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Tap water quality report

Cheshire, CT

EPA monitoring detected 38 contaminants across the 4 water suppliers serving Cheshire. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

4
water suppliers
520,494
people served
38
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Cheshire's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
10300 µg/L 103%
of the EPA limit, in the worst sample — 10000 µg/L
 4/4 SYR4
Nitrate
7400 µg/L 74%
of the EPA limit 10000 µg/L
 4/4 SYR4
Fluoride
2320 µg/L 58%
of the EPA limit 4000 µg/L
 4/4 SYR4
Copper
1550 µg/L 119%
of the EPA limit, in the worst sample — 1300 µg/L
 4/4 SYR4
Barium
664 µg/L 33%
of the EPA limit 2000 µg/L
 4/4 SYR4
Lead
656 µg/L 4373%
of the EPA limit, in the worst sample — 15 µg/L
 3/4 SYR4
Nitrite
448 µg/L 45%
of the EPA limit 1000 µg/L
 4/4 SYR4
TTHM
122.7 µg/L 153%
of the EPA limit, in the worst sample — 80 µg/L
 4/4 SYR4
Chloroform
98 µg/L
No EPA limit set
 3/4 SYR4
Total Haloacetic Acids (HAA5)
94 µg/L 157%
of the EPA limit, in the worst sample — 60 µg/L
 4/4 SYR4
Trichloroacetic Acid
59 µg/L
No EPA limit set
 3/4 SYR4
Dichloroacetic Acid
40 µg/L
No EPA limit set
 3/4 SYR4
Bromodichloromethane
24.6 µg/L
No EPA limit set
 4/4 SYR4
Monochloroacetic Acid
10.4 µg/L
No EPA limit set
 3/4 SYR4
Lithium
9.01 µg/L
No EPA limit set
 1/4 UCMR-5
Gross Beta Particle Activity
8.5 pCi/L
No EPA limit set
 2/4 SYR4
Tetrachloroethylene
8.16 µg/L 163%
of the EPA limit, in the worst sample — 5 µg/L
 1/4 SYR4
Dibromochloromethane
7.2 µg/L
No EPA limit set
 4/4 SYR4
Combined Uranium
6.53 µg/L 22%
of the EPA limit 30 µg/L
 3/4 SYR4
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 1/4 SYR4
Cyanide
5 µg/L 2.5%
of the EPA limit 200 µg/L
 1/4 SYR4
Gross Alpha, Excl. Radon And U
4.5 pCi/L 30%
of the EPA limit 15 pCi/L
 2/4 SYR4
Monobromoacetic Acid
4.5 µg/L
No EPA limit set
 1/4 SYR4
Bromoform
3.3 µg/L
No EPA limit set
 4/4 SYR4
Dibromoacetic Acid
2.7 µg/L
No EPA limit set
 3/4 SYR4
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
 3/4 SYR4
Combined Radium (-226 And -228)
1.7 pCi/L 34%
of the EPA limit 5 pCi/L
 4/4 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/4 SYR4
Trichloroethylene
0.5400 µg/L 11%
of the EPA limit 5 µg/L
 1/4 SYR4
PFOS
0.0107 µg/L
No EPA limit set
 3/4 UCMR-5
PFOA
0.0080 µg/L
No EPA limit set
 3/4 UCMR-5
Pfhxa
0.0058 µg/L
No EPA limit set
 2/4 UCMR-5
Pfba
0.0050 µg/L
No EPA limit set
 2/4 UCMR-5
Pfpea
0.0048 µg/L
No EPA limit set
 3/4 UCMR-5
PFBS
0.0040 µg/L
No EPA limit set
 3/4 UCMR-5
PFHXS
0.0040 µg/L
No EPA limit set
 1/4 UCMR-5
Pfhpa
0.0030 µg/L
No EPA limit set
 1/4 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 4/4 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Cheshire

SupplierPopulation served
REGIONAL WATER AUTHORITY 418,900
MERIDEN WATER DIVISION 58,441
SOUTHINGTON WATER DEPARTMENT 43,069
CRESTVIEW CONDOMINIUM ASSOCIATION 84

Frequently asked questions about Cheshire tap water

Is Cheshire tap water safe to drink?

EPA testing detected 38 contaminants in the water serving Cheshire. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Cheshire?

4 public water suppliers report drinking-water monitoring for Cheshire, Connecticut to the EPA. Each is listed above with its population served.

What contaminants are in Cheshire's water?

The contaminants EPA monitoring detected in Cheshire include Nitrate-Nitrite, Nitrate, Fluoride, Copper, Barium. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.