We read 17 results from Southington Water Department’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 43,069 people · Water system ID CT1310011 · 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 30 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 5 | 0.48 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.6x the health goal |
| Gross alpha (radioactivity)highest measured · range ND to 4.89 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 5 | 4.89 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| PFOA (a PFAS)highest measured · range ND to 6.68 · Treated water · 2025 report, page 6 | 6.68 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.7x 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 6.84 · Treated water · 2025 report, page 6 | 6.84 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291.7x 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. |
| Radium (combined 226 + 228)highest measured · range ND to 0.51 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 5 | 0.51 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Uraniumhighest measured · range ND to 1.07 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 5 | 1.07 ppb | 0.6 ppb | 30 ppb | Above the health goal1.8x the health goal |
| Bariumhighest measured · range ND to 0.5 · listed as a violation in the report · Treated water · 2025 report, page 5 | 0.5 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 8.5 to 200 · listed as a violation in the report · Treated water · 2025 report, page 6 | 200 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorinehighest measured · range 0.06 to 1.15 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 1.15 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range ND to 1.1 · listed as a violation in the report · sampled 2024 · Treated water · 2025 report, page 5 | 1.1 ppb | None set | 100 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 3.11 to 76.2 · listed as a violation in the report · Distribution system · 2025 report, page 5 | 76.2 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.3 to 0.99 · listed as a violation in the report · Treated water · 2025 report, page 5 | 0.99 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 1.17 to 3.8 · listed as a violation in the report · Treated water · 2025 report, page 5 | 3.8 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)highest measured · range ND to 2.27 · Treated water · 2025 report, page 6 | 2.27 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Sulfatehighest measured · range ND to 27.2 · listed as a violation in the report · Treated water · 2025 report, page 6 | 27.2 ppm | — | 250 ppm guideline | Within the guideline |
| PFBS (a PFAS)highest measured · range ND to 5.88 · Treated water · 2025 report, page 6 | 5.88 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 5.47 to 70.4 · Treated water · 2025 report, page 6 | 70.4 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. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Southington Water Department’s water between Apr 2023 and Jul 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA8 pptFound in 8 of 14 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS6 pptFound in 6 of 14 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS4 pptFound in 3 of 14 samples · highest resultNo federal limit in force for this one
- Lithium9.01 ppbFound in 1 of 14 samples · highest resultBelow EPA’s health reference level of 10 ppb
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.
Copper
Found: Copper
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Uranium
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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