We read 13 results from South Coast Water District’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 41,118 people · Water system ID CA3010042 · 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 2.8 · listed as a violation in the report · Groundwater Recovery Facility · 2025 report, page 7 | Not detected | 0.004 ppb | 10 ppb | Not detected |
| Chlorideaverage · range 93 to 116 · listed as a violation in the report · Groundwater Recovery Facility · 2025 report, page 7 | 108 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range ND to 2.6 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 1.6 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 6 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range 3.5 to 25 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 24 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 25 to 56 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 52 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · listed as a violation in the report · Groundwater Recovery Facility · 2025 report, page 7 | 0.24 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 6 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · listed as a violation in the report · Groundwater Recovery Facility · 2025 report, page 7 | 0.95 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfateaverage · range 119 to 170 · listed as a violation in the report · Groundwater Recovery Facility · 2025 report, page 7 | 159 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 478 to 508 · listed as a violation in the report · Groundwater Recovery Facility · 2025 report, page 7 | 496 ppm | — | 500 ppm guideline | Within the guideline |
| Hardnessaverage · range 11.7 to 12.5 · Groundwater Recovery Facility · 2025 report, page 7 | 12.1 gpg (207 ppm) | — | — | Very hard |
| Sodiumaverage · Groundwater Recovery Facility · 2025 report, page 7 | 62 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in South Coast Water District’s water between Feb 2023 and Nov 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium48 ppbFound in 6 of 8 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 in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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