We read 14 results from City of Lodi’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 68,272 people · Water system ID CA3910004 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Arsenicaverage · range ND to 8.1 · listed as a violation in the report · Wells · 2025 report, page 4 | 3.8 ppb | 0.004 ppb | 10 ppb | Above the health goal950x the health goal |
| Lead90th percentile of 34 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 4 | 0.3 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal1.5x the health goal |
| 1,1-Dichloroethyleneaverage · range ND to 1.9 · Wells · 2025 report, page 4 | Not detected | 7 ppb | 7 ppb | Not detected |
| Bariumaverage · range ND to 0.28 · listed as a violation in the report · Wells · 2025 report, page 4 | 0.1 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 0.4 to 1.2 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 0.74 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)average · range ND to 5 · listed as a violation in the report · Wells · 2025 report, page 4 | 0.74 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of 34 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 4 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range ND to 24.5 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 10 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range ND to 39 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 13.2 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range ND to 0.1 · listed as a violation in the report · Wells · 2025 report, page 4 | 0.03 ppm | 1 ppm | 2 ppm | Below the health goal |
| Nitrate (as N)average · range ND to 9.2 · listed as a violation in the report · Wells · 2025 report, page 4 | 3.7 ppm | 10 ppm | 10 ppm | Below the health goal |
| Perchlorateaverage · range ND to 1.4 · listed as a violation in the report · Wells · 2025 report, page 4 | 0.2 ppb | 1 ppb | 6 ppb | Below the health goal |
| Tetrachloroethylene (PCE)average · range ND to 4.9 · Wells · 2025 report, page 4 | Not detected | 0.06 ppb | 5 ppb | Not detected |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · Surface water plant · 2025 report, page 5 | 0.02 NTU | None set | 1 NTU | Below the legal limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in City of Lodi’s water between Nov 2023 and Jul 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA6.2 pptFound in 2 of 50 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS5.6 pptFound in 2 of 50 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS6.1 pptFound in 4 of 50 samples · highest resultNo federal limit in force for this one
- PFBS17 pptFound in 5 of 50 samples · highest resultNo federal limit in force for this one
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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