November 1, 2022 Item # 9
Item # 9.
RTC 22-1124:
2022 Report on Water
CITY OF Quality Relative to
Public Health Goals
1852
THE MISSION CIT
November 1, 2022
City of
Santa Clara
The Center of What's Possible
Public Health Goals Regulations
• The City is mandated by State Water Quality
Regulations to hold a public hearing to present
information on:
-The City's Water Quality
-Public Health Goals (PHGs)
-Findings
- Recommendations
2 POST MEETING MATERIAL
1 City of
Santa Clara
Santa Clara Water Quality
• Water & Sewer Utility staff collect over
3,000 water quality samples a year
• Santa Clara's water meets all water
quality standards required by State and
Federal regulations
• Every year, all residential and
commercial customers receive the City's
Consumer Confidence Report as part of
Inside Santa Clara
3 City of
Santa Clara
The Center of What's Possible
Background on PHGs
• The California Office of Environmental Health Hazard
Assessment has established 95 PHGs for chemical
contaminants in drinking water
• PHG or Maximum Contaminant Level Goal (MCLG)
exceedances require a report and public hearing
• This report covers calendar years 2019, 2020 and 2021.
PHGs are neither enforceable nor required to be met by
the Water Utility
4 City of
Santa Clara
The Center of What's Possible
Public Health Goals
• PHGs are set:
- at a level that "does not pose any significant risk to health" and which no known anticipated adverse effects on human health occur with added margin of safety
- intentionally at a level without considering technical feasibility or costs of achieving the goal
- in the case of carcinogens, at a theoretical level estimated to cause no more than one incidence of cancer risk in one
million people with a lifetime of exposure
5 City of
Santa Clara
The Center of What's Possible
Public Health Goals
Monitoring Results
Constituent MCL or (AL) PHG or (MCLG) Sampling Results
Arsenic (ppb) 10 0.004 ND - 1.7
MCL - Maximum contaminant level ND - Non-detectable
MCLG - Maximum contaminant level goal ppb - parts per billion AL - Action level
6 3
City of
Santa Clara
The Center of What's Possible
Report Conclusions
• The Water Utility will continue to regularly monitor
drinking water quality and is not proposing to change its current operations based on the information provided
-The City's drinking water meets all State and Federal
regulatory requirements for safe drinking water
- Benefits of reductions are uncertain, but the costs
associated with possible water treatment options are
significant 7
7 City of
Santa Clara
The Contero Whats Possiblo
Recommendation
• That Council accept the 2022 Report on the City's
Water Quality Relative to Public Health Goals at the
close of the Public Hearing
8 8
4 City of
Santa Clara
The Center of What's Possible
1852
THE MISSION CITY
9 9
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