Question 1

Is Granite Mills water safe to drink?

Accepted Answer

Granite Mills (PWS ID: NH1086010) has 200 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 30 people using Groundwater sources.

Question 2

How many people does Granite Mills serve?

Accepted Answer

EPA SDWIS reports that Granite Mills serves 30 people (this public water system's service population, not the municipal population of Harrisville or any other city). It is a Private-owned system using Groundwater water sources with 1 service connections. The operator address is listed in Harrisville, New Hampshire.

Question 3

What type of violations does Granite Mills have?

Accepted Answer

Granite Mills has 200 total violations: 4 health-based violations (MCL exceedances or treatment failures), 194 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 Granite Mills water?

Accepted Answer

No PFAS testing data is available for Granite Mills under the EPA's UCMR5 monitoring program.

Question 5

What water source does Granite Mills use?

Accepted Answer

Granite Mills uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

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

How does Granite Mills's violation count compare nationally?

Accepted Answer

Granite Mills has 200 recorded EPA SDWIS violations, fewer than 15% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 85% of that cohort has fewer violations than Granite Mills. 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)	MR	9	1999
1,2,4-Trichlorobenzene	MR	8	1994
cis-1,2-Dichloroethylene	MR	8	1994
Xylenes, Total	MR	8	1994
DICHLOROMETHANE	MR	8	1994
o-Dichlorobenzene	MR	8	1994
p-Dichlorobenzene	MR	8	1994
Vinyl chloride	MR	8	1994
1,1-Dichloroethylene	MR	8	1994
trans-1,2-Dichloroethylene	MR	8	1994
1,2-Dichloroethane	MR	8	1994
1,1,1-Trichloroethane	MR	8	1994
Carbon tetrachloride	MR	8	1994
1,2-Dichloropropane	MR	8	1994
Trichloroethylene	MR	8	1994
1,1,2-Trichloroethane	MR	8	1994
Tetrachloroethylene	MR	8	1994
CHLOROBENZENE	MR	8	1994
Benzene	MR	8	1994
Toluene	MR	8	1994
Ethylbenzene	MR	8	1994
Styrene	MR	8	1994
Lead and Copper Rule	MR	7	1995
Coliform (TCR)	MCL	4	1992
Gross Alpha, Excl. Radon and U	MR	3	1994
Combined Radium (-226 and -228)	MR	3	1994
Nitrite	MR	2	1994
Nitrate	MR	2	1994

Granite Mills

Granite Mills standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Granite Mills

Nationwide peers

Cross-state systems with comparable violation load