may
reduce water quality
more frequently and
for longer periods of
time throughout the
year.
--

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-3
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document.

6.1.1 Constraints on Surface Water Sources
The surface water supplies available to the City are subject to water quality issues and potential climate change impacts. Historically, the City’s surface water is very reliable and the City has always had access to 100 percent of its surface water supply as a result of its pre-1914 water right. While water quality concerns and potential climate change impacts (See Section 3) could temporarily reduce upstream supplies, the ECCID pre-1914 water right with ECCID and long-standing history of reliable water deliveries provides assurance of water source reliability. The City’s surface water supply has high reliability (discussed further in Section 6.2) given the RBWTP and CBWTP treatment capabilities, CCWD emergency storage, and the ECCID pre-1914 water right.

6.1.2 Constraints on Groundwater Sources
Groundwater availability is generally unaffected by short-term drought conditions, and the City typically pumps groundwater at a similar rate during normal and dry years.

The ECC basin is generally in good condition, with stable groundwater levels reported by ECCGSA (ECCGSA, 2021). The City’s groundwater wells consistently meet primary and secondary drinking water standards (below MCLs and secondary MCLs). However, well-specific water quality issues have limited withdrawals from the 5.18 mgd firm capacity groundwater well field, resulting in an average production of 1.57 to 2.5 mgd recently (2022-2024). While the City’s groundwater pumping capacity is able to pump over 5,800 AFY, the reasonably available groundwater able to be used is only approximately 2,200 AFY due to water quality constraints for chloride in the wastewater treated effluent discharge. However, the wells can produce more water as needed if treated, rehabilitated, or replaced as there are no current basin limitations.

6.1.2.1 Basin Conditions
Overall, basin conditions are favorable.
• San Joaquin basin is not adjudicated
• Groundwater levels are stable.
• Over-pumping has not been determined per the groundwater level monitoring done by the ECC GSA per the latest GSP and the latest vertical groundwater gradient graph (ECCGSA, 2021).

The City is aware that future conditions may vary. Environmental factors, such as drought conditions, and water quality factors, such as groundwater contamination, have the potential to affect this resource adversely. The City is prepared to manage groundwater basin changes that may occur due to extended drought or potential effects of climate change adaptively via well treatment, rehabilitation, and replacement.

6.1.2.2 Groundwater Water Quality
While water quality in the City aquifer is generally adequate, high levels of TDS, chlorides, and nitrate can be found in the City aquifer, as described in Section 5.2.1. The City’s five active wells are below 20 mg/L nitrate as NO3, with average concentrations at 3.5 mg/L (City of Brentwood, 2019b). As a result, the City currently averages 1.57 mgd production from their wells in recent years (2022-2024) compared to the 5.15 mgd firm capacity due to water quality issues. However, the City has planned for on-site chlorination system installations to replace the previous sodium hypochlorite treatment generators for their fiscal year 2026/27 capital improvement program. If needed, well rehabilitation, replacement, or treatment projects can be completed to restore groundwater well production.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-4
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6.2 Reliability by Type of Year
“[Provide a] detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change” (CWC §§ 10631(b)(1)).

This section describes the reliability of the City’s various water supply sources and their vulnerability to seasonal or climatic shortages. The definitions of the three water-year types as described by DWR are provided below.

1. Normal year is a year in the historical sequence that most closely represents median runoff levels and patterns. Average is defined as the median runoff over the previous 30 years or more.

2. Single-dry year is generally considered to be the lowest annual runoff for a watershed since the water year beginning of measurements in 1903.

3. Five-Consecutive-year drought period is generally considered to be the lowest average runoff for a consecutive five-year period for a watershed since 1903.

The City has always met system water demand, regardless of regional hydrology. The City expects no reductions from normal‐year supply during single or multiple dry years. Appropriate base years for the City would be 2004 as an average year, 1977 as a single dry year, and 1929 to 1933 as multiple dry years. Table 6-2 presents the City’s basis of water year data.

Table 6-2. Bases of Water Year Data (Reliability Assessment) (DWR Table 7-1) - Surface Water (ECCID) Year Type Base Year Volume Available, AFY Percentage of Average Supply Normal year 2004 14,800 100%
Single-dry year 1977 14,800 100%
Consecutive-dry years 1st year 1929 14,800 100%
Consecutive -dry years 2nd year 1930 14,800 100%
Consecutive -dry years 3rd year 1931 14,800 100%
Consecutive -dry years 4th year 1932 14,800 100%
Consecutive -dry years 5th year 1933 14,800 100%
Based on historical data, the City’s water supply available from groundwater has not been impacted by normal or dry years. In dry years the groundwater levels may decline, but this does not reduce the pumping capacity of the City’s wells. Groundwater reliability is consistent in all water years and not subject to vulnerabilities to seasonal and climatic shortage as shown in Table 6-3.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-5
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Table 6-3. Bases of Water Year Data (Reliability Assessment) (DWR Table 7-1) - Groundwater Year Type Base Year Volume Availablea, AFY Percentage of Average Supply Normal year 2004 2,200 100%
Single-dry year 1977 2,200 100%
Consecutive-dry years 1st year 1929 2,200 100%
Consecutive -dry years 2nd year 1930 2,200 100%
Consecutive -dry years 3rd year 1931 2,200 100%
Consecutive -dry years 4th year 1932 2,200 100%
Consecutive -dry years 5th year 1933 2,200 100%
a. Reasonably available volume from Table 5-9.

6.3 Supply and Demand Comparison
“Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and multiple dry water years.

The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier” (CWC §§ 10635(a)).

This section provides a comparison of normal, single-dry, and multiple-dry water year supply and demand for the City. Section 4 previously addressed water demands and Section 5 addressed water supplies.

The comparison of current and projected water supply and demand demonstrates the ability of a supplier to accommodate a city’s water demands during an average water year as well as those years with water shortages. As shown in the tables, the supply is adequate to meet the projected demand across all year types.

Data presented in Table 6-4 compares the normal water year current and projected water supplies to the current and projected demand for the City.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-6
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Table 6-4. Normal Year Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-2) Supply 2030 2035 2040 2045 2050
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totals 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471
Units: AFY
a. Reasonable available volume supply from Table 5-9
b. Potable demand from Table 4-5
c. Recycled water demand from Table 5-4
The current and projected water supplies are compared to the demands for a single dry year for the City in Table 6-5.

Table 6-5. Single Dry Year Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-3) Supply totals 2030 2035 2040 2045 2050
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totalsb 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471
Units: AFY
a. Reasonable available volume supply from Table 5-9
b. Potable and raw demand from Table 4-5
c. Recycled water demand from Table 5-4
Table 6-6 presents projections for water supply compared to the demands for multiple dry years for the City.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-7
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Table 6-6. Multiple Dry Years Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-4) 2030 2035 2040 2045 2050
First year
Supply
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totals 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471
Second year
Supply
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totals 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471
Third year
Supply
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totals 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471
Fourth year
Supply
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totals 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-8
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Table 6-6. Multiple Dry Years Supply and Demand Comparison, Water Code Section 10635 (a) (DWR Table 7-4) 2030 2035 2040 2045 2050
Fifth year
Supply
Surface Water (ECCID) a 14,800 14,800 14,800 14,800 14,800 Groundwater a 2,200 2,200 2,200 2,200 2,200
Recycled Water a 1,612 1,780 1,869 1,959 1,988
Supply totals 18,612 18,780 18,869 18,959 18,988
Potableb 10,673 11,158 11,760 12,362 12,529
Recycled Waterc 1,612 1,780 1,869 1,959 1,988
Demand totals 12,286 12,938 13,630 14,321 14,517
Difference 6,327 5,842 5,240 4,638 4,471
Units: AFY
a. Supply from Table 5-9
b. Potable demand from Table 4-5
c. Recycled water demand from Table 5-4

6.4 Water Supply Reliability Management Tools and Options “An urban water supplier shall describe in the plan water management tools and options used by that entity that will maximize resources and minimize the need to import water from other regions” (CWC §§ 10620(f)).

The City has been proactive in participating in a GSA under SGMA regulations as discussed in Section 5. The City has actively increased its use and distribution facilities for recycled water as discussed in Section 5. The City's implementation of water use efficiency DMMs discussed in Section 8 is key to the City’s water supply reliability.

Through these activities the City is improving their water supply reliability and reducing reliance on the Delta consistent with the Delta Plan. The Sacramento-San Joaquin Delta Reform Act of 2009 (Delta Reform Act) established two co-equal goals of providing a more reliable water supply for California and protecting, restoring, and enhancing the Delta ecosystem. As part of the Delta Reform Act, the Delta Stewardship Council (DSC) was created who then developed and adopted the Delta Plan in 2013. The Delta Plan is a comprehensive, long-term, legally enforceable plan guiding how federal, state, and local agencies manage the Delta’s water and environmental resources. Included in the Delta Plan is Delta Plan Policy WR P1, Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance (WR P1).

WR P1 is relevant to any state or local public agency that anticipate participating in or receiving water from a proposed covered action such as a multi-year water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Delta. Prior to initiating the implementation of that action, agencies must prepare a written certification of consistency with detailed findings as to whether the covered action is consistent with applicable Delta Plan policies and submit that certification to the DSC. WR P1 identifies UWMPs as the tool to demonstrate consistency with state policy to reduce reliance on the Delta for an agency that carries out or takes part in a covered action. The City’s reduced Delta reliance reporting is provided in Appendix E.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-9
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6.5 Drought Risk Assessment
“Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service to its customers as part of information considered in developing the demand management measures and water supply projects and programs to be included in the urban water management plan. The urban water supplier may conduct an interim update or updates to this drought risk assessment within the five-year cycle of its urban water management plan update. The drought risk assessment shall include each of the following: […] (4) Considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria” (CWC §§ 10635(b)(1)–10635(b)(4)).

This DRA includes a description of the data and methods used, basis for the supply shortage conditions, determination of the reliability of each source, and comparison of the total water supplies and uses during the drought.

6.5.1 City Actions
Climate change is expected to lead to an increase in the frequency and severity of drought. In 2015 when the state was in the midst of its fourth straight year of drought, Governor Jerry Brown issued Executive Order B-29-15 mandating statewide reductions in water use for the first time. In response to the Governor’s Executive Order and the subsequent SWRCB drought regulations, the City adopted a Resolution at their April 28, 2015 Council meeting requiring customers to reduce potable water use by 35 percent relative to the amounts they used in 2013. Besides implementing the mandatory restrictions set by the State, the City increased the frequency of their water conservation workshops and disseminated additional information to the public encouraging water conservation. Penalties were levied to those customers that were non-compliant with the mandatory 35 percent reduction.

While the City’s water reduction mandates have since been levied, the City continues its proactive efforts to optimize water use. These efforts are reflected in the projected water demands presented in Section 4 of this UWMP.

6.5.2 Basis for Water Shortage Condition
As described in Section 5, the City’s water supply consists of surface water from the Delta, groundwater from the ECC Subbasin, and recycled water. The reliability of the City’s surface water supplies is relatively high since the permanent purchase entitlement from which the City’s supplies stem are protected by pre-1914 water rights, which historically have not been subject to delivery reductions during water shortages, including regulatory restricted and drought years. The City’s groundwater supply also appears to be fairly reliable. Historical conditions as reflected by available data for the ECC Subbasin indicate that the groundwater system has no apparent overdraft, suggesting that historical extraction patterns have not exceeded the safe yield of the basin.

As discussed in Section 3.3, climate change has the potential to lessen some of this reliability. There is concern that climate change-related sea-level rise and extreme weather can adversely impact access and the quality of surface water supplies from the Delta. For groundwater, water quality factors, such as groundwater contamination and or new pumping limitations instilled by the GSP process could alter the availability of this resource. While the City has been able to mitigate any changes to their water supplies through conservation measures and an increased use of recycled water, these are the key issues that were utilized as drivers for the shortage condition considered in this DRA. The analysis considers the following:

1. Reduction in water supplies from the Delta

2. Reduced availability of groundwater supply due to water quality concerns

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-10
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The reliability assumptions of each of the City’s supply sources under this drought related shortage condition scenario are described in Section 6.5.2.

6.5.3 DRA Water Source Reliability
The reliability of each supply source under the drought related shortage condition scenario for shortage conditions listed in Section 6.5.2 is summarized in Table 6-7. For the DRA, it is assumed that the shortage condition scenario would result in a reduction of the “Reasonably Available Volume” supply that was outlined in Table 6-9.

Table 6-7. DRA Water Source Reliability
DRA Scenario
Surface Water
Volume Available,
AFY a
Groundwater
Volume Available
AFY b
Recycled
Water
Available,
AFY
Total Assumptions
Reduction in water
supplies from the Delta
combined with a
reduced availability of
groundwater due to
water quality concerns.
11,840 1,100 1,612 14,552
Assumed a 20% reduction in Delta
water supplies and a 50% reduction
in groundwater supply. Recycled
water supply was assumed to remain
unchanged.
a. Refers to all supplies stemming from the ECCID purchase entitlement of 4,823 MGY (14,800 AFY). b. Groundwater wells are currently limited by water quality, but the wells can produce more water as needed if treated. Per the latest GSP, there are currently no basin overdraft declarations or withdrawal limitations.

6.5.4 Total Water Supply and Use Comparison
Table 6-8 is the DRA total water supply and use comparison. It is based on the scenario described in Table 6-7. It calculates the potential supply shortages (or surplus), and allows the City to include shortfall mitigation from WSCP demand reduction measures and supply augmentation as necessary.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-11
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Table 6-8. 5-Year DRA, Water Code Section 10635 (b)(3) (DWR Table 7-5) 2026 Total Notes
Gross Water Use 13,191
The City’s estimated potable 2030 demand from Table 4-5 (10,673) plus recycled water demand from Table 5-4 (1,612 AF) combined with an additional 906 AFY of water use that would occur if Stage 1 demand reduction activities (Table 7-2) are not in place.

Total Supplies 14,552 Projected water supply available to the City after the water supply reductions summarized in Table 6-7.

Surplus/Shortfall without WSCP Action 1,361 Surplus
Planned WSCP Actions (use reduction and
supply augmentation)
WSCP -supply augmentation benefit -
WSCP - use reduction savings benefit -
Revised Surplus/(shortfall) -
Resulting % Use Reduction from WSCP action -
2027 Total Notes
Gross Water Use 13,191
The City’s estimated potable 2030 demand from Table 4-5 (10,673) plus recycled water demand from Table 5-4 (1,612 AF) combined with an additional 906 AFY of water use that would occur if Stage 1 demand reduction activities (Table 7-2) are not in place.

Total Supplies 14,552 Projected water supply available to the City after the water supply reductions summarized in Table 6-7.

Surplus/Shortfall without WSCP Action 1,361 Surplus
Planned WSCP Actions (use reduction and
supply augmentation)
WSCP -supply augmentation benefit -
WSCP - use reduction savings benefit -
Revised Surplus/(shortfall) -
Resulting % Use Reduction from WSCP action -
2028 Total Notes
Gross Water Use 13,191
The City’s estimated potable 2030 demand from Table 4-5 (10,673) plus recycled water demand from Table 5-4 (1,612 AF) combined with an additional 906 AFY of water use that would occur if Stage 1 demand reduction activities (Table 7-2) are not in place.

Total Supplies 14,552 Projected water supply available to the City after the water supply reductions summarized in Table 6-7.

Surplus/Shortfall without WSCP Action 1,361 Surplus
Planned WSCP Actions (use reduction and
supply augmentation)
WSCP -supply augmentation benefit -
WSCP - use reduction savings benefit -
Revised Surplus/(shortfall) -
Resulting % Use Reduction from WSCP action -

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-12
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Table 6-8. 5-Year DRA, Water Code Section 10635 (b)(3) (DWR Table 7-5) 2029 Total Notes
Gross Water Use 13,191
The City’s estimated potable 2030 demand from Table 4-5 (10,673) plus recycled water demand from Table 5-4 (1,612 AF) combined with an additional 906 AFY of water use that would occur if Stage 1 demand reduction activities (Table 7-2) are not in place.

Total Supplies 14,552 Projected water supply available to the City after the water supply reductions summarized in Table 6-7.

Surplus/Shortfall without WSCP Action 1,361 Surplus
Planned WSCP Actions (use reduction and
supply augmentation)
WSCP -supply augmentation benefit -
WSCP - use reduction savings benefit -
Revised Surplus/(shortfall) -
Resulting % Use Reduction from WSCP action -
2030 Total Notes
Gross Water Use 13,191
The City’s estimated potable 2030 demand from Table 4-5 (10,673) plus recycled water demand from Table 5-4 (1,612 AF) combined with an additional 906 AFY of water use that would occur if Stage 1 demand reduction activities (Table 7-2) are not in place.

Total Supplies 14,552 Projected water supply available to the City after the water supply reductions summarized in Table 6-7.

Surplus/Shortfall without WSCP Action 1,361 Surplus
Planned WSCP Actions (use reduction and
supply augmentation)
WSCP -supply augmentation benefit -
WSCP - use reduction savings benefit -
Revised Surplus/(shortfall) -
Resulting % Use Reduction from WSCP action -

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-13
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The basis of the key inputs in the DRA water supply and use comparison are described below. In all DRA years the City has a surplus of supplies.

Gross water use – The City’s projected water use from 2026 through 2030. These demands are from the 2030 demand projections in Section 4 plus the recycled water demand for 2030 in Section 5 (Table 5-4) combined with water use that would occur if Stage 1 demand reduction activities (Table 7-2) are not in place. The gross water use included in this DRA does not include water use reduction as a result of the implementation of any demand reduction actions by WSCP stage described in Section 7.

Total supplies – Projected water supply available to the City after the water supply reductions summarized in Table 6-7.

Surplus/shortfall without WSCP action – Total supplies minus gross water use prior to any demand reduction or supply augmentation actions from the WSCP.

WSCP–supply augmentation benefit – Sum of estimated supply augmentation benefit in the required WSCP stage.

WSCP–use reduction savings benefit – Sum of estimated water savings from demand reduction actions in the required WSCP stage.

Revised Surplus/(shortfall) – Total supplies including supply augmentation benefit minus total demands including demand reductions from relevant WSCP stage.

Resulting percent use reduction from WSCP action – WSCP–use reduction savings benefit divided by Gross Water Use.

2025 Urban Water Management Plan Section 6: Water Supply Reliability Assessment 6-14
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7-1
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Section 7
Water Shortage Contingency
Planning
“Every urban water supplier shall prepare and adopt a water shortage contingency plan as part of its urban water management plan that consists of each of the following elements: […]” (CWC §§ 10632(a)).

The WSCP defines how the City will act in the case of an actual water shortage. A water shortage means that the water supply available is insufficient to meet the normally expected customer water use at a given point in time. The WSCP provides pre-planned guidance for managing and mitigating a potential shortage of water supply.

The WSCP is an element of the City’s UWMP and updated every five years in accordance with state law. The City’s WSCP is consistent with provisions in the state regulations pertaining to water planning in Water Code Section 10632. The WSCP consists of the following elements and are discussed in this section.
• Water Supply Reliability Analysis
• Annual Water Supply and Demand Assessment Procedures
• Six Standard Water Shortage Stages
• Shortage Response Actions
• Special Water Feature Distinction
• Communication Protocols
• Compliance and Enforcement
• Legal Authorities
• Financial Consequences of WSCP
• Monitoring and Reporting
• WSCP Refinement Procedures
• WSCP Adoption, Submittal, and Availability

7.1 Water Supply Reliability Analysis
“The analysis of water supply reliability conducted pursuant to Section 10635” (CWC §§ 10632(a)(1)).

The water supply reliability analysis of the City’s supplies is summarized. The key issues that may create a shortage condition relative to the City’s water supply portfolio are described.

7.1.1 Water System Reliability
As discussed in Sections 5 and 6 of this UWMP, the City’s water supply consists of surface water from the Delta, groundwater from the ECC Subbasin, and recycled water. The reliability of the City’s surface water supply is relatively high and historically have not been subject to delivery reductions during water shortages, including regulatory restrictions and drought years. The City’s groundwater

2025 Urban Water Management Plan Section 7: Water Shortage Contingency Planning 7-2
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The comparison of current and projected water supply and demand conducted as part of the water supply reliability assessment (Section 6) shows that the City water supply is adequate to meet the projected demand across all year types.

7.1.2 Key Issues to Potential Shortage Condition
As discussed in Section 6 of this UWMP, the reliability of the City’s water supply is relatively high.

However, there are issues that could result in the City declaring a water shortage stage condition.

Below is a list of the key issues that could potentially result in a shortage condition for the City. • Statewide climate influences including Governor Executive Order related to water supply reduction (regulatory driven shortage)
• Availability of Delta surface water supplies
− Climate change-related sea-level rise and extreme weather − Water quality conditions/contamination
− Mechanical breakdown of surface water diversion structure, intake, or WTP facilities • Impacted groundwater supply
− Declining groundwater levels
− GSP sustainable groundwater pumping limitations (this would be due to future potential condition in GSP updates, as there are no current limitations in place) − Contamination of multiple wells
− Multiple well failures
− System-wide power failure
Some of these issues were utilized as drivers for the shortage condition considered in the DRA that is included in Section 6 of the UWMP. In all DRA years, the City was found to have a surplus of water supplies.

7.2 Annual Water Supply and Demand Assessment Procedures “An urban water supplier shall conduct an annual water supply and demand assessment pursuant to subdivision (a) of Section 10632 and, on or before July 1 of each year, submit an annual water shortage assessment report to the department with information for anticipated shortage, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent with the supplier’s water shortage contingency plan. An urban water supplier that relies on imported water from the State Water Project or the Bureau of Reclamation shall submit its annual water supply and demand assessment within 14 days of receiving its final allocations, or by July 1 of each year, whichever is later” (CWC §§ 10632.1).

The annual water supply and demand assessment is conducted annually on or before July 1 of each year. The Annual Assessment report is submitted to DWR with information for anticipated shortage, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent with this WSCP.

2025 Urban Water Management Plan Section 7: Water Shortage Contingency Planning 7-3
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7.2.1 Evaluation Criteria
The Annual Assessment determination will be based on considerations of unconstrained water demand, available water supplies, and infrastructure considerations. Since shortages are based on the difference between expected water supplies and unconstrained demand under current year and dry year conditions, the locally-applicable evaluation criteria to be used in the Annual Assessment for determining a shortage include the following:
• Depiction of current year and subsequent dry year based on best-available data, including anticipated hydrologic conditions
• Current and subsequent dry year unconstrained demand for the City’s customers considering weather, growth, and other influencing factors
• Estimation of available water supply for current and subsequent dry year

7.2.2 Decision Making Process
The City will conduct an Annual Assessment that follows the steps illustrated in Figure 7-1 and described below.

Figure 7-1. Annual assessment procedure and decision making process Step 1. Estimate Unconstrained Customer Demand - Current year unconstrained demand considering weather, growth, and other influencing factors such as policies to manage current supplies to meet demand objectives in future years, as applicable is estimated. Unconstrained customer demand does not include demand reductions that may occur as a result of the City implementing any special shortage response actions that may be necessary.

Step 2. Estimate Available Water Supply - The available water supply by source is estimated for the current year and one subsequent dry year:
• Quantify each source of water supply and provide descriptive text of each source • Quantify current year available supply by source, this includes coordinating with ECCID and CCWD and considerations for hydrological and regulatory conditions in the current year • Quantify available supply by source for one subsequent dry year

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− The existing infrastructure capabilities and plausible constraints as they impact the City’s ability to deliver supplies to meet expected customer water use needs in the coming year should be considered
− Specific locally applicable factors that can influence or disrupt each supply source Step 3. Compare Projected Water Supplies to Demands – The estimated water supplies identified in the Annual Assessment will represent the water demand that can be met after factoring in the considerations noted in Step 2.

Step 4. Identify and Quantify Anticipated Water Supply Shortages, if any – The estimated water supplies in comparison to unconstrained water demands will identify and quantify any anticipated water shortages. Depending on the extent of the projected shortage, the appropriate shortage stage will be selected.

Step 5. Develop Draft Annual Assessment Report – The City compiles the draft Annual Assessment report based on the format to be determined by DWR using the key data inputs and evaluation criteria.

Step 6. Review Draft Annual Assessment Report – The City will review and provide comment on the draft Annual Assessment report.

Step 7. Address Comments to the Draft Annual Assessment Report, Finalize Report – The City will address internal comments to the draft Annual Assessment report and will finalize the report.

Step 8. Submit Annual Assessment Report to DWR – The City will submit the Annual Assessment report to DWR.

7.3 Six Standard Water Shortage Stages
“(A) Six standard water shortage levels corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages and greater than 50 percent shortage. Urban water suppliers shall define these shortage levels based on the suppliers’ […] (B) An urban water supplier with an existing water shortage contingency plan that uses different water shortage levels may comply with the requirement in subparagraph (A) by developing and including a cross-reference relating its existing categories to the six standard water shortage levels” (CWC §§ 10632(a)(3)(A)–10632(a)(3)(B)).

The City has a six-stage WSCP, as shown in Table 7-1, to invoke during declared water shortages.

The six standard water shortage levels correspond to progressively increasing estimated shortage conditions and align with the response action the City would implement to meet the severity of the impending shortages. Triggering from one WSCP stage to the next is done at the recommendation of the Director of Public Works. Factors to take into consideration include decreases in water allotments from the water supply provider, from reductions in infrastructure capacity related to the water treatment plants, pipelines or water treatment plants, or climate or from state political conditions that would impact the allotment of water supply.

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Table 7-1. Cross-reference for Standard vs Supplier Shortage Levels, Water Code Section 10632(a)(3)(B) (DWR Table 8-1) Standard
Shortage
Levels
Percent Shortage
Range
Water Shortage Condition
(Narrative Description)
1 Up to 10% Water supply conditions are sufficient to meet between 90 to 100% of projected unconstrained demand.
2 Up to 20% Water supply conditions are sufficient to meet between 80 to 90% of projected unconstrained. 3 Up to 30% Water supply conditions are sufficient to meet between 70 to 80% of projected unconstrained demand. 4 Up to 40% Water supply conditions are sufficient to meet between 60 to 70% of projected unconstrained demand. 5 Up to 50% Water supply conditions are sufficient to meet between 50 to 60% of projected unconstrained demand. 6 >50% Water supply conditions are sufficient to meet less than 50% of projected unconstrained demand.

7.4 Shortage Response Actions
“[Provide] shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following: […]” (CWC §§ 10632(a)(4)).

The City’s shortage response actions include demand reduction actions, supply augmentation actions, operational changes, locally appropriate mandatory prohibitions against specific water use practices, and consideration of state mandated prohibitions. For each activity the extent to which the gap between supplies and demand will be reduced by each shortage response action is estimated.

As the water purveyor, the City must provide the minimum health and safety water needs of the community at all times. The objective is to design the WSCP so that the demand reduction and supply augmentation activities in each stage reduce the shortage by the percent shortage range for each stage. Table 7-2 provides a summary of the estimated water savings from the demand reduction and supply augmentation activities in each stage.

Sections 7.4.1 and 7.4.2 provide detailed information as to the activities and the estimated savings for each activity.

Table 7-2. Summary of Demand Reduction, Supply Augmentation, and Other Actions in WSCP by Shortage Level WSCP Mandated Shortage Level
(% shortage):
1 (0 to 10%)
2 (10 to
20%)
3 (20 to 30%)
4 (30 to 40%)
5 (40 to
50%)
6 (>50%)
Total demand reduction and other activities
(AFY) (from Table 8-3 and Table 8-4) 833 2,352 3,572 4,750 4.852 5,641 Total Supply Augmentation (acre feet per year
(AFY)) (from Table 8-4) -- -- -- -- -- --
Total demand reduction and supply
augmentation (AFY) 833 2,352 3,572 4,750 4.852 5,641
Total 2024 retail demand (AFY) 10,906 10,906 10,906 10,906 10,906 10,906 Percent of demand 8% 22% 33% 44% 44% 52%

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7.4.1 Demand Reduction Actions
Locally appropriate demand reduction actions to adequately respond to shortages are specified in Table 7-3. Priorities for use of available potable water during shortages are based on the difference between basic needs (e.g. drinking, toilet flushing) and discretionary uses (e.g. landscape irrigation), and legal requirements set forth in the CWC, Sections 350-358. Water allocations are established for all customers according to the following:
• Minimum health and safety allocations for interior residential needs (includes single-family, multifamily, hospitals and convalescent facilities, retirement and mobile home communities, and firefighting and public safety)
• Commercial, industrial, institutional/governmental operations (where water is used for manufacturing and for minimum health and safety allocations for employees and visitors), to maintain jobs and economic base of the community (not for landscape uses) • Existing landscaping
• New customers, proposed projects without permits when shortage declared In 2011, the City adopted the current Municipal Code Section 17.630, which addresses landscaping and irrigation for new construction of homes, commercial, and industrial facilities. This code is a proactive means of reducing the water demand in the City. Restrictions in Level 1 are always in place per City Municipal Code 14.01.510, Conservation – Water waste prohibited (Appendix F). Should drought conditions warrant mandatory reductions, during Level 2 of a water supply shortage, the City may adopt and implement an ordinance for mandatory conservation and water restriction plan. This ordinance may require a drought surcharge for the City to enforce the plan.

The estimated annual volume of water that the demand reduction action will reduce the shortage gap by is included in Table 7-3 as is any note of a penalty, charge, or other enforcement for each demand reduction action. The assumptions and references for the estimated volume by demand reduction action items is provided in Appendix N.

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Table 7-3. Demand Reduction Actions, Water Code Section 10632(a)(4)(B) and (E) (DWR Table 8-3) Shortage
Level
Demand Reduction
Actions
How much is this going to reduce
the shortage gap?
Additional Explanation or Reference
Penalty, Charge,
or Other
Enforcement?
For Retail
Suppliers Only
Volume or
Percentage
Shortage Gap
Reduction Value
AF
1 Landscape - Restrict or
prohibit runoff from
landscape irrigation
Volume 100
The application of potable water to
outdoor landscapes in a manner that
causes runoff such that water flows onto
adjacent property, non-irrigated areas,
private and public walkways, roadways,
parking lots, or structures is prohibited.

Yes
1 Other - Require automatic
shut of hoses Volume 37 -- Yes
1 Other - Prohibit use of
potable water for washing
hard surfaces
Volume 74
Cleaning of
streets/sidewalks/walkways/parking
areas/patios/porches or verandas.

Yes
1 Other - Customers must
repair leaks, breaks, and
malfunctions in a timely
manner
Volume 326 -- Yes
1 Water Features - Restrict
water use for decorative
water features, such as
fountains
Volume 37
The use of potable water in a fountain or
other decorative water feature, except
where the water is part of a recirculating
system is prohibited.

Yes
1 CII - Restaurants may only
serve water upon request Volume 2 -- Yes
1 Landscape - Limit
landscape irrigation to
specific days 48 hours
after rain
Volume 249
The application of potable water to
outdoor landscapes during and up to
forty-eight hours after a measurable
rainfall is prohibited.

Yes
1 CII - Lodging
establishment must offer
opt out of linen service
Volume 2
To promote water conservation,
operators of hotels and motels shall
provide guests with the option of
choosing not to have towels and linens
laundered daily. The hotel or motel shall
prominently display notice of this option
in each guestroom using clear and easily
understood language.

Yes
2 Landscape - Prohibit
certain types of landscape
irrigation
Volume 73
The use of potable water to irrigate
ornamental turf on public street medians
is prohibited.

Yes
2 Other - Prohibit vehicle
washing except at facilities
using recycled or
recirculating water
Volume 2 -- Yes
2 Landscape - Prohibit
certain types of landscape
irrigation
Volume 77 Watering lawns and landscapes is
prohibited at City facilities. Yes
2 Landscape - Limit
landscape irrigation to
specific times
Volume 299
Prohibitions on time and day for
residential & commercial outdoor
irrigation.

Yes

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Table 7-3. Demand Reduction Actions, Water Code Section 10632(a)(4)(B) and (E) (DWR Table 8-3) Shortage
Level
Demand Reduction
Actions
How much is this going to reduce
the shortage gap?
Additional Explanation or Reference
Penalty, Charge,
or Other
Enforcement?
For Retail
Suppliers Only
Volume or
Percentage
Shortage Gap
Reduction Value
AF
2 Other Volume 249 Irrigation of non-permanent agriculture is prohibited. Yes
2 Other Volume 249 Excessive watering resulting in gutter flooding is prohibited. Yes
2 Offer water use surveys Volume 163 Expand the notification of the availability of free water use evaluations. Yes
3 CII - Other CII restriction or
prohibition Volume 5 Car wash facilities must use recycled water. Yes 3 CII - Other CII restriction or
prohibition Volume 5 Prohibit new car washes or laundries without recirculating water systems. Yes 3 Pools - Allow filling of
swimming pools only when
an appropriate cover is in
place.

Volume 148 -- Yes
3 Landscape – Limit
landscape irrigation to
specific days
Volume 555
Prohibitions on time and day for
residential & commercial outdoor
irrigation.

Yes
4 Increase Water Waste
Patrols Volume 148 Use of City water for filling pools, ponds, or spas is prohibited Yes 4 Moratorium or Net Zero
Demand Increase on New
Connections
Volume 82
Assumes no commitments will be
provided for new water service
connections until the City has returned,
at a minimum, to Stage 3 restrictions.

The City reserves the right to limit or
refuse new service connections,
Yes
4 Landscape – Limit
landscape irrigation to
specific days
Volume 1,494
Prohibitions on time and day for
residential & commercial outdoor
irrigation.

Yes
5 Landscape – Prohibit all
landscape irrigation Volume 1,992
Prohibitions on time and day for
residential & commercial outdoor
irrigation.

Yes
6 Landscape – Prohibit all
landscape irrigation Volume 2,994
Prohibitions on time and day for
residential & commercial outdoor
irrigation.

Yes
CII = commercial, industrial, and institutional

7.4.2 Supply Augmentation and Other Actions
Locally appropriate supply augmentation actions and operational changes are listed in Table 7-4.

The assumptions and references for the estimated volume by demand reduction action items is provided in Appendix N.

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Since the City’s existing water supplies have already been integrated into normal water management planning for shortage conditions as described in Section 6 of the UWMP, it is not indicated as a response triggered by a WSCP shortage level in this section, but already represented in the determination of any gap between supply and customer water use.

Table 7-4. Supply Augmentation and Other Actions, Water Code Section 10632(a)(4)(A),(C), and (E) (DWR Table 8-2) Shortage
Level
Supply Augmentation
Methods and Other Actions
by Water Supplier
How much is this going to reduce the shortage
gap? Include volume units used.

Additional Explanation or
Volume or Reference
Percentage
Shortage Gap Reduction
Value
AF
All Stages Expand Public Information
Campaign Volume 408
Communication methods such as
workshops, bill messages,
Brentwood Press, or other
communication methods.
3 – 6 Implement or Modify Drought
Rate Structure or Surcharge Volume 816 Penalties and fines for excessive water use implemented.

7.4.3 Special Water Feature Distinction
“For purposes of developing the water shortage contingency plan pursuant to subdivision (a), an urban water supplier shall analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas, as defined in subdivision (a) of Section 115921 of the Health and Safety Code” (CWC §§ 10632 (b)).

Water features that are not pools or spas are analyzed and defined separately from pools and spas in the WSCP. Non-pool or non-spa water features including ponds, lakes, waterfalls, and fountains that do not require the use of potable water for health and safety considerations, are defined as decorative water features and recreational water features and are included as such in the response actions and are enforced and monitored as part of the WSCP process.

Under all conditions and shortage levels the WSCP prohibits using potable water in an ornamental fountain or other decorative water feature, except where the water is part of a recirculating system.

At Level 3, all decorative water features that use potable water must be drained and kept dry.

7.5 Emergency Response Plan
The City is part of and maintains a regional Emergency Response Plan (ERP) to address responding to catastrophic supply interruptions as well as other emergencies. Due to security reasons, only the ERP Table of Contents is included in this document in Appendix G.

Some of the shortage response actions included in Table 7-2 may also be utilized to respond to catastrophic water shortages. When a shortage declaration appears imminent, the Director of Public Works is in charge of managing related activities. The Director of Public Works coordinates efforts with the City Manager and other departments including fire, planning, police, parks and recreation, and the City Manager’s Office.

The City has sufficient facilities and infrastructure to reroute around a temporary disruption.

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Under the regional ERP, member agencies can request mutual aid for sharing resources with other water agencies including labor, materials, or potable water to facilitate rapid, short-term deployment of support prior to, during, or after an event. These mutual aid benefits are particularly useful should a shortage be caused by a power outage or other natural disaster. All existing water supply storage, treatment, and distribution infrastructure is inspected per a maintenance schedule. These same procedures apply to all wastewater treatment facilities as well. The City will coordinate with any city or county which it provides water for the possible proclamation of a local emergency.

Table 7-5 summarizes possible water supply catastrophes that could impact the City. Potential actions and responses are found in Table 7-6.

Table 7-5. Possible Catastrophes
• Earthquake
• Fire/explosion
• Medical
• Flood
• Tornado/severe weather
• Bomb threat
• Hard freeze
• Loss of normal water supply
• Hazardous material release
• Contamination of City water supplies
• Terrorist attack
• Vandalism
• Power outage
Table 7-6. Potential Actions in Response to Catastrophes • Stretch existing water storage
• Obtain additional water supplies
• Develop alternative water supplies
• Determine where the funding will come from
• Contact and coordinate with other agencies
• Create an emergency response team/coordinator
• Implement the ERP
• Put employees/contractors on-call
• Develop methods to communicate with the public
• Develop methods to prepare for water quality interruptions

7.6 Seismic Risk Assessment and Mitigation Plan
“(a) In addition to the requirements of paragraph (3) of subdivision (a) of Section 10632, beginning January 1, 2020, the plan shall include a seismic risk assessment and mitigation plan to assess the vulnerability of each of the various facilities of a water system and mitigate those vulnerabilities. […] (c) An urban water supplier may comply with this section by submitting, pursuant to Section 10644, a copy of the most recent adopted local hazard mitigation plan or multihazard mitigation plan under the federal Disaster Mitigation Act of 2000 (Public Law 106-390) if the local hazard mitigation plan or multihazard mitigation plan addresses seismic risk” (CWC §§ 10632.5).

This section includes a seismic risk assessment and mitigation plan to assess the vulnerability of each of the water system’s facilities and methods to mitigate those vulnerabilities. The City’s seismic risk assessment will be updated every 5 years when updating the UWMP. Water suppliers may also comply with 2025 UWMP requirements by submitting a copy of the most recent adopted local hazard mitigation plan (HMP) or multihazard mitigation plan under the federal Disaster Mitigation Act of 2000 (Public Law 106-390) if the local HMP or multihazard mitigation plan addresses seismic risk.

The City has prepared a confidential risk and resilience assessment in compliance with America’s Water Infrastructure Act of 2018 (AWIA) Public Law 115-270, S. 3021. A summary of the risk of earthquake to the City’s facilities is discussed below. Note that the Risk and Resilience Assessment (RRA) is not included as an appendix this UWMP due to security concerns, but the Contra Costa County Hazard Mitigation Plan (HMP) is available in complying with 2025 UWMP requirements. Due to the large size of the HMP document only the cover and table of contents pages are included in

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Appendix H. The full document can be accessed at https://www.contracosta.ca.gov/6842/DraftLocal-Hazard-Mitigation-Plan-Update, to view the plan for the entire County.

The AWIA law requires a community water system (CWS) serving more than 3,300 people to develop an RRA and an ERP. CWSs serving a population of 50,000 or more, such as the City, were originally required to conduct an RRA and submit certification of its completion to the US Environmental Protection Agency by December 31, 2020. The deadline for completing and certifying the ERP was fixed at six months following the RRA certification. The City updated and recertified their RRA by the December 31, 2025 deadline. They are in the process of updating the ERP by June 2026. As part of the RRA and ERP, the City evaluated seismic risk to its facilities and mitigation measures to reduce the impacts of the earthquake threat.

Earthquake damage can include structural, injury, loss of life, and infrastructure damage, and can vary in degrees based on factors such as magnitude, focal depth, distance of fault, and topography.

Types of hazards related to earthquakes include the ground shaking, seismic structural safety, liquefaction, settlement, and faults.

Areas of Contra Costa County most susceptible to earthquake include those near active fault zones.

There are numerous known faults in Contra Costa County, the most significant are the Hayward, Calaveras North, Concord-Green Valley, Mount Diablo, and Greenville faults, (Contra Costa County, 2018). The Hayward and Rodgers Creek Faults have high potential for experiencing major to great seismic events. There is a 72 percent likelihood that at least one earthquake with a magnitude of

6.7 or greater will occur in the San Francisco Bay area before 2043 causing widespread damage.

The United States Geological Survey ground motion maps indicate the peak ground acceleration, that has a 10 percent probability of being exceeded in a 50-year period, is 0.4g. The entire County planning area is at risk to direct and indirect impacts from earthquakes according to the HMP. In the City, a total of 52 critical facilities were identified to be exposed to the earthquake hazard per the HMP.

Based on the 2024 Local Hazard Mitigation Plan (Contra Costa County, 2024) there are no known active faults located within the City boundaries, however, there are numerous faults located in the regional vicinity. These faults include the Davis Fault and the Greenville-Marsh Creek Fault. The Greenville-Marsh Creek Fault is located about eight miles south/southwest of Brentwood. This fault produced a moderate magnitude earthquake in 1980 and has a recurrence interval estimated to be 550 years. There are also several structures in the downtown area that are seismically unreinforced and prone to collapse. Along with structures downtown, many residents live in older homes that are not built to current seismic building codes. In the event of an earthquake, the City’s vulnerable residents would be competing to secure funding and other resources. The annualized frequency of an earthquake is 0.010% chance per year.

The City’s RRA identifies specific assets and risks associated with seismic activity. Earthquake is estimated to be the City’s costliest threat per the RRA. The cost is not as significant on an asset basis, but when added together, earthquakes have the potential to impact several assets simultaneously. It was determined that many of the City’s facilities are at risk to earthquake threat including:
• COBWTP
• All pump stations
• Randall Bold Intertie

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7.7 Communication Protocols
“[Describe] communication protocols and procedures to inform customers, the public, interested parties, and local, regional, and state governments, regarding, at a minimum, all of the following:
[…]” (CWC §§ 10632(a)(5)).

Timely and effective communication is a key element of WSCP implementation. The City’s communication protocols and procedures in the event of a water shortage are structured to be activated through authorization by the City Council. Under a water shortage condition, the actual water supply and demand information and conditions would be assessed to determine whether activating the WSCP is warranted. If so, the Director of Public Works would recommend activation of the appropriate stage alert, and request City Council authorization to initiate the measures necessary to achieve the appropriate demand reduction target. The public would be encouraged to understand and be involved in the decision-making process and provide feedback to the City Council on such an action. The WSCP is flexible and can be implemented to best match actual conditions of a particular water shortage event.

Specific communication protocols to inform customers, the public, interested parties, and local, regional, state governments of any current or projected shortage as determined by the Annual Assessment described in Section 7.2 and any shortage response actions as a result of the Annual Assessment are listed below:
• Expanded public information and awareness program by implementing workshops, distributing park signs, adding bill inserts, and increasing the number of educational programs at schools.

Use of social media and e-mail blasts to customers.
• A multi-year water use history is maintained in the billing software database. The City provides internet bill access capability to customers so they can easily access the past 12 months of their water use. Additional data can be requested. This is particularly useful during a water shortage condition for both the City and its customers.

7.8 Compliance and Enforcement
“[Describe]…customer compliance, enforcement, appeal, and exemption procedures for triggered shortage response actions as determined pursuant to Section 10632.2” (CWC §§ 10632(a)(6)).

Section 10632(a)(6) of the CWC requires a water supplier to describe how it will ensure compliance with and enforce provisions of the WSCP. The City, after one written warning, may install a flowrestricting device on the service line of any customer observed by City personnel to be using water for any non-essential or unauthorized use defined in a City ordinance.

An excess use penalty per 1,000 gallons of water (sometimes referred to as one unit) used above the applicable allocation during each billing period may be charged by the City for all service rendered on and after the effective date of an ordinance. Repeated violations of unauthorized water use can result in discontinuance of water service. Table 7-7 lists penalties and charges and the stage during which they take effect.

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Table 7-7. Penalties and Charges
Penalties or charges Shortage Level when penalty takes effect Penalties for not reducing consumption Level 3
Charges for excess use Level 3
Flat fine Varies
Charge per unit over allotment Level 3
Flow restriction Level 3
Termination of service Level 3

7.9 Legal Authorities
“(A) A description of the legal authorities that empower the urban water supplier to implement and enforce its shortage response actions specified in paragraph (4) that may include, but are not limited to, statutory authorities, ordinances, resolutions, and contract provisions. […] (C) A statement that an urban water supplier shall coordinate with any city or county within which it provides water supply services for the possible proclamation of a local emergency, as defined in Section 8558 of the Government Code” (CWC §§ 10632(a)(7)).

The relevant statutory authorities, local ordinances and resolutions and water supply contract provisions to which the City is subject are listed below:
• The City’s WSCP was adopted in June of 2016 as part of the City’s 2015 UWMP and is updated every five years as part of the UWMP. The City Council may, by resolution and after a noticed public hearing, determine that water shortage conditions exist within the City. Based on this determination, the City Council may determine that water shortage measures become operative within the City and remain in effect until the City Council, by resolution, determines that the water shortage condition no longer exists.

The City shall declare a water shortage emergency condition in accordance with Water Code Chapter 3 (commencing with Section 350) of Division 1 as stated below:

Declaration of water shortage emergency condition. The governing body of a distributor of a public water supply, whether publicly or privately owned and including a mutual water company, shall declare a water shortage emergency condition to prevail within the area served by such distributor whenever it finds and determines that the ordinary demands and requirements of water consumers cannot be satisfied without depleting the water supply of the distributor to the extent that there would be insufficient water for human consumption, sanitation, and fire protection.

The City shall coordinate with any city or county within which it provides water supply services for the possible proclamation of a local emergency under California Government Code, California Emergency Services Act (Article 2, Section 8558). Below is a list of contacts for all cities or counties for which the City provides services in this WSCP, along with developed coordination protocols that can facilitate compliance with the Water Code in the event of a local emergency as defined in subpart (c) of Government Code Section 8558:
• City of Brentwood, Department of Public Works – Water Operations, (925) 516-6000 • City of Brentwood, Office of Emergency Services, (925) 809-7737

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7.10 Financial Consequences of WSCP
“A description of the financial consequences of, and responses for, drought conditions, including, but not limited to, all of the following: […]” (CWC §§ 10632(a)(8)).

The financial consequence of implementing the WSCP include potential revenue reductions and expense increases. The City has developed mitigation actions to reduce these impacts and the cost of compliance.

7.10.1 Potential Revenue Reductions and Expense Increases The City understands the projected ranges of water sales by shortage stage and what the impact would be on projected revenues and expenditures by each shortage stage. Revenues would decrease as consumption is decreased. Expenditures would increase as response actions are implemented. Surcharges would have to be adopted to avoid severe financial hardship during a water shortage condition.

7.10.2 Mitigation Actions
In Shortage Level 1 and 2 conditions, the City would attempt to avoid rate adjustments. However, if the water shortage conditions persisted and/or became more severe thereby further reducing demands, rate changes would be imperative.
• Memorandum Accounts - The City will establish memorandum accounts to track expenses and revenue shortfalls caused by both mandatory rationing and voluntary conservation efforts. The City may implement a surcharge to recover revenue shortfalls recorded in their drought memorandum accounts.
• Drought Rate Structures and Surcharges – City may implement a drought surcharge so the City can receive sufficient revenues to cover the cost of providing water service when consumption decreases due to drought conditions. The water shortage surcharge only applies to the metered water charge.
• Use of Financial Reserves - The City has financial reserves to address decreased water sales during a water shortage.
• Other Measures - The City does not have additional measures formalized such as postponement of capital improvements.

7.10.3 Cost of Compliance
The cost of compliance with the City’s drought rate structure and surcharges and compliance to address excessive residential water use includes City efforts such as additional staff focused on high consumption monitoring, additional water waste patrols as required as part of the City’s WSCP, and additional expenditures and fees for providing water rebates to customers that exceed water use reductions. The City’s Director of Public Works or designee will evaluate revenues and reserves monthly during a prolonged water shortage event.

7.11 Monitoring and Reporting
“[Describe] monitoring and reporting requirements and procedures that ensure appropriate data is collected, tracked, and analyzed for purposes of monitoring customer compliance and to meet state reporting requirements” (CWC §§ 10632(a)(9)).

Water production data is recorded daily. It is monitored by the Public Works Director or designee during normal and shortage water supply conditions. Totals are reported monthly and are incorporated into water supply reports. The City maintains extensive water use records on individual

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7.12 WSCP Refinement, Adoption, Submittal, and Availability “[Describe] reevaluation and improvement procedures for systematically monitoring and evaluating the functionality of the water shortage contingency plan in order to ensure shortage risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented as needed” (CWC §§ 10632(a)(10)).

The WSCP is routinely evaluated to improve functionality to ensure the shortage risk tolerance is adequate and the appropriate water shortage mitigation strategies can be implemented as needed.

The updated WSCP is adopted, submitted, and available per the Water Code requirements.

7.12.1 Refinement Procedures
The WSCP may be updated independently of the UWMP. The City reviewed the prior WSCP following the latest drought and incorporated permanent restrictions on water use required by the SWCRB.

Additional modifications to the WSCP were considered based upon lessons learned from the recent drought. This review and update process shall be continued at a minimum of every five years in parallel with the UWMP update.

7.12.2 Adoption, Submittal, and Availability
“The urban water supplier shall make available the water shortage contingency plan prepared pursuant to this article to its customers and any city or county within which it provides water supplies no later than 30 days after adoption of the water shortage contingency plan” (CWC §§ 10632 (c)).

The WSCP is typically reviewed and adopted as part of the UWMP review and adoption process. The WSCP may also be periodically amended independently of the UWMP, as needed. In either instance the public review period and adoption process following Government Code Section 6066 are followed.

The updated WSCP is made available to the City and the appropriate cities and counties no later than 30 days after it is adopted. The WSCP is available at the City’s website and as part of the UWMP document, also located on the City’s website and the California State Library.

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Section 8
Demand Management Measures
“The narrative pursuant to this paragraph shall include descriptions of the following water demand management measures:
(i) Water waste prevention ordinances.
(ii) Metering.
(iii) Conservation pricing.
(iv) Public education and outreach.
(v) Programs to assess and manage distribution system real loss. (vi) Water conservation program coordination and staffing support. (vii) Other demand management measures that have a significant impact on water use as measured in gallons per capita per day including innovative measures, if implemented” (CWC §§ 10631(e)(1)(B)).

The City conducts an ongoing water conservation program and has committed to implementing water conservation measures for all customer sectors. The City is a member of the CalWEP (formerly the California Urban Water Conservation Council). This section provides narrative descriptions addressing the nature and extent of each DMM implemented over the past five years, from 2021 through 2025.

8.1 Conservation Program Implementation
“For an urban retail water supplier, as defined in Section 10608.12, a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years. The narrative shall describe the water demand management measures that the supplier plans to implement to achieve its water use targets pursuant to Section 10608.20” (CWC §§ 10631(e)(1)(A)).

Over the past five years, the City has been implementing DMMs such as rebates for water use reduction during drought, free water use evaluations, a free recycled water fill station, distribution of water conserving appliances and tools, and a conversion to automatic meter reading system to continuously monitor leaks. A summary of water conservation measures and the nature and extent of their implementation over the past five years is shown in Table 8-1.

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Table 8-1. Extent and Nature of DMM Implementation over the Past Five Years DMM 2021 2022 2023 2024 2025
Water Waste Prevention
Ordinance Yes Yes Yes Yes Yes
Metering Fully metered Fully metered Fully metered Fully metered Fully metered Conservation Pricing Volumetric based,
uniform rate structure
Volumetric based,
uniform rate
structure
Volumetric based,
uniform rate
structure
Volumetric based,
uniform rate
structure
Volumetric based,
uniform rate
structure
Public Education and Outreach
Elementary School
Assemblies 14 9 11 9 7
Residential consumption
checks (checks for
continuous use at the
meter)
148 132 140 150 135
Water waste notifications 11 15 12 12 12
Water use courtesy
notices sent 260 260 260 260 260
Utility bill inserts Yes Yes Yes Yes Yes
Water conservation items
in monthly City letters Yes Yes Yes Yes Yes
Assess and Manage Distribution System Real Loss
Water Conservation
Coordinator Yes Yes Yes Yes Yes
Annual Water Loss Audit Yes Yes Yes Yes Yes
Miles of distribution
system segments tested
for leaks
Reactive only Reactive only Reactive only Reactive only Reactive only Number of leaks repaired 48 31 27 40 27

8.1.1 Water Waste Prevention Ordinances
The City conducts an ongoing water conservation program and has a water waste prevention ordinance in place at all times. The ordinance is Section 14.01.510 of the City’s Municipal code, “Conservation – Water waste prohibited.” (Appendix F)
Additionally, the City adopted the State’s Model Water-Efficient Landscape Ordinance on January 1, 2010 (see Appendix I). This ordinance requires a landscape permit, plan check, or design review for new and rehabilitated landscaped areas of 2,500 square feet or greater. The City rewrote Municipal Code 17.630 (Landscaping and Screening ordinance adopted in 1992). The City Council adopted the rewrite on June 14, 2011.

The implementation of this DMM is ongoing. The City will continue to enforce water conservation and water waste prevention. To comply with the Model Water-Efficient Landscape Ordinance, the City will review landscape permit applications and grant permits.

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8.1.2 Metering
The City is fully metered. All water delivered through a service connection must be metered and billed. Tampering with meters or the use of any device to allow delivery of unmetered water is prohibited.

The City has recently upgraded the system to an advanced metering infrastructure fixed-base system. The new meter technology will allow meter data to be recorded on an hourly basis. This change will reduce water loss within the City because it will notify the staff of leaks, high consumption, and water theft when they occur and improve the effectiveness of the High-Usage Notification Program (See Section 8.1.3).

8.1.3 Conservation Pricing
The implementation of this DMM is ongoing. The City implements tiered rates for residential and commercial customers. In 2023, the City prepared a five-year water rate study and adopted the proposed water rates. The City’s current water rate table is included in Appendix J in this document.

The City currently implements conservation pricing for all its customers.

The City has a High-Usage Notification Program. The City’s current program notifies customers with higher than expected water use using the Abnormal Report which is generated each read cycle (4 times a month). Emails are sent to customers notifying them of the higher than expected water use and offering a free water use evaluation. New meter technology will help the City notify residents sooner about continuous flow events.

8.1.4 Public Education and Outreach
Public information is an ongoing component of the City’s water conservation program. The City currently produces bill inserts and news articles in the City’s quarterly newsletter. The City website also includes conservation information as described below. Some of the public education and outreach efforts that are ongoing are discussed below.

Water Survey Programs for Single-Family and Multi-Family Residential Connections The City conducts residential water use surveys as a free service to assist residents of single-family and multi-family units with identifying possible areas of water waste inside and outside their homes and educate them about water conservation techniques. Residential water use surveys consist of annual water audits, water use reviews, and surveys of past program participants. Auditors will identify water use problems, recommend repairs, and offer instruction regarding landscape principles, irrigation timer use, and, when appropriate, meter reading. The implementation of this program is ongoing. The City staff reviews online request forms submitted by residents and schedules a survey. Then the City conducts the survey. Results are entered into a database and provided to customers via mail.

School Education Programs
School education is an ongoing component of the City’s water conservation program. The program targets all grades, and includes offering Project WET (Water Education for Teachers) workshops for teachers, performing classroom demonstrations, displaying booths at science fairs, and providing assemblies. The City also promotes student participation, such as providing bus transportation for grade-schoolers to the annual public works open house.

City Water Conservation Website
The City’s website contains an entire section dedicated to water conservation. In this section of the website customers can access available rebates, conservation news, conservation tips, water fill

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Social media and email blasts are conducted on a regular basis to provide relevant and real time water use efficiency information to City customers.

City Open House
The City conducts an annual Public Works open house. All third grade students, families, and educators are invited to the city corporation yard to participate in stations (16 different stations in 2025) about various City public works programs and infrastructure including the water quality lab, solid waste, how garbage is disposed, how the sewer system works, water conservation and water use efficiency, and how water meters work. Attendees watch a show on conservation and are able to see water and wastewater system equipment and activities up close such as of piping tapping and fire hydrant assembly demonstrations. Tables set up for a model display of how stormwater is collected and conveyed. The annual event is a great opportunity for children and City customers to understand how the City public works systems operates and how they can impact those systems and resources.

8.1.5 Programs to Assess and Manage Distribution System Real Loss The City has complied with SB 555 and has submitted an annual water loss audit each of the required years (2020-2024). The City’s water audits annually. The City’s programs to assess and manage the system’s real losses consists of ongoing leak detection and repair within the system.

This program includes a meter testing and replacement program. The City’s SCADA system also provides low pressure alerts in various pressure zones of the water system to identify potential water loss conditions as they arise. The City’s SCADA alarms also monitor for storage tank overflows so that operational water losses are minimized at all times. The implementation of this DMM is ongoing.

8.1.6 Water Conservation Program Coordination and Staffing Support The City employs a full time water efficiency specialist as an ongoing component of the City’s water conservation program. The water efficiency specialist is responsible for implementing and monitoring the City’s water conservation activities. The City water efficiency specialist continually works with other staff and stakeholders to implement activities in the water conservation program.

The implementation of this DMM is ongoing.

8.1.7 Other Demand Management Measures
Along with the aforementioned program, the City also may offer incentives to upgrade water using fixtures; as well as landscape rebates. These programs are available to all customer types.

The City provides a free low-flow showerheads to residents who schedule a residential water use survey. The City also can provide faucet aerators and toilet leak-detection tablets to customers.

Since more than 75 percent of construction in the City occurred after 1992, most plumbing fixtures are already ultra low-flow units. The implementation of this program is ongoing.

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Section 9
Plan Adoption, Submittal, and
Implementation
“Every urban water supplier required to prepare a plan pursuant to this part shall, at least 60 days prior to the public hearing on the plan required by Section 10642, notify any city or county within which the supplier provides water supplies that urban water supplier will be reviewing the plan and considering amendments or changes to the plan. The urban water supplier may consult with, and obtain comments from, any city or county that receives notice pursuant to this subdivision. […] The urban water supplier shall provide that portion of its urban water management plan prepared pursuant to this article to any city or county within which is provides water supplies no later than 60 days after the submission of its urban water management plan. […] Prior to adopting a plan, the urban water supplier shall make the plan available for public inspection and shall hold a public hearing thereon. Prior to the hearing, notice of the time and place of the hearing shall be published within the jurisdiction of the publicly owned water supplier pursuant to Section 6066 of the Government Code. The urban water supplier shall provide notice of the time and place of hearing to any city or county within which the supplier provides water supplies.

A privately owned water supplier shall provide an equivalent notice within its own service area” (CWC §§ 10621(b)–10635(b)–10642).

This section describes actions taken by the City to address CWC requirements for a public hearing, UWMP adoption, submittal of an adopted UWMP, UWMP implementation, and the process for amending an adopted UWMP.

9.1 Inclusion of all 2025 Data
This UWMP includes the water use and planning data for the entire year of 2025, reporting on a calendar year basis.

9.2 Notice of Public Hearing
“Every urban water supplier required to prepare a plan pursuant to this part shall, at least 60 days prior to the public hearing on the plan required by Section 10642, notify any city or county within which the supplier provides water supplies that urban water supplier will be reviewing the plan and considering amendments or changes to the plan. The urban water supplier may consult with, and obtain comments from, any city or county that receives notice pursuant to this subdivision. […] The urban water supplier shall provide that portion of its urban water management plan prepared pursuant to this article to any city or county within which it provides water supplies no later than 60 days after the submission of its urban water management plan. […] Prior to adopting a plan, the urban water supplier shall make the plan available for public inspection and shall hold a public hearing thereon. Prior to the hearing, notice of the time and place of the hearing shall be published within the jurisdiction of the publicly owned water supplier pursuant to Section 6066 of the Government Code. The urban water supplier shall provide notice of the time and place of hearing to any city or county within which the supplier provides water supplies.

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A privately owned water supplier shall provide an equivalent notice within its own service area” (CWC §§ 10621(b)–10635(b)–10642).

The Act requires the encouragement of public participation and a public hearing as part of the UWMP development and approval process. As required by the Act, the City is making the UWMP available for public inspection and held a public hearing prior to adopting this UWMP. The City is required to provide 60-day notification to cities and counties to which they serve water that the UWMP is being updated and reviewed. Notifications to cities and counties are reported in Table 2-6 and included in Appendix B
Table 9-1. Notification to Cities and Counties, Water Code Section 10621(b) and 10642 (DWR Table 10-1)
City name 60 day notice Notice of public hearing
-- -- --
County name 60 day notice Notice of public hearing
Contra Costa County X X

9.3 Public Hearing and Adoption
As mentioned in Section 2, per the requirements of Government Code Section 6066, a Notice of Public Hearing was published twice in the local newspaper 14 days prior to the hearing to notify all customers and local governments of the public hearing, and copies of the draft UWMP were made available for public inspection at the City’s administration building and on-line. A copy of the published Notice of Public Hearing is included in Appendix K.

This UWMP was adopted by the Brentwood City Council on May 26, 2026. A copy of the adoption resolution is provided in Appendix L. The adopted UWMP was provided to DWR, the State library, and the appropriate cities and counties within 30 days of adoption. The adopted UWMP is available for public review during normal business hours at the City offices and online at http://www.brentwoodca.gov/gov/pw/water/reports.asp.

9.4 Plan Submittal and Public Availability
The adopted UWMP was provided to DWR, the State library, and the appropriate cities and counties within 30 days of adoption. The UWMP was submitted electronically to DWR using the WUE data, online submittal tool before July 1, 2026.

Appendix L includes a notice of public availability submitted to DWR. The adopted UWMP will be available for public review during normal business hours at the City offices and online at:
http://www.brentwoodca.gov/gov/pw/water/reports.asp.

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9.5 Plan Implementation
“An urban water supplier shall implement its plan adopted pursuant to this chapter in accordance with the schedule set forth in its plan” (CWC §§ 10643).

This 2025 UWMP updates the water conservation and water shortage contingency planning implementation plan and projected schedules in the City’s 2020 UWMP. The UWMP describes the availability of water and discusses water use, reclamation, and water conservation activities. The UWMP concludes that the water supplies available to the City’s treated water customers are adequate over the next 25-year planning period through 2050.

The City will also track actual recycled water use and compare it to the projected use in this UWMP.

The City implemented the 2020 UWMP in accordance with the information that was projected in that document.

9.6 Amending an Adopted UWMP
Any future amendments or changes to this UWMP will be submitted to all the appropriate agencies as specified in CWC §§ 10621(a) and (c)(1). If revised, a copy of the WSCP will be submitted to DWR within 30 days of adoption.

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Section 10
References
Ackerly, David, Andrew Jones, Mark Stacey, Bruce Riordan. (University of California, Berkeley). 2018. San Francisco Bay Area Summary Report. California’s Fourth Climate Change Assessment. Publication number: CCCA4-SUM2018-005.

Adapting to Rising Tides (ART), San Francisco Bay Conservation and Development Commission (BCDC), 2020.

Adapting to Rising Tides: East Contra Costa County Vulnerability Assessment & Adaptation Project, April 2020.

Bedsworth, Louise, Dan Cayan, Guido Franco, Leah Fisher, Sonya Ziaja. (California Governor’s Office of Planning and Research, Scripps Institution of Oceanography, California Energy Commission, California Public Utilities Commission). Statewide Summary Report. California’s Fourth Climate Change Assessment. 2018.

Brown and Caldwell. 2020 Urban Water Management Plan, June 2021.

California Department of Finance. E-1 Cities, Counties, and the State Population and Housing Estimates with Annual Percent Change — January 1, 2024 and 2025. March 2026. Accessed at:
https://dof.ca.gov/media/docs/forecasting/Demographics/estimates-e1/E-1_2025_InternetVersion.xlsx California Department of Water Resources (DWR), 2006. California’s Groundwater, Bulletin 118. The San Joaquin Valley Groundwater Basin, Tracy Subbasin. Prepared by California Department of Water Resources, January 20, 2006. Accessed at: http://www.water.ca.gov/pubs/groundwater/bulletin_118/basindescriptions/5-22.15.pdf California Department of Water Resources (DWR), 2016a. California’s Groundwater, Bulletin 118, Interim Update 2016. Prepared by California Department of Water Resources, December 2016. Accessed at:
https://cawaterlibrary.net/wp-content/uploads/2017/05/Bulletin_118_Interim_Update_2016.pdf California Department of Water Resources (DWR). Climate Change Technical Advisory Group (CCTAG): Perspectives and guidance on incorporating climate change into water planning. 2019.

California Department of Water Resources (DWR). Web Site: California Irrigation Management Information System.

October 2025. Accessed at: https://cimis.water.ca.gov/Default.aspx California Regional Water Quality Control Board (RWQCB). Waste Discharge Requirements/ National Pollutant Discharge Elimination System Permit CA0082660, Order R5-2024-0020. Adopted on 19 April, 2024.

California Ocean Protection Council. California Sea Level Rise Guidance: 2024 Science and Policy Update. California Sea Level Rise Science Task Force, California Ocean Science Trust. 2024.

City of Brentwood. Existing Conditions Report, City of Brentwood General Plan Update. April 9, 2013a.

City of Brentwood. Recycled Water Feasibility Study for the City of Brentwood, October 2013. Prepared by RobertsonBryan, Inc. 2013b.

City of Brentwood. Brentwood/CCWD Memorandum of Understanding Regarding Potential Service from CCWD’s Los Vaqueros Facilities. April 30, 2020.

City of Brentwood. Climate Vulnerability Assessment. Prepared as Attachment 1B to support the City of Brentwood and Contra Costa County 2024 Hazard Mitigation Plan. 2024a.

City of Brentwood. City of Brentwood, Our Demographics page. Accessed December 2025 at:
https://properties.zoomprospector.com/california/community/Brentwood-California/0608142/demographics (2025a)
City of Brentwood. City of Brentwood, About webpage. Accessed October 2025 at:
https://www.brentwoodca.gov/government/about (2025b)
Contra Costa County. Contra Costa County Climate Action and Adaptation Plan. November 2024.