New Hampshire
Rockingham County drinking water quality
554 active public water systems serve 271,624 people in Rockingham County. 400 are compliant, 154 had at least one EPA violation in the past three years, 4 are designated serious violators, and 8 carry a health flag.
Active systems
554
199 community systems
People served
272K
by public water systems
Systems with violations
154
28% of active systems, past 3 years
Serious violators
4
8 systems carry a health flag
Needs attention
Rock Rimmon Cooperative
NH0583050 · Danville · Community water system · Serves 200
1 rule violated in the past three years. Unresolved: Ground Water Rule.
Country Club for Kids
NH0875030 · Fremont · Non-Transient non-community system · Serves 61
2 rules violated in the past three years
153 Lafayette RD Water System
NH1048120 · Hampton Falls · Transient non-community system · Serves 30
1 rule violated in the past three years
Robertos
NH1798180 · Northwood · Transient non-community system · Serves 30
3 rules violated in the past three years. Unresolved: Revised Total Coliform Rule, Ground Water Rule, and Public Notice Rule and Revised PN Rule.
Timberlane Middle Sch
NH1935020 · Plaistow · Non-Transient non-community system · Serves 897
1 rule violated in the past three years. Unresolved: Lead and Copper Rule.
Continental Recreation Park
NH1398080 · Londonderry · Transient non-community system · Serves 200
2 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.
Westgate Estates
NH1972060 · Raymond · Community water system · Serves 115
3 rules violated in the past three years. Unresolved: Ground Water Rule.
Carriage Towne Kids
NH1275050 · Kingston · Non-Transient non-community system · Serves 95
2 rules violated in the past three years. Unresolved: Lead and Copper Rule and Public Notice Rule and Revised PN Rule.
George B White Bldg
NH0595010 · Deerfield · Non-Transient non-community system · Serves 50
1 rule violated in the past three years. Unresolved: Lead and Copper Rule.
108 Express Mini Mart
NH1758050 · Newton · Transient non-community system · Serves 30
1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
Community water systems
199 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Aquarion Water/nh Hampton |
34,000 | 1 | 0 | |
|
Portsmouth Water Works Portsmouth |
33,000 | 0 | 0 | |
|
Salem Water Dept Salem |
21,080 | 1 | 0 | |
|
Derry Water Dept Derry |
17,528 | 0 | 0 | |
|
Seabrook Water Dept Seabrook |
14,000 | 1 | 0 | |
|
Exeter Water Dept Exeter |
12,236 | 2 | 1 | |
|
Pease Trade Port Portsmouth |
9,900 | 0 | 0 | |
|
Hampstead Area Water Hampstead |
7,153 | 0 | 0 | |
|
Londonderry Londonderry |
6,255 | 0 | 0 | |
|
Newmarket Water Works Newmarket |
5,030 | 0 | 0 | |
|
Rye Water Dist Rye |
4,300 | 1 | 0 | |
|
Raymond Water Dept Raymond |
3,300 | 1 | 0 | |
|
Epping Water and Sewer Dept Epping |
1,600 | 2 | 0 | |
|
Drew Woods Derry |
1,413 | 0 | 0 | |
|
Rockingham County Complex Brentwood |
1,387 | 1 | 0 | |
|
Exeter River Mobile Home Park Exeter |
980 | 0 | 0 | |
|
New Castle Water Works New Castle |
910 | 1 | 0 | |
|
Brook Park Ests Londonderry |
880 | 0 | 0 | |
|
Vlg of Northwood Rdg Wtr Dist Northwood |
688 | 0 | 0 | |
|
Green Hills Ests Raymond |
618 | 0 | 0 | |
|
Newfields Vlg Water and Sewer Newfields |
550 | 0 | 0 | |
|
W and E Windham |
528 | 1 | 0 | |
|
Maple Hill Acres Derry |
500 | 0 | 0 | |
|
Whispering Winds Windham |
488 | 0 | 0 | |
|
Colby Pond Danville |
485 | 0 | 0 | |
|
Plaistow Water Dept Plaistow |
465 | 1 | 0 | |
|
River Run Exeter |
411 | 0 | 0 | |
|
Cotton Farms MHP Danville |
390 | 0 | 0 | |
|
Avery Estates Londonderry |
383 | 0 | 0 | |
|
Ackerman Retirement Park Salem |
350 | 0 | 0 | |
|
Twin Ridge Condos Plaistow |
348 | 0 | 0 | |
|
Golden Brook Windham |
328 | 0 | 0 | |
|
Tranquility Estates Raymond |
315 | 2 | 0 | |
|
Oakwood Terrace Derry |
310 | 0 | 0 | |
|
Ministerial/parrish Hills Londonderry |
305 | 0 | 0 | |
|
Lancaster Farms Salem |
303 | 0 | 0 | |
|
Glen Ridge Dev Derry |
263 | 0 | 0 | |
|
Maple Haven Derry |
258 | 0 | 0 | |
|
Oakridge Condos Londonderry |
250 | 0 | 0 | |
|
Maplevale and Cricket Hill East Kingston |
248 | 0 | 0 | |
|
Sargent Woods Newton |
230 | 0 | 0 | |
|
Great Bay Water System Newmarket |
228 | 0 | 0 | |
|
Springwood Hills Londonderry |
228 | 0 | 0 | |
|
Blackrocks Village Fremont |
226 | 0 | 0 | |
|
Montrose Condos Stratham |
210 | 0 | 0 | |
|
Hemlock Haven Hampton |
207 | 2 | 0 | |
|
Woodlands Epping |
203 | 0 | 0 | |
|
Cornerstone Estates Sandown |
202 | 0 | 0 | |
|
Rock Rimmon Cooperative Danville |
200 | 1 | 1 | |
|
Sun Valley Hampton |
200 | 1 | 0 |
Non-community systems (355: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (421, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Hampshire records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.