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Tap water quality report

Colebrook Water Works

EPA monitoring tested this supplier for 76 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

76
contaminants tested
15
detected
1,300
people served
13
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Local government
Counties served
Coos

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

13
health-based violations
178
violations on file
4
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2016-04-01 → 2016-06-30
MCL Health-based Resolved 2016-04-01 → 2016-06-30
MCL Health-based Resolved 2015-01-01 → 2015-01-31
MCL Health-based Resolved 2015-01-01 → 2015-01-31
TT Health-based Resolved 2009-08-15
TT Health-based Resolved 2009-08-15
TT Health-based Resolved 2009-08-15
TT Health-based Resolved 2009-08-15
TT Health-based Resolved 2009-08-15
MCL Health-based Resolved 2002-09-01 → 2002-09-30

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
207.5 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 220 µg/L
26/26 SYR4 2014–2019
Arsenic
9.8 µg/L 98%
of the EPA limit 10 µg/L
worst single sample: 44 µg/L
20/24 SYR4 2014–2017
Nitrate
900 µg/L 9%
of the EPA limit 10000 µg/L
 20/36 SYR4 2014–2019
Lead
11.25 µg/L 75%
of the EPA limit 15 µg/L
worst single sample: 21 µg/L
14/20 SYR4 2016–2019
Barium
12.75 µg/L 0.6%
of the EPA limit 2000 µg/L
worst single sample: 13 µg/L
6/6 SYR4 2014–2017
Chloroform
1.66 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
5/18 SYR4 2014–2019
Bromodichloromethane
2.475 µg/L
No EPA limit set
worst single sample: 2.7 µg/L
4/18 SYR4 2014–2019
Dibromochloromethane
2.305 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
4/18 SYR4 2014–2019
TTHM
7.045 µg/L 8.8%
of the EPA limit 80 µg/L
worst single sample: 7.6 µg/L
4/6 SYR4 2015–2017
Combined Radium (-226 And -228)
0.8800 pCi/L 18%
of the EPA limit 5 pCi/L
worst single sample: 0.9000 pCi/L
2/2 SYR4 2014–2015
Fluoride
139.5 µg/L 3.5%
of the EPA limit 4000 µg/L
worst single sample: 140 µg/L
2/6 SYR4 2014–2017
Bromoform
0.7000 µg/L
No EPA limit set
 1/18 SYR4 2014–2019
Combined Uranium
1 µg/L 3.3%
of the EPA limit 30 µg/L
 1/1 SYR4 2015
Gross Alpha, Excl. Radon And U
0.1000 pCi/L 0.7%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Lead
0.0310 mg/L 207%
above the EPA limit of 0.0150 mg/L
 1/1 LCR 2009
61 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HEIDI LAWTON

Frequently asked questions about Colebrook Water Works

Is Colebrook Water Works tap water safe to drink?

EPA monitoring detected 15 contaminants in Colebrook Water Works's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Colebrook Water Works's water?

EPA monitoring detected Copper, Arsenic, Nitrate, Lead, Barium, and others. The full list with the level and data source for each is above.

How many people does Colebrook Water Works serve?

Colebrook Water Works reports serving 1,300 people in New Hampshire, per its EPA record.

Has Colebrook Water Works had any water quality violations?

The EPA has 178 violations on file for Colebrook Water Works, of which 13 are health-based (a contaminant limit or required treatment was breached) and 4 remain open. The rest are monitoring or reporting failures.

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.