We read 24 results from Coalinga-City’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 17,277 people · Water system ID CA1010004 · 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 |
|---|---|---|---|---|
| Chromium-6average · 2025 report, page 5 | 0.1 ppb | 0.02 ppb | 10 ppb | Above the health goal5x the health goal |
| Gross alpha (radioactivity)average · sampled 2024 · 2025 report, page 5 | 2.5 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Aluminumaverage · 2025 report, page 5 | 0.08 ppm | — | 0.2 ppm guideline | Within the guideline |
| Chloraminehighest running annual average · range 1.2 to 2.4 · 2025 report, page 5 | 1.8 ppm | None set | 4 ppm | Below the legal limit |
| Chlorideaverage · 2025 report, page 6 | 82 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest running annual average · range 1.2 to 2.7 · 2025 report, page 5 | 2.2 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 31 homes tested, 0 over the action level · 2025 report, page 5 | 0.25 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 11 to 17 · 2025 report, page 5 | 14.8 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 31 to 51 · 2025 report, page 5 | 43.8 ppb | None set | 80 ppb | Below the legal limit |
| Ironaverage · printed as 110 ug/L · 2025 report, page 6 | 0.11 ppm | — | 0.3 ppm guideline | Within the guideline |
| Lead90th percentile of 31 homes tested, 0 over the action level · 2025 report, page 5 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · 2025 report, page 5 | 0.6 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHaverage · range 6.9 to 7.9 · 2025 report, page 6 | 7.3 | — | — | Normal range |
| Sulfateaverage · 2025 report, page 6 | 30 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · 2025 report, page 6 | 240 ppm | — | 500 ppm guideline | Within the guideline |
| Zincaverage · range 0.25 to 0.37 · 2025 report, page 6 | 0.32 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityaverage · range 61 to 91 · 2025 report, page 6 | 75.9 ppm | None set | None | No health limit |
| Calciumaverage · 2025 report, page 6 | 19 ppm | None set | None | No health limit |
| Conductivityaverage · 2025 report, page 6 | 470 µS/cm | None set | None | No health limit |
| Hardnessaverage · 2025 report, page 6 | 5.56 gpg (95 ppm) | — | — | Moderately hard |
| Magnesiumaverage · 2025 report, page 6 | 12 ppm | None set | None | No health limit |
| Potassiumaverage · 2025 report, page 6 | 3.2 ppm | None set | None | No health limit |
| Sodiumaverage · 2025 report, page 6 | 52 ppm | None set | None | No health limit |
| Total organic carbonaverage · range 1.2 to 4.5 · 2025 report, page 5 | 2.4 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.
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)
What removes it: Reverse osmosis.
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