We read 12 results from City of Biloxi’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 23,310 people · Water system ID MS0240001 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range 0.5 to 2.9 · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 2.9 ppb | 0.004 ppb | 10 ppb | Above the health goal725x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 1 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal5x the health goal |
| Bariumhighest measured · range 0.0024 to 0.0064 · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 0.0064 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 0.03 to 3.31 · Biloxi distribution · 2025 report, page 2 | 1.6 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range 1.5 to 1.7 · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 1.7 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.2 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Cyanidesingle sample · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 17.6 ppb | 150 ppb | 200 ppb | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 26.1 to 26.6 · Biloxi distribution · 2025 report, page 2 | 26.6 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 39 to 48.2 · Biloxi distribution · 2025 report, page 2 | 48.2 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.2 to 0.43 · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 0.43 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lithiumhighest measured · range 9.4 to 17.4 · sampled 2024 · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 17.4 ppb | None set | None | No health limit |
| Sodiumhighest measured · range 71.2 to 195 · sampled 2024 · Biloxi wells (PWS 0240001) · 2025 report, page 2 | 195 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 City of Biloxi’s water between Jun 2024 and Dec 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium17.4 ppbFound in 16 of 24 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.
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