Question 1

Is Colebrook Water Works water safe to drink?

Accepted Answer

Colebrook Water Works (PWS ID: NH0481010) has 173 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,300 people using Groundwater sources.

Question 2

How many people does Colebrook Water Works serve?

Accepted Answer

EPA SDWIS reports that Colebrook Water Works serves 1,300 people (this public water system's service population, not the municipal population of Colebrook or any other city). It is a Local-owned system using Groundwater water sources with 523 service connections. The operator address is listed in Colebrook, New Hampshire.

Question 3

What type of violations does Colebrook Water Works have?

Accepted Answer

Colebrook Water Works has 173 total violations: 13 health-based violations (MCL exceedances or treatment failures), 145 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Colebrook Water Works water?

Accepted Answer

No PFAS testing data is available for Colebrook Water Works under the EPA's UCMR5 monitoring program.

Question 5

What water source does Colebrook Water Works use?

Accepted Answer

Colebrook Water Works uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

Where does Colebrook Water Works sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Colebrook Water Works ranks #17,160 of 29,740 by people served, and #93 of 284 in New Hampshire. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Colebrook Water Works's violation count compare nationally?

Accepted Answer

Colebrook Water Works has 173 recorded EPA SDWIS violations, fewer than 17% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 83% of that cohort has fewer violations than Colebrook Water Works. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

Contaminant	Category	Count	Latest
TTHM	MR	10	2021
Chlorine	MR	10	2016
Total Haloacetic Acids (HAA5)	MR	10	2021
Public Notice	Other	8	2015
Coliform (TCR)	MCL	6	2015
Nitrate	MR	6	2007
Xylenes, Total	MR	5	2007
o-Dichlorobenzene	MR	5	2007
1,1-Dichloroethylene	MR	5	2007
trans-1,2-Dichloroethylene	MR	5	2007
1,2-Dichloroethane	MR	5	2007
1,1,1-Trichloroethane	MR	5	2007
Carbon tetrachloride	MR	5	2007
Trichloroethylene	MR	5	2007
1,2-Dichloropropane	MR	5	2007
1,1,2-Trichloroethane	MR	5	2007
CHLOROBENZENE	MR	5	2007
Benzene	MR	5	2007
Toluene	MR	5	2007
Ethylbenzene	MR	5	2007
1,2,4-Trichlorobenzene	MR	5	2007
cis-1,2-Dichloroethylene	MR	5	2007
DICHLOROMETHANE	MR	5	2007
p-Dichlorobenzene	MR	5	2007
Vinyl chloride	MR	5	2007
Tetrachloroethylene	MR	5	2007
Styrene	MR	5	2007
Lead and Copper Rule	TT	5	2009
Consumer Confidence Rule	Other	4	2008
E. COLI	MR	4	2022

Colebrook Water Works

Colebrook Water Works standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Colebrook Water Works

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served