We read 10 results from Plainfield Water Works’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 34,477 people · Water system ID IN5232020 · 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 |
|---|---|---|---|---|
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 3 | 0.41 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.4x the health goal |
| Fluoridehighest measured · range 0.52 to 1.65 · sampled 2023 · Treated water · 2025 report, page 3 | 1.65 ppm | 1 ppm | 4 ppm | Above the health goal1.7x the health goal |
| Gross alpha (radioactivity)highest measured · range 0.45 to 1.18 · sampled 2020 · Treated water · 2025 report, page 3 | 1.18 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 3 | 1.69 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal8.5x the health goal |
| Radium (combined 226 + 228)highest measured · range ND to 1.5 · sampled 2024 · Treated water · 2025 report, page 3 | 1.5 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.28 to 0.56 · sampled 2023 · Treated water · 2025 report, page 3 | 0.56 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 1 to 2 · Distribution system · 2025 report, page 3 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range 7.25 to 16 · Distribution system · 2025 report, page 3 | 16 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 22 to 53 · Distribution system · 2025 report, page 3 | 53 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range ND to 2.11 · Treated water · 2025 report, page 3 | 2.11 ppm | 10 ppm | 10 ppm | Below the health goal |
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 Plainfield Water Works’s water between Mar 2025 and Oct 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFBS3.8 pptFound in 1 of 6 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: Copper, Lead
What removes it: Reverse osmosis or Certified carbon block or RO.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
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