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Tap water quality report

Colchester, NY

EPA monitoring detected 17 contaminants across the 3 water suppliers serving Colchester. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

3
water suppliers
860
people served
17
contaminants found
New York rankings Lead in New York PFAS in New York

What was found in Colchester'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
840 µg/L 8.4%
of the EPA limit 10000 µg/L
 3/3 SYR4
Barium
632 µg/L 32%
of the EPA limit 2000 µg/L
 3/3 SYR4
Copper
186 µg/L 14%
of the EPA limit 1300 µg/L
 2/3 SYR4
TTHM
37.7 µg/L 47%
of the EPA limit 80 µg/L
 3/3 SYR4
Bromoform
18.1 µg/L
No EPA limit set
 1/3 SYR4
Total Haloacetic Acids (HAA5)
12.1 µg/L 20%
of the EPA limit 60 µg/L
 3/3 SYR4
Dibromochloromethane
10.9 µg/L
No EPA limit set
 1/3 SYR4
Bromodichloromethane
5.49 µg/L
No EPA limit set
 1/3 SYR4
Dichloroacetic Acid
4.81 µg/L
No EPA limit set
 1/3 SYR4
Dibromoacetic Acid
4.78 µg/L
No EPA limit set
 1/3 SYR4
Arsenic
3.8 µg/L 38%
of the EPA limit 10 µg/L
 1/3 SYR4
Selenium
3.6 µg/L 7.2%
of the EPA limit 50 µg/L
 1/3 SYR4
Chloroform
3.19 µg/L
No EPA limit set
 2/3 SYR4
Trichloroacetic Acid
2.51 µg/L
No EPA limit set
 1/3 SYR4
Lead
1.1 µg/L 7.3%
of the EPA limit 15 µg/L
 1/3 SYR4
Combined Radium (-226 And -228)
0.2000 pCi/L 4%
of the EPA limit 5 pCi/L
 1/3 SYR4
Lead
0.0182 mg/L 121%
above the EPA limit of 0.0150 mg/L
 3/3 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 Colchester

SupplierPopulation served
DOWNSVILLE WATER DISTRICT 617
COOKS FALLS WATER DISTRICT 150
CORBETT COMMUNITY CORP. 93

Frequently asked questions about Colchester tap water

Is Colchester tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Colchester. 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 Colchester?

3 public water suppliers report drinking-water monitoring for Colchester, New York to the EPA. Each is listed above with its population served.

What contaminants are in Colchester's water?

The contaminants EPA monitoring detected in Colchester include Nitrate, Barium, Copper, TTHM, Bromoform. 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.