We read 21 results from Ctwc - Naugatuck Region-Central System’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 22,735 people · Water system ID CT0880011 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · Treated water · 2025 report, page 7 | 0.7 ppb | 0.004 ppb | 10 ppb | Above the health goal175x the health goal |
| PFOA (a PFAS)highest measured · range ND to 7.8 · Treated water · 2025 report, page 8 | 7.8 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20292x 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 ND to 12 · Treated water · 2025 report, page 8 | 12 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20293x 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. |
| Bariumhighest measured · Treated water · 2025 report, page 7 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · Treated water · 2025 report, page 7 | 21.3 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest measured · range 0.03 to 1.1 · Distribution system · 2025 report, page 7 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 32 homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 11 | 0.16 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 11.8 to 40.4 · Distribution system · 2025 report, page 8 | 23.5 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 17 to 37.5 · Distribution system · 2025 report, page 8 | 34 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · Treated water · 2025 report, page 7 | 0.58 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested · sampled 2024 · Customer taps · 2025 report, page 11 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · Treated water · 2025 report, page 7 | 0.19 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)highest measured · range ND to 4 · Treated water · 2025 report, page 8 | 4 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFNA (a PFAS)highest measured · range ND to 2.3 · Treated water · 2025 report, page 8 | 2.3 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Sulfatehighest measured · Treated water · 2025 report, page 7 | 11.9 ppm | — | 250 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · range 0.02 to 0.25 · Treated water · 2025 report, page 7 | 0.25 NTU | None set | 1 NTU | Below the legal limit |
| PFBA (a PFAS)highest measured · range ND to 6 · Treated water · 2025 report, page 8 | 6 ppt | None set | None | No health limit |
| PFBS (a PFAS)highest measured · range ND to 5 · Treated water · 2025 report, page 8 | 5 ppt | None set | None | No health limit |
| PFHpA (a PFAS)highest measured · range ND to 2 · Treated water · 2025 report, page 8 | 2 ppt | None set | None | No health limit |
| PFHxA (a PFAS)highest measured · range ND to 3.2 · Treated water · 2025 report, page 8 | 3.2 ppt | None set | None | No health limit |
| Sodiumhighest measured · Treated water · 2025 report, page 7 | 21 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.
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.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS)
What removes it: Reverse osmosis.
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