CITY OF POMONA
COUNCIL REPORT
June 15, 2026
To: Honorable Mayor and Members of the City Council
From: Anita D. Scott, City Manager
Submitted By: Chris Diggs, Water Resources Director
SUBJECT: APPROVAL OF AGREEMENT WITH LOS ANGELES GATEWAY REGION INTEGRATED REGIONAL WATER MANAGEMENT JOINT POWERS AUTHORITY (GWMA) RECOMMENDATION:
It is recommended that the City Council take the following action:
Approve the agreement with GWMA for continued cost sharing to maintain the monitoring stations and monitoring pursuant to the Harbor Toxic Pollutants Total Maximum Daily Load (TMDL); and Authorize the City Manager to execute the agreement (Attachment No. 1) on behalf of the City and any subsequent documents and amendments subject to approval as to form by the City Attorney.
EXECUTIVE SUMMARY:
The City has participated in this monitoring program since 2015. The new agreement will allow for the continuation of monitoring for an additional five years and allow the City to stay in compliance with the Harbor Toxic Pollutant TMDL per the stormwater permit.
SB1439/GOVERNMENT CODE §84308 APPLICABILITY:
☐ When this box is checked, it indicates the agenda item is subject to the Levine Act SB1439 requirements. Councilmembers are reminded to check their campaign contributions and determine whether they have received a campaign contribution of $500 or more that would require disclosure and/or recusal from discussing or acting on this agenda item. Campaign contributions of $500 or more made 1) by any person or entity who is identified in the agenda report as the applicant or proposer or 2) on behalf of the applicant or participant, including a parent, subsidiary or otherwise related business entity, or 3) by any person who has a financial interest in the agenda item requires a councilmember to comply with SB1439.
FISCAL IMPACT:
Funding for this action is budgeted in FY 2026-27 Safe Clean Water Program Fund Budget, account number FD 142, Measure W | CC8130, Environmental/Special Projects | Regulatory Compliance. The cost for GWMA is $139,953.10 for FY 2026-27, shared with 63 cities and Los Angeles County Flood Control District. The cost share portion for the term of the agreement for Pomona is as follows, and staff will budget accordingly for the following fiscal years based on the table below:
Fiscal Year
GWMA
Cost per Fiscal Year
Pomona Share for SGR GR1
Direct Admin Fee %
GWMA Direct Admin Fee
Indirect Admin Fee %
GWMA Indirect Admin Fee
Total Fee
2026-2027
$139,953.10
$2,520.96
10 $252.10
5 $126.05
$2,899.10
2027-2028
$145,552.82
$2,621.83
10 $262.18
5 $131.09
$3,015.10
2028-2029
$151,372.92
$2,726.66
10 $272.67
5 $136.33
$3,135.66
2029-2030
$157,430.11
$2,835.77
10 $283.58
5 $141.79
$3,261.14
2030-2031
$163,724.37
$2,949.15
10 $294.91
5 $147.46
$3,391.52
PREVIOUS RELATED ACTION:
On August 21, 2023, City Council approved the GWMA Agreement for three years. On June 1, 2015, City Council approved the GWMA agreement to participate in the Joint Dominguez Channel/Harbor Toxic TMDL Monitoring Program.
DISCUSSION:
The City is mandated to meet numerous requirements under the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System Permit (MS4 Permit). Collaborating with the neighboring cities and Los Angeles County allows the City to stay in compliance while sharing the cost of the monitoring and equipment.
The United States Environmental Protection Agency established the TMDL for Toxic Pollutants in March of 2012 to protect and improve the water quality in the Dominguez Channel and the Greater Los Angeles and Long Beach Harbor Waters. Since the City conveys stormwater to the San Gabriel River, it is part of the TMDL. The City began sharing these costs in 2015, and the current 2023 agreement is set to expire on June 30, 2026. With council approval, this action allows the City to stay in compliance with the Harbor Toxic TMDL for fiscal years 2026-2027 through 2030-2031.
Prepared by:
_____________________________
Julie Carver
Environmental Compliance Supervisor
ATTACHMENT: Attachment No. 1 – Agreement with GWMA
Agreement with GWMA for Harbor Toxics Compliance