Question 1

Is Alton Water Works water safe to drink?

Accepted Answer

Alton Water Works (PWS ID: NH0061010) has 421 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,800 people using Groundwater sources.

Question 2

How many people does Alton Water Works serve?

Accepted Answer

EPA SDWIS reports that Alton Water Works serves 1,800 people (this public water system's service population, not the municipal population of Alton or any other city). It is a Local-owned system using Groundwater water sources with 712 service connections. The operator address is listed in Alton, New Hampshire.

Question 3

What type of violations does Alton Water Works have?

Accepted Answer

Alton Water Works has 421 total violations: 66 health-based violations (MCL exceedances or treatment failures), 344 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Alton Water Works water?

Accepted Answer

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

Question 5

What water source does Alton Water Works use?

Accepted Answer

Alton 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 Alton Water Works sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Alton Water Works ranks #14,467 of 29,740 by people served, and #67 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 Alton Water Works's violation count compare nationally?

Accepted Answer

Alton Water Works has 421 recorded EPA SDWIS violations, fewer than 6% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 94% of that cohort has fewer violations than Alton 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
Coliform (TCR)	MCL	54	2011
Coliform (TCR)	MR	20	2012
1,2,4-Trichlorobenzene	MR	10	2014
cis-1,2-Dichloroethylene	MR	10	2014
Xylenes, Total	MR	10	2014
p-Dichlorobenzene	MR	10	2014
Vinyl chloride	MR	10	2014
1,1-Dichloroethylene	MR	10	2014
trans-1,2-Dichloroethylene	MR	10	2014
1,1,1-Trichloroethane	MR	10	2014
Carbon tetrachloride	MR	10	2014
Trichloroethylene	MR	10	2014
1,1,2-Trichloroethane	MR	10	2014
Tetrachloroethylene	MR	10	2014
CHLOROBENZENE	MR	10	2014
Benzene	MR	10	2014
Ethylbenzene	MR	10	2014
DICHLOROMETHANE	MR	10	2014
o-Dichlorobenzene	MR	10	2014
1,2-Dichloroethane	MR	10	2014
1,2-Dichloropropane	MR	10	2014
Toluene	MR	10	2014
Styrene	MR	10	2014
Nitrate	MR	10	2014
Barium	MR	8	2014
Chromium	MR	8	2014
Selenium	MR	8	2014
Antimony, Total	MR	8	2014
Beryllium, Total	MR	8	2014
Arsenic	MCL	8	2020

Alton Water Works

Alton Water Works standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Alton Water Works

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served