We read 14 results from Town of Windsor’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 25,561 people · Water system ID CA4910017 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
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 |
|---|---|---|---|---|
| Chromium-6average · range 0.32 to 0.48 · listed as a violation in the report · Wells · 2025 report, page 16 | 0.39 ppb | 0.02 ppb | 10 ppb | Above the health goal20x the health goal |
| Bariumaverage · range ND to 0.13 · listed as a violation in the report · Wells · 2025 report, page 16 | Not detected | 2 ppm | 2 ppm | Not detected |
| Chlorideaverage · range 4.3 to 9.3 · listed as a violation in the report · Wells · 2025 report, page 17 | 5.6 ppm | — | 250 ppm guideline | Within the guideline |
| Disinfection byproducts (HAA5)average · range 1.7 to 5.6 · listed as a violation in the report · Distribution system · 2025 report, page 16 | 3.7 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 6.1 to 22.9 · listed as a violation in the report · Distribution system · 2025 report, page 16 | 14 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of 33 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 16 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range ND to 0.76 · listed as a violation in the report · Wells · 2025 report, page 16 | Not detected | 10 ppm | 10 ppm | Not detected |
| pHaverage · range 7.05 to 7.31 · Wells · 2025 report, page 17 | 7.18 | — | — | Normal range |
| Total dissolved solidsaverage · range 120 to 270 · listed as a violation in the report · Wells · 2025 report, page 17 | 164 ppm | — | 500 ppm guideline | Within the guideline |
| Turbidity (cloudiness)average · listed as a violation in the report · Wells · 2025 report, page 17 | 0.04 NTU | None set | 1 NTU | Below the legal limit |
| Alkalinityaverage · range 93 to 150 · Wells · 2025 report, page 17 | 124 ppm | None set | None | No health limit |
| Conductivityaverage · range 220 to 290 · listed as a violation in the report · Wells · 2025 report, page 17 | 240 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 6.2 to 9.01 · Wells · 2025 report, page 17 | 6.9 gpg (118 ppm) | — | — | Moderately hard |
| Sodiumaverage · range 8 to 12 · Wells · 2025 report, page 17 | 10 ppm | None set | None | No health 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.
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.
More districts: California water quality · All states · Something look wrong? Tell us