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New Hampshire Water Quality
2,453 public water systems serving 1,242,123 people.
Water Systems
2,453
Total Violations
155,970
Violation Rate
90.2%
PFAS Detection
45.1%
23 of 51 tested
Largest Water Systems
MANCHESTER WATER WORKS
MANCHESTER, NH · 123,500 served
PENNICHUCK WATER WORKS
NASHUA, NH · 89,073 served
CONCORD WATER DEPT
CONCORD, NH · 44,215 served
AQUARION WATER/NH
MONROE, NH · 34,000 served
PORTSMOUTH WATER WORKS
PORTSMOUTH, NH · 33,000 served
KEENE WATER DEPT
KEENE, NH · 30,000 served
DOVER WATER DEPT
DOVER, NH · 29,000 served
MERRIMACK VILLAGE DIST
MERRIMACK, NH · 25,500 served
ROCHESTER WATER DEPT
ROCHESTER, NH · 25,000 served
LACONIA WATER WORKS
LAKEPORT, NH · 21,000 served
SALEM WATER DEPT
SALEM, NH · 21,000 served
DERRY WATER DEPT
DERRY, NH · 17,210 served
HUDSON WATER DEPT
HUDSON, NH · 16,700 served
UNH/DURHAM WATER SYS
DURHAM, NH · 16,000 served
SEABROOK WATER DEPT
SEABROOK, NH · 14,000 served
EXETER WATER DEPT
EXETER, NH · 12,236 served
SOMERSWORTH WATER WORKS
SOMERSWORTH, NH · 12,000 served
LEBANON WATER DEPT
LEBANON, NH · 10,050 served
PEASE TRADE PORT
PORTSMOUTH, NH · 9,900 served
BERLIN WATER WORKS
BERLIN, NH · 9,575 served
Most Violations
#1 SEABROOK WATER DEPT SEABROOK
1,029 #2 ERROL WATER WORKS/WEST ERROL
973 #3 MORNINGSIDE DRIVE DERRY
934 #4 VIEW POINT COOP SWANZEY
928 #5 GLENCLIFF IMPROVEMENT GLENCLIFF
872 #6 WESTVIEW MEADOWS BELMONT
866 #7 PLEASANT VALLEY PARK ESTATES WINNISQUAM
757 #8 HILLSBOROUGH WATER WORKS HILLSBOROUGH
737 #9 BOUMIL GROVE CONDOS ANDOVER
706 #10 ORFORD VILLAGE DIST ORFORD
704 #11 20 JAFFREY RD NEW IPSWICH
694 #12 GUNSTOCK GLEN WATER MOULTONBOROUGH
678 #13 PROFILE APARTMENTS MADBURY
669 #14 HAWTHORNE VILLAGE SOUTHBORO
630 #15 WAGON WHEEL LONDONDERRY
628 Counties in New Hampshire
Hillsborough
280 systems · 336,342 served
· 17,880 violations
Rockingham
559 systems · 273,232 served
· 32,389 violations
Merrimack
247 systems · 124,101 served
· 14,635 violations
Strafford
132 systems · 107,387 served
· 8,921 violations
Grafton
269 systems · 101,638 served
· 20,540 violations
Carroll
363 systems · 80,560 served
· 21,120 violations
Belknap
255 systems · 74,926 served
· 16,111 violations
Cheshire
170 systems · 69,097 served
· 12,313 violations
Coos
113 systems · 41,156 served
· 7,377 violations
Sullivan
65 systems · 33,684 served
· 4,684 violations