We read 15 results from Palatine’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 70,875 people · Water system ID IL0312340 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range ND to 12.8 · listed as a violation in the report · Entry points · 2025 report, page 4 | 12.8 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Ironhighest measured · range 0.12 to 0.52 · listed as a violation in the report · sampled 2024 · Entry points · 2025 report, page 4 | 0.52 ppm | — | 0.3 ppm guideline | Above the guideline1.7x the guideline (taste, odor or stains; not a health limit) |
| PFOA (a PFAS)highest measured · range 3.4 to 4.5 · sampled 2024 · Water supply (state PFAS investigation) · 2025 report, page 6 | 4.5 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.1x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| PFOS (a PFAS)highest measured · range 3.4 to 4.5 · sampled 2024 · Water supply (state PFAS investigation) · 2025 report, page 6 | 4.5 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.1x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Total coliform bacteriahighest month · listed as a violation in the report · Distribution system · 2025 report, page 3 | 1.2 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.02 to 0.08 · listed as a violation in the report · sampled 2024 · Entry points · 2025 report, page 4 | 0.08 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 1 to 1.2 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 3 | 0.15 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 8.5 to 25.2 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 23 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 12.8 to 59 · listed as a violation in the report · Distribution system · 2025 report, page 3 | 52 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.66 to 1 · listed as a violation in the report · sampled 2024 · Entry points · 2025 report, page 4 | 1 ppm | 1 ppm | 4 ppm | Below the health goal |
| Manganesehighest measured · range 0.0091 to 0.03 · listed as a violation in the report · printed as 32 ppb · sampled 2024 · Entry points · 2025 report, page 4 | 0.03 ppm | — | 0.05 ppm guideline | Within the guideline |
| Seleniumhighest measured · range ND to 1.4 · listed as a violation in the report · sampled 2024 · Entry points · 2025 report, page 4 | 1.4 ppb | 30 ppb | 50 ppb | Below the health goal |
| Zinchighest measured · range ND to 0.02 · listed as a violation in the report · sampled 2024 · Entry points · 2025 report, page 4 | 0.02 ppm | — | 5 ppm guideline | Within the guideline |
| Sodiumhighest measured · range 32 to 46 · listed as a violation in the report · sampled 2024 · Entry points · 2025 report, page 4 | 46 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.
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.
Radium and uranium
Found: Gross alpha (radioactivity)
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS)
What removes it: Reverse osmosis.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
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