New Hampshire tap water, by utility.

51 utilities with a full report, serving 738,905 people as they report it. Regulated PFAS turned up at 16 of them.

New Hampshire utilities by population served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Manchester Water Works	Manchester	123,500	PFOA	0
Pennichuck Water Works	Nashua	88,853	None found	0
Concord Water Dept	Concord	44,215	None found	0
Aquarion Water/Nh	Hampton	34,000	PFOA, PFOS	0
Portsmouth Water Works	Portsmouth	33,000	PFOA, PFOS, PFHxS, PFBS	0
Keene Water Dept	Keene	30,000	None found	0
Dover Water Dept	Dover	29,000	None found	0
Merrimack Village Dist	Merrimack	25,500	None found	0
Rochester Water Dept	Rochester	25,000	None found	3
Salem Water Dept	Salem	21,000	PFOA	0
Derry Water Dept	Derry	17,370	PFOA	0
Laconia Water Works	Laconia	17,125	None found	0
Hudson Water Dept	Hudson	16,700	PFOA	0
Unh/Durham Water Sys	Durham	16,000	None found	0
Seabrook Water Dept	Seabrook	14,000	PFOA, PFOS	0
Lebanon Water Dept	Lebanon	13,600	None found	1
Exeter Water Dept	Exeter	12,236	PFOA, PFOS, PFBS	16
Somersworth Water Works	Somersworth	12,200	None found	0
Pease Trade Port	Portsmouth	9,900	None found	0
Hanover Water Dept	Hanover	9,600	None found	0
Berlin Water Works	Berlin	9,575	None found	0
Milford Water Utilities Dept	Milford	9,500	None found	0
Claremont Water Dept	Claremont	9,000	None found	1
Franklin Water Works	Franklin	7,200	None found	0
Hampstead Area Water	Hampstead	7,153	PFOA, PFOS, PFBS	3
Litchfield	Litchfield	6,920	PFOA	0
Plymouth Vlg Water and Sewer	Plymouth	6,700	None found	0
Littleton Water and Light	Littleton	6,500	None found	0
Londonderry	Londonderry	6,255	PFOA	0
Wolfeboro Water and Sewer	Wolfeboro	6,000	None found	0
North Conway Water Pct	Conway	5,500	None found	0
Pembroke Water Works	Pembroke	5,200	PFOS, PFBS	0
Newmarket Water Works	Newmarket	5,030	None found	0
Newport Water Works	Newport	5,000	None found	0
Central Hooksett Water Pct	Hooksett	4,650	PFOA	0
Peterborough Water Works	Peterborough	4,500	None found	0
Rye Water Dist	Rye	4,300	PFOA, PFOS	1
Lower Bartlett Water Pct	Bartlett	3,850	None found	0
Jaffrey Water Works	Jaffrey	3,800	PFOA, PFOS, PFHxS	0
Penacook Boscawen Water Pct	Boscawen	3,800	None found	0
Meredith Water Dept	Meredith	3,750	Not sampled	3
Bristol Water Works	Bristol	3,575	None found	0
Village Dist of Eastman	Grantham	3,400	None found	0
Raymond Water Dept	Raymond	3,300	None found	1
Lincoln Water Works	Lincoln	3,300	Not sampled	6
New London Springfield Water	New London	3,250	None found	0
Little Pond Estates	Bedford	3,000	PFOA	0
Village District of Eidelweiss	Madison	1,200	None found	7
River Run Condos	Bartlett	750	None found	0
Farley Rd Estates	Nashua	85	None found	1
Saco River Forest	Conway	63	None found	0
Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. Data: EPA SDWIS 2026 Q2 and UCMR 5.