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Tap water quality report

Enfield, CT

EPA monitoring detected 41 contaminants across the 4 water suppliers serving Enfield. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

4
water suppliers
122,414
people served
41
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Enfield's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
5976.999999999996 µg/L 60%
of the EPA limit 10000 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 10200 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2019
4/4 SYR4
Nitrate-Nitrite
5938 µg/L 59%
of the EPA limit 10000 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 10155 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2019
4/4 SYR4
Fluoride
1075.9999999999998 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Copper
231.39999999999998 µg/L 18%
of the EPA limit 1300 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 432.6999999999999 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2018
4/4 SYR4
Barium
346.79999999999995 µg/L 17%
of the EPA limit 2000 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
4/4 SYR4
TTHM
80.8 µg/L 101%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Lead
72.10000000000011 µg/L 481%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
4/4 SYR4
Chloroform
62.44 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Nitrite
55.89999999999995 µg/L 5.6%
of the EPA limit 1000 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 59 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2019
2/4 SYR4
Total Haloacetic Acids (HAA5)
27 µg/L 45%
of the EPA limit 60 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Lithium
19.8 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
1/4 UCMR-5
Bromodichloromethane
15 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Trichloroacetic Acid
14 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Dichloroacetic Acid
13.25 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
3/4 SYR4
Dibromochloromethane
6 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 10.189999999999998 µg/L — CONNECTICUT CORRECTIONAL INSTITUTE · 2,385 people · 2019
3/4 SYR4
Bromoform
2.0299999999999985 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 10.099999999999998 µg/L — CONNECTICUT CORRECTIONAL INSTITUTE · 2,385 people · 2019
3/4 SYR4
Arsenic
5.25 µg/L 53%
of the EPA limit 10 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 9.825000000000001 µg/L — CONNECTICUT CORRECTIONAL INSTITUTE · 2,385 people · 2019
3/4 SYR4
Gross Alpha, Excl. Radon And U
5.4035 pCi/L 36%
of the EPA limit 15 pCi/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2018
Highest in the city: 6.4045 pCi/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2019
3/4 SYR4
Combined Radium (-226 And -228)
2.9000000000000004 pCi/L 58%
of the EPA limit 5 pCi/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2018
Highest in the city: 5.9055 pCi/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2019
3/4 SYR4
Combined Uranium
5.455 µg/L 18%
of the EPA limit 30 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2018
2/4 SYR4
Cyanide
5 µg/L 2.5%
of the EPA limit 200 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
1/4 SYR4
Gross Beta Particle Activity
4.632 pCi/L
No EPA limit set
Highest in the city: CONNECTICUT CORRECTIONAL INSTITUTE · 2,385 people · 2019
1/4 SYR4
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 3.9 µg/L — CONNECTICUT CORRECTIONAL INSTITUTE · 2,385 people · 2019
2/4 SYR4
Di(2-ethylhexyl) Phthalate
3.7 µg/L 62%
of the EPA limit 6 µg/L
Highest in the city: SHAKER HEIGHTS WATER COMPANY · 172 people · 2019
1/4 SYR4
Dibromoacetic Acid
2 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
Highest in the city: 2.1349999999999993 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2019
3/4 SYR4
Monochloroacetic Acid
1.295 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
1/4 SYR4
Dichloromethane
1.1 µg/L 22%
of the EPA limit 5 µg/L
Highest in the city: CONNECTICUT CORRECTIONAL INSTITUTE · 2,385 people · 2019
1/4 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
2/4 SYR4
Trichloroethylene
0.9970 µg/L 20%
of the EPA limit 5 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
2/4 SYR4
Tetrachloroethylene
0.7065 µg/L 14%
of the EPA limit 5 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
1/4 SYR4
Antimony, Total
0.2800 µg/L 4.7%
of the EPA limit 6 µg/L
Highest in the city: HAZARDVILLE WATER COMPANY · 18,544 people · 2017
1/4 SYR4
Asbestos
0.1900 MFL 2.7%
of the EPA limit 7 MFL
Highest in the city: SHAKER HEIGHTS WATER COMPANY · 172 people · 2013
1/4 SYR4
Benzo(A)Pyrene
0.0630 µg/L 32%
of the EPA limit 0.2000 µg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019
1/4 SYR4
PFOA
0.0080 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
Highest in the city: 0.0086 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2023
2/4 UCMR-5
PFHXS
0.0030 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
Highest in the city: 0.0081 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2023
2/4 UCMR-5
PFOS
0.0060 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
2/4 UCMR-5
Pfba
0.0050 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
1/4 UCMR-5
PFBS
0.0030 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
Highest in the city: 0.0048 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2023
2/4 UCMR-5
Pfhxa
0.0030 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
Highest in the city: 0.0039 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2023
2/4 UCMR-5
Pfpea
0.0030 µg/L
No EPA limit set
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025
Highest in the city: 0.0032 µg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2023
2/4 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2026
Highest in the city: 0.00070 mg/L — HAZARDVILLE WATER COMPANY · 18,544 people · 2024
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 95th percentile of the system's samples — 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 Enfield

SupplierPopulation served
CTWC - NORTHERN REG-WESTERN SYSTEM 101,313
HAZARDVILLE WATER COMPANY 18,544
CONNECTICUT CORRECTIONAL INSTITUTE 2,385
SHAKER HEIGHTS WATER COMPANY 172

Frequently asked questions about Enfield tap water

Is Enfield tap water safe to drink?

EPA testing detected 41 contaminants in the water serving Enfield. 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 Enfield?

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

What contaminants are in Enfield's water?

The contaminants EPA monitoring detected in Enfield include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. The full list, with the level at the main supplier 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.