New Hampshire Water Quality
710 water systems serving 920,024 people. 6,219 total violations on record.
Safety Grade Distribution
A
432
61%
B
82
12%
C
133
19%
D
32
5%
F
31
4%
710
Water Systems
920,024
Population Served
6,219
Total Violations
1,524
Health-Based
Most Contaminated Systems
NORTH CONWAY WATER PCT
5,500 served93 violations88 recent
C
NEW HAMPTON VILLAGE PCT
600 served120 violations82 recent
F
FLINTLOCK APTS
30 served76 violations72 recent
C
MOUNTAIN VALE VILLAGE MHP
388 served59 violations53 recent
C
BRAKE HILL ACRES
98 served59 violations52 recent
C
ROLLING RIDGE
58 served67 violations50 recent
F
MERRIMACK VILLAGE DIST
25,500 served55 violations50 recent
C
GREEN VALLEY MOBILE HOME PARK
127 served49 violations48 recent
D
LAMINGTON HILL
35 served52 violations43 recent
F
CANAAN WATER DEPT
684 served48 violations41 recent
D
Cleanest Water Systems
MANCHESTER WATER WORKS
123,500 served0 violations
A
PENNICHUCK WATER WORKS
89,073 served1 violations
A
CONCORD WATER DEPT
44,215 served0 violations
A
PORTSMOUTH WATER WORKS
33,000 served0 violations
A
KEENE WATER DEPT
30,000 served3 violations
A
LACONIA WATER WORKS
21,000 served0 violations
A
DERRY WATER DEPT
17,210 served0 violations
A
UNH/DURHAM WATER SYS
16,000 served0 violations
A
EXETER WATER DEPT
12,236 served23 violations
A
SOMERSWORTH WATER WORKS
12,000 served2 violations
A
Largest Water Systems in New Hampshire
| Water System | Grade | Population | Violations |
|---|---|---|---|
| MANCHESTER WATER WORKS | A | 123,500 | 0 |
| PENNICHUCK WATER WORKS | A | 89,073 | 1 |
| CONCORD WATER DEPT | A | 44,215 | 0 |
| AQUARION WATER/NH | B | 34,000 | 5 |
| PORTSMOUTH WATER WORKS | A | 33,000 | 0 |
| KEENE WATER DEPT | A | 30,000 | 3 |
| DOVER WATER DEPT | B | 29,000 | 3 |
| MERRIMACK VILLAGE DIST | C | 25,500 | 55 |
| ROCHESTER WATER DEPT | C | 25,000 | 5 |
| LACONIA WATER WORKS | A | 21,000 | 0 |
| SALEM WATER DEPT | C | 21,000 | 10 |
| DERRY WATER DEPT | A | 17,210 | 0 |
| HUDSON WATER DEPT | B | 16,700 | 2 |
| UNH/DURHAM WATER SYS | A | 16,000 | 0 |
| SEABROOK WATER DEPT | C | 14,000 | 3 |
| EXETER WATER DEPT | A | 12,236 | 23 |
| SOMERSWORTH WATER WORKS | A | 12,000 | 2 |
| LEBANON WATER DEPT | C | 10,050 | 3 |
| PEASE TRADE PORT | A | 9,900 | 0 |
| BERLIN WATER WORKS | B | 9,575 | 1 |
Contaminants in New Hampshire
Cities in New Hampshire
NASHUA(70)MANCHESTER(18)CONCORD(14)PORTSMOUTH(10)MONROE(8)KEENE(3)DOVER(4)MERRIMACK(4)ROCHESTER(6)SALEM(5)LAKEPORT(1)DERRY(17)HUDSON(2)DURHAM(4)EXETER(19)SEABROOK(3)SOMERSWORTH(2)LEBANON(5)ATKINSON(27)MILFORD(4)BERLIN(1)CLAREMONT(1)HANOVER(1)HOOKSETT(3)PLYMOUTH(5)FRANKLIN(2)LITTLETON(2)NORTH CONWAY(6)WOLFEBORO(6)MOULTONBOROUGH(26)PEMBROKE(2)NEWMARKET(2)NEWPORT(1)MEREDITH(9)PETERBOROUGH(1)GOFFSTOWN(5)INTERVALE(10)RYE(1)JAFFREY(2)GILFORD(22)RAYMOND(5)CONWAY(5)BRISTOL(1)GRANTHAM(1)HINSDALE(2)LINCOLN(1)FARMINGTON(1)WATERVILLE VALLEY(1)HENNIKER(3)NORTH WOODSTOCK(1)WINCHESTER(2)WOODSVILLE(2)CAMPTON(11)CHARLESTOWN(1)NEW LONDON(1)NORTHUMBERLAND(2)GORHAM(2)TILTON(4)EPPING(8)LANCASTER(1)ALTON(4)SUNAPEE(3)GLEN(12)HILLSBOROUGH(1)ENFIELD(5)ASHLAND(2)EPSOM(9)WILTON(1)BETHLEHEM(1)ANTRIM(2)ROLLINSFORD(1)WHITEFIELD(1)BELMONT(9)GREENVILLE(2)SANBORNVILLE(1)N SWANZEY(1)BRENTWOOD(1)CENTER OSSIPEE(3)BEDFORD(17)COLEBROOK(1)HILLSBORO(1)MERIDEN(3)WALPOLE(3)MADISON(1)TROY(1)NORTHWOOD(7)FRANCONIA(2)LISBON(1)CANAAN(2)JACKSON(3)WARNER(2)TWIN MOUNTAIN(1)BARRINGTON(6)BARTLETT(4)MARLBOROUGH(2)FREEDOM(10)LOUDON(4)ALLENSTOWN(1)HAVERHILL(2)STRATHAM(10)