We read 18 results from Plainfield Township’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 42,271 people · Water system ID MI0005370 · 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 31 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 5 | 2 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal10x the health goal |
| PFOA (a PFAS)average · range ND to 2 · listed as a violation in the report · Treated water · 2025 report, page 4 | 0.51 ppt | 0.007 ppt | 8 ppt (Michigan) now; 4 ppt from 2029 | Above the health goal73x the health goal |
| PFOS (a PFAS)average · range ND to 3.7 · listed as a violation in the report · Treated water · 2025 report, page 4 | 3.21 ppt | 1 ppt | 16 ppt (Michigan) now; 4 ppt from 2029 | Above the health goal3.2x the health goal |
| Bariumsingle sample · listed as a violation in the report · sampled 2021 · Treated water · 2025 report, page 4 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 69.1 to 100 · listed as a violation in the report · Treated water · 2025 report, page 5 | 100 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest running annual average · range 0.15 to 1.16 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 0.74 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)single sample · listed as a violation in the report · sampled 2022 · Treated water · 2025 report, page 4 | 1.51 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of 31 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2025 report, page 5 | Not detected | 0.3 ppm | 1.3 ppm (action level) | Not detected |
| Disinfection byproducts (HAA5)highest running annual average · range 6.4 to 19.6 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 14.8 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 32.4 to 86.1 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 70.6 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.46 to 0.8 · listed as a violation in the report · Treated water · 2025 report, page 4 | 0.8 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 4 | 1.26 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 2.5 · listed as a violation in the report · Treated water · 2025 report, page 4 | 0.63 ppt | None set | 51 ppt (Michigan) now; 10 ppt from 2029 | Below the legal limit |
| Sulfatesingle sample · listed as a violation in the report · Treated water · 2025 report, page 5 | 48.7 ppm | — | 250 ppm guideline | Within the guideline |
| Hardnesshighest measured · range 8.42 to 12.9 · Treated water · 2025 report, page 5 | 12.9 gpg (220 ppm) | — | — | Very hard |
| PFBS (a PFAS)average · range ND to 4.1 · listed as a violation in the report · Treated water · 2025 report, page 4 | 3.83 ppt | None set | None | No health limit |
| PFHxA (a PFAS)average · range ND to 2.2 · listed as a violation in the report · Treated water · 2025 report, page 4 | 1.03 ppt | None set | None | No health limit |
| Sodiumsingle sample · Treated water · 2025 report, page 5 | 37 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 Plainfield Township’s water between Apr 2024 and Dec 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFBS5.1 pptFound in 4 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS)
What removes it: Reverse osmosis.
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