We read 16 results from Fillmore Water Dept’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 16,419 people · Water system ID CA5610002 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)average · range 3.18 to 12.6 · sampled 2023 · 2025 report, page 8 | 7.3 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Manganeseaverage · range ND to 0.45 · printed as 118 ppb · 2025 report, page 8 | 0.12 ppm | — | 0.05 ppm guideline | Above the guideline2.4x the guideline (taste, odor or stains; not a health limit) |
| Sulfateaverage · range 338 to 633 · 2025 report, page 8 | 437 ppm | — | 250 ppm guideline | Above the guideline1.7x the guideline (taste, odor or stains; not a health limit) |
| Total dissolved solidsaverage · range 780 to 1,590 · 2025 report, page 8 | 1,067 ppm | — | 500 ppm guideline | Above the guideline2.1x the guideline (taste, odor or stains; not a health limit) |
| Uraniumaverage · range 3.99 to 12.9 · printed as 5.67 pCi/L · sampled 2023 · 2025 report, page 8 | 8.45 ppb | 0.6 ppb | 30 ppb | Above the health goal14x the health goal |
| Chlorideaverage · range 39 to 59 · 2025 report, page 8 | 45 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.58 to 2.1 · 2025 report, page 8 | 1.38 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2024 · 2025 report, page 8 | 0.2 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)as reported · 2025 report, page 8 | 9 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.6 to 1 · 2025 report, page 8 | 0.8 ppm | 1 ppm | 2 ppm | Below the health goal |
| Ironas reported · printed as 80 ppb · 2025 report, page 8 | 0.08 ppm | — | 0.3 ppm guideline | Within the guideline |
| Lead90th percentile of 30 homes tested, 0 over the action level · sampled 2024 · 2025 report, page 8 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range ND to 6.4 · 2025 report, page 8 | 2.5 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHaverage · range 7.2 to 8.1 · 2025 report, page 8 | 7.7 | — | — | Normal range |
| Seleniumaverage · range ND to 26 · sampled 2023 · 2025 report, page 8 | 10 ppb | 30 ppb | 50 ppb | Below the health goal |
| Conductivityaverage · range 1,160 to 2,070 · 2025 report, page 8 | 1,470 µS/cm | 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Fillmore Water Dept’s water between Mar 2024 and Sep 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium70 ppbFound in 4 of 4 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
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.
Radium and uranium
Found: Gross alpha (radioactivity), Uranium
What removes it: Reverse osmosis.
Sediment or cloudy water
Found: Manganese
What removes it: Oxidation filter.
Salty taste / high TDS
Found: Sulfate, Total dissolved solids
What removes it: Reverse osmosis.
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