We read 16 results from Edwardsville’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 26,808 people · Water system ID IL1190250 · 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 |
|---|---|---|---|---|
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 6 | 1.9 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal9.5x the health goal |
| PFOA (a PFAS)as reported · Wells · 2025 report, page 8 | 0.8 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal114x the health goal |
| Radium (combined 226 + 228)as reported · listed as a violation in the report · Wells · 2025 report, page 6 | 0.68 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumas reported · listed as a violation in the report · sampled 2024 · Wells · 2025 report, page 6 | 0.06 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineas reported · range 1.2 to 1.4 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 1.3 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)as reported · range 6 to 7.09 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 7 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · range 18 to 20.6 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 21 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · listed as a violation in the report · sampled 2024 · Wells · 2025 report, page 6 | 0.66 ppm | 1 ppm | 4 ppm | Below the health goal |
| Ironas reported · listed as a violation in the report · Wells · 2025 report, page 7 | 0.04 ppm | — | 0.3 ppm guideline | Within the guideline |
| Manganeseas reported · listed as a violation in the report · printed as 8.2 ppb · Wells · 2025 report, page 7 | 0.0082 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)as reported · listed as a violation in the report · Wells · 2025 report, page 6 | 1 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)as reported · Wells · 2025 report, page 8 | 1.1 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFOS (a PFAS)as reported · Wells · 2025 report, page 8 | 0.5 ppt | 1 ppt | 4 ppt from 2029 | Below the health goal |
| PFBS (a PFAS)as reported · Wells · 2025 report, page 8 | 3.6 ppt | None set | None | No health limit |
| PFHpA (a PFAS)as reported · Wells · 2025 report, page 8 | 0.6 ppt | None set | None | No health limit |
| PFHxA (a PFAS)as reported · Wells · 2025 report, page 8 | 2.3 ppt | 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 Edwardsville’s water between Nov 2023 and May 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFBS3.5 pptFound in 2 of 2 samples · highest resultNo federal limit in force for this one
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.
PFAS ("forever chemicals")
Found: PFOA (a PFAS)
What removes it: Reverse osmosis.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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