Question 1

Is Hillsborough Water Works water safe to drink?

Accepted Answer

Hillsborough Water Works (PWS ID: NH1141010) has 737 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 2,000 people using Surface Water sources.

Question 2

How many people does Hillsborough Water Works serve?

Accepted Answer

EPA SDWIS reports that Hillsborough Water Works serves 2,000 people (this public water system's service population, not the municipal population of Hillsborough or any other city). It is a Local-owned system using Surface Water water sources with 907 service connections. The operator address is listed in Hillsborough, New Hampshire.

Question 3

What type of violations does Hillsborough Water Works have?

Accepted Answer

Hillsborough Water Works has 737 total violations: 354 health-based violations (MCL exceedances or treatment failures), 376 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Hillsborough Water Works water?

Accepted Answer

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

Question 5

What water source does Hillsborough Water Works use?

Accepted Answer

Hillsborough Water Works uses Surface Water 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 Hillsborough Water Works sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Hillsborough Water Works ranks #13,610 of 29,740 by people served, and #65 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 Hillsborough Water Works's violation count compare nationally?

Accepted Answer

Hillsborough Water Works has 737 recorded EPA SDWIS violations, fewer than 2% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 98% of that cohort has fewer violations than Hillsborough 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	MCL	187	2014
Total Haloacetic Acids (HAA5)	MCL	144	2014
Coliform (TCR)	MCL	22	2008
Nitrate	MR	8	1994
Coliform (TCR)	MR	7	2005
cis-1,2-Dichloroethylene	MR	7	1996
Xylenes, Total	MR	7	1996
Chromium	MR	7	1996
CYANIDE	MR	7	1996
o-Dichlorobenzene	MR	7	1996
Fluoride	MR	7	1996
p-Dichlorobenzene	MR	7	1996
Mercury	MR	7	1996
Vinyl chloride	MR	7	1996
1,1-Dichloroethylene	MR	7	1996
Selenium	MR	7	1996
trans-1,2-Dichloroethylene	MR	7	1996
1,1,1-Trichloroethane	MR	7	1996
Carbon tetrachloride	MR	7	1996
1,2-Dichloropropane	MR	7	1996
Trichloroethylene	MR	7	1996
1,1,2-Trichloroethane	MR	7	1996
CHLOROBENZENE	MR	7	1996
Toluene	MR	7	1996
Ethylbenzene	MR	7	1996
Styrene	MR	7	1996
Arsenic	MR	7	1996
1,2,4-Trichlorobenzene	MR	7	1996
Barium	MR	7	1996
Thallium, Total	MR	7	1996

Hillsborough Water Works

Hillsborough Water Works standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Hillsborough Water Works

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served