We read 12 results from Quincy’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 45,000 people · Water system ID IL0010650 · 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 |
|---|---|---|---|---|
| Atrazinehighest measured · range ND to 0.36 · listed as a violation in the report · Treated water · 2025 report, page 5 | 0.36 ppb | 0.15 ppb | 3 ppb | Above the health goal2.4x the health goal |
| PFOA (a PFAS)highest measured · range ND to 2.9 · Treated water · 2025 report, page 7 | 2.9 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal414x the health goal |
| PFOS (a PFAS)highest measured · range ND to 2 · Treated water · 2025 report, page 7 | 2 ppt | 1 ppt | 4 ppt from 2029 | Above the health goal2x the health goal |
| Radium (combined 226 + 228)highest measured · range ND to 0.81 · listed as a violation in the report · sampled 2020 · Treated water · 2025 report, page 5 | 0.81 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumsingle sample · listed as a violation in the report · Treated water · 2025 report, page 6 | 0.0059 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloraminehighest measured · range 3 to 4 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 3.6 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)single sample · listed as a violation in the report · Treated water · 2025 report, page 6 | 2.6 ppb | None set | 100 ppb | Below the legal limit |
| Fluoridesingle sample · listed as a violation in the report · Treated water · 2025 report, page 6 | 0.64 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)single sample · listed as a violation in the report · Treated water · 2025 report, page 6 | 2.9 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFBA (a PFAS)average · range 8.8 to 13.5 · Treated water · 2025 report, page 7 | 11 ppt | None set | None | No health limit |
| PFBS (a PFAS)average · range ND to 5.7 · Treated water · 2025 report, page 7 | 1.4 ppt | None set | None | No health limit |
| Sodiumsingle sample · listed as a violation in the report · Treated water · 2025 report, page 6 | 24 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. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Quincy’s water between Dec 2024 and Aug 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFBS5.7 pptFound in 1 of 4 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.
Industrial chemicals and pesticides
Found: Atrazine
What removes it: Carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS)
What removes it: Reverse osmosis.
Radium and uranium
Found: Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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