We read 16 results from Security Water District’s 2024 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 20,000 people · Water system ID CO0121775 · Read the district’s 2024 report (opens in a new tab)
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Results from the 2024 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 |
|---|---|---|---|---|
| Lead90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2024 report, page 6 | 2.5 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal13x the health goal |
| Radium (combined 226 + 228)average · range 2.06 to 2.06 · SWD wells · 2024 report, page 6 | 2.06 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Uraniumaverage · range 4.8 to 4.8 · sampled 2023 · SWD wells · 2024 report, page 6 | 4.8 ppb | 0.6 ppb | 30 ppb | Above the health goal8x the health goal |
| Bariumaverage · range 0.12 to 0.12 · sampled 2023 · SWD wells · 2024 report, page 5 | 0.12 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chromium (total)average · range 1.1 to 1.1 · sampled 2023 · SWD wells · 2024 report, page 5 | 1.1 ppb | None set | 100 ppb | Below the legal limit |
| Disinfection byproducts (HAA5)average · range ND to 31.5 · Distribution system · 2024 report, page 5 | 8.22 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 0.53 to 57 · Distribution system · 2024 report, page 5 | 19.3 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.72 to 0.72 · sampled 2023 · SWD wells, highest of 2 sources · 2024 report, page 5 | 0.72 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)average · range 5.2 to 6.8 · SWD wells · 2024 report, page 5 | 5.95 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumaverage · range 5.8 to 5.8 · Fountain Valley Authority supply, highest of 2 sources · 2024 report, page 5 | 5.8 ppb | 30 ppb | 50 ppb | Below the health goal |
| Calciumaverage · sampled 2023 · SWD wells · 2024 report, page 7 | 85 ppm | None set | None | No health limit |
| Lithiumaverage · range ND to 33.3 · SWD wells · 2024 report, page 7 | 14.2 ppb | None set | None | No health limit |
| Magnesiumaverage · sampled 2023 · SWD wells · 2024 report, page 7 | 15 ppm | None set | None | No health limit |
| PFBA (a PFAS)average · range ND to 28 · printed as 0.0057 ppb · SWD wells · 2024 report, page 7 | 5.7 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range ND to 29.7 · printed as 0.0060 ppb · SWD wells · 2024 report, page 7 | 6 ppt | None set | None | No health limit |
| Sodiumaverage · sampled 2023 · SWD wells · 2024 report, page 7 | 42 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Security Water District’s water between Jul 2024 and Apr 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium33.3 ppbFound in 8 of 10 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
Radium and uranium
Found: Radium (combined 226 + 228), Uranium
What removes it: Reverse osmosis.
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