City Council Agenda
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Memo to: |
Manteca City Council |
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From: |
Jose Jasso - Assistant City Manager / Interim Director of Public Works |
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Prepared by: |
George Montross - Deputy Director of Public Works / Water Resources |
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Date: |
February 17, 2026 |
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Subject: |
Hold a Public Hearing and Approve the 2025 Public Health Goals Report On Drinking Water Quality |
Recommendation:
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Conduct a public hearing and adopt a resolution approving the 2025 Public Health Goals Report.
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Background:
The California Health and Safety Code, Section 116470, requires public water systems serving more than 10,000 water service connections, to prepare a Public Health Goals Report and conduct a public hearing to provide information to consumers on levels of constituents in the City’s drinking water. The City of Manteca operates a public water system and serves over 30,000 water connections, so a Public Health Goals Report must be completed.
The 2025 Public Health Goals Report covers the 2022-2025 reporting period. During this period, the City’s drinking water quality met all California Division of Drinking Water (DDW) and United States Environmental Protection Agency (USEPA) drinking water standards, except for 1,2,3 Trichloropropane (TCP). On January 1, 2026, the City of Manteca did come into compliance with 1,2,3 TCP’s Maximum Contaminate Level (MCL) and will no longer be mailing out quarterly public notices.
Public Health Goals (PHG) are health based recommendations and not enforceable standards. The City’s water system detected seven constituents above the PHG at various groundwater wells. The constituents are Arsenic, Chromium 6, 1,2,3 TCP, 1-2 Dibromo-3-chloropropane (DBCP), Tetrachloroethylene (PCE), Gross Alpha and Uranium. Please reference Attachment 2, Public Health Goals Report, for concentration levels of detected constituents.
Analysis:
Based on existing studies and current treatment technologies, elimination of the seven constituents would require highly advanced and expensive equipment. Additionally, the health benefits of installing treatment to mitigate PHGs would be uncertain, as some of the constituent levels are below existing laboratory technology limits. The City has installed treatment systems at various wells for several constituents, bringing them into compliance with DDW and USEPA standards.
Fiscal Impact:
There is no direct fiscal impact associated with adopting the Public Health Goals Report.
The addition of water treatment to mitigate various constituents below the Public Health Goals would result in a significant fiscal impact to Manteca’s water ratepayers. As analyzed in the report, the potential costs would be $18.3 million, not including ongoing operation and maintenance costs.
Documents Attached:
Attachment 1 - Resolution
Attachment 2 - Public Health Goals Report
Attachment 3 - PowerPoint