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Tap water quality report

Farmington, CT

EPA monitoring detected 43 contaminants across the 6 water suppliers serving Farmington. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

6
water suppliers
509,162
people served
43
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Farmington'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
4670 µg/L 47%
of the EPA limit 10000 µg/L
 5/6 SYR4
Nitrate-Nitrite
4200 µg/L 42%
of the EPA limit 10000 µg/L
 5/6 SYR4
Barium
1258.7 µg/L 63%
of the EPA limit 2000 µg/L
 5/6 SYR4
Copper
1120 µg/L 86%
of the EPA limit 1300 µg/L
 6/6 SYR4
Fluoride
1060 µg/L 27%
of the EPA limit 4000 µg/L
 4/6 SYR4
Lead
181 µg/L 1207%
of the EPA limit, in the worst sample — 15 µg/L
 6/6 SYR4
TTHM
160 µg/L 200%
of the EPA limit, in the worst sample — 80 µg/L
 6/6 SYR4
Chloroform
150 µg/L
No EPA limit set
 6/6 SYR4
2,4-D
100 µg/L 143%
of the EPA limit, in the worst sample — 70 µg/L
 1/6 SYR4
Total Haloacetic Acids (HAA5)
76.21 µg/L 127%
of the EPA limit, in the worst sample — 60 µg/L
 6/6 SYR4
Monobromoacetic Acid
63.179 µg/L
No EPA limit set
 2/6 SYR4
Trichloroacetic Acid
58.366 µg/L
No EPA limit set
 6/6 SYR4
Dichloroacetic Acid
26.8 µg/L
No EPA limit set
 6/6 SYR4
Nitrite
14 µg/L 1.4%
of the EPA limit 1000 µg/L
 1/6 SYR4
Bromodichloromethane
12.3 µg/L
No EPA limit set
 6/6 SYR4
Lithium
11.8 µg/L
No EPA limit set
 1/6 UCMR-5
Tetrachloroethylene
9 µg/L 180%
of the EPA limit, in the worst sample — 5 µg/L
 2/6 SYR4
Dibromochloromethane
7.9 µg/L
No EPA limit set
 6/6 SYR4
Monochloroacetic Acid
7.8 µg/L
No EPA limit set
 4/6 SYR4
Bromoform
7.4 µg/L
No EPA limit set
 3/6 SYR4
Gross Alpha, Excl. Radon And U
7.03 pCi/L 47%
of the EPA limit 15 pCi/L
 3/6 SYR4
Trichloroethylene
6.5 µg/L 130%
of the EPA limit, in the worst sample — 5 µg/L
 1/6 SYR4
cis-1,2-Dichloroethylene
3.5 µg/L 5%
of the EPA limit 70 µg/L
 2/6 SYR4
Dibromoacetic Acid
3.4 µg/L
No EPA limit set
 4/6 SYR4
Arsenic
3.2 µg/L 32%
of the EPA limit 10 µg/L
 1/6 SYR4
Chromium
2.4 µg/L 2.4%
of the EPA limit 100 µg/L
 1/6 SYR4
Combined Uranium
2.2 µg/L 7.3%
of the EPA limit 30 µg/L
 2/6 SYR4
1,2,4-Trichlorobenzene
2 µg/L 2.9%
of the EPA limit 70 µg/L
 1/6 SYR4
Combined Radium (-226 And -228)
1.6 pCi/L 32%
of the EPA limit 5 pCi/L
 3/6 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/6 SYR4
Beryllium, Total
0.6340 µg/L 16%
of the EPA limit 4 µg/L
 1/6 SYR4
1,1,2-Trichloroethane
0.6300 µg/L 13%
of the EPA limit 5 µg/L
 1/6 SYR4
1,1,1-Trichloroethane
0.6200 µg/L 0.3%
of the EPA limit 200 µg/L
 2/6 SYR4
Chlordane
0.3000 µg/L 15%
of the EPA limit 2 µg/L
 1/6 SYR4
Mercury
0.2000 µg/L 10%
of the EPA limit 2 µg/L
 1/6 SYR4
PFOS
0.0080 µg/L
No EPA limit set
 3/6 UCMR-5
Pfba
0.0070 µg/L
No EPA limit set
 2/6 UCMR-5
PFOA
0.0070 µg/L
No EPA limit set
 3/6 UCMR-5
Pfhxa
0.0040 µg/L
No EPA limit set
 2/6 UCMR-5
Pfpea
0.0040 µg/L
No EPA limit set
 1/6 UCMR-5
PFBS
0.0030 µg/L
No EPA limit set
 1/6 UCMR-5
PFHXS
0.0030 µg/L
No EPA limit set
 1/6 UCMR-5
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 6/6 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 Farmington

SupplierPopulation served
METROPOLITAN DISTRICT COMMISSION 390,887
NEW BRITAIN WATER DEPARTMENT 73,534
AQUARION-PLAINVILLE REGIONAL 18,231
CTWC - UNIONVILLE SYSTEM 14,693
AVON WATER CO 11,590
CTWC - CHIMNEY HILL 227

Frequently asked questions about Farmington tap water

Is Farmington tap water safe to drink?

EPA testing detected 43 contaminants in the water serving Farmington. 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 Farmington?

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

What contaminants are in Farmington's water?

The contaminants EPA monitoring detected in Farmington include Nitrate, Nitrate-Nitrite, Barium, Copper, Fluoride. 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.