Is Colebrook, NH Tap Water Safe? Quality & Contaminants

What was found in Colebrook'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	900 µg/L 9% of the EPA limit 10000 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Copper	207.5 µg/L 16% of the EPA limit 1300 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Fluoride	139.5 µg/L 3.5% of the EPA limit 4000 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2017	1/1	SYR4
Barium	12.75 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2017	1/1	SYR4
Lead	11.25 µg/L 75% of the EPA limit 15 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Arsenic	9.8 µg/L 98% of the EPA limit 10 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2017	1/1	SYR4
TTHM	7.045 µg/L 8.8% of the EPA limit 80 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2017	1/1	SYR4
Bromodichloromethane	2.475 µg/L No EPA limit set Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Dibromochloromethane	2.305 µg/L No EPA limit set Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Chloroform	1.66 µg/L No EPA limit set Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Combined Uranium	1 µg/L 3.3% of the EPA limit 30 µg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2015	1/1	SYR4
Combined Radium (-226 And -228)	0.8800 pCi/L 18% of the EPA limit 5 pCi/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2015	1/1	SYR4
Bromoform	0.7000 µg/L No EPA limit set Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2019	1/1	SYR4
Gross Alpha, Excl. Radon And U	0.1000 pCi/L 0.7% of the EPA limit 15 pCi/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2015	1/1	SYR4
Lead	0.0310 mg/L 207% above the EPA limit of 0.0150 mg/L Main supplier: COLEBROOK WATER WORKS · 1,300 people · 2009	1/1	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 Colebrook

Supplier	Population served
COLEBROOK WATER WORKS	1,300

Frequently asked questions about Colebrook tap water

Is Colebrook tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Colebrook. 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 Colebrook?

1 public water supplier report drinking-water monitoring for Colebrook, New Hampshire to the EPA. Each is listed above with its population served.

What contaminants are in Colebrook's water?

The contaminants EPA monitoring detected in Colebrook include Nitrate, Copper, Fluoride, Barium, Lead. 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.