Total Haloacetic Acids (HAA5) violations in New Hampshire
41 active public water systems in New Hampshire had a Total Haloacetic Acids (HAA5) violation in the past three years, 10 of them in the latest quarter of EPA's data. What Total Haloacetic Acids (HAA5) is and why it matters.
Systems with a Total Haloacetic Acids (HAA5) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hudson Water Dept Hudson · Hillsborough County |
16,700 | 1 | 0 | |
|
Claremont Water Dept Claremont · Sullivan County |
9,000 | 2 | 0 | |
|
Wilton Water Works Wilton · Hillsborough County |
1,790 | 2 | 2 | |
|
Contoocook Village Pct Hopkinton · Merrimack County |
1,600 | 3 | 0 | |
|
Canaan Water Dept Canaan · Grafton County |
684 | 5 | 3 | |
|
Andover Village Dist Andover · Merrimack County |
650 | 6 | 4 | |
|
New Hampton Village Pct New Hampton · Belknap County |
600 | 4 | 1 | |
|
Rindge Memorial Sch Rindge · Cheshire County |
450 | 4 | 3 | |
|
W Stewartstown Water Pct Stewartstown · Coos County |
428 | 2 | 2 | |
|
Middleton Elementary School Middleton · Strafford County |
174 | 2 | 0 | |
|
Aquarion Water/nh Hampton · Rockingham County |
34,000 | 1 | 0 | |
|
Salem Water Dept Salem · Rockingham County |
21,080 | 1 | 0 | |
|
Peterborough Water Works Peterborough · Hillsborough County |
4,500 | 1 | 0 | |
|
Goffstown Village Pct Goffstown · Hillsborough County |
3,250 | 3 | 0 | |
|
Charlestown Water Works Charlestown · Sullivan County |
2,850 | 1 | 0 | |
|
Epping Water and Sewer Dept Epping · Rockingham County |
1,600 | 2 | 0 | |
|
Emerald Lake Hillsborough · Hillsborough County |
1,300 | 3 | 2 | |
|
Waterville Estate Vlg Dist/w Campton · Grafton County |
1,250 | 2 | 0 | |
|
Lisbon Water Dept Lisbon · Grafton County |
1,010 | 3 | 0 | |
|
NO Haverhill Water and Light Haverhill · Grafton County |
750 | 2 | 0 | |
|
Bartlett Village Pct Bartlett · Carroll County |
625 | 3 | 1 | |
|
N Walpole Village District/low Walpole · Cheshire County |
625 | 5 | 1 | |
|
W and E Windham · Rockingham County |
528 | 1 | 0 | |
|
Greenville Est Village Dist Greenville · Hillsborough County |
472 | 3 | 0 | |
|
Plaistow Water Dept Plaistow · Rockingham County |
465 | 1 | 0 | |
|
Cardigan Mountain Sch Canaan · Grafton County |
300 | 2 | 0 | |
|
Crotched Mountain School Greenfield · Hillsborough County |
300 | 7 | 1 | |
|
Granite State Industrial Ctr Bow · Merrimack County |
240 | 2 | 0 | |
|
Sun Valley Hampton · Rockingham County |
200 | 1 | 0 | |
|
Thornhill Condos Stratham · Rockingham County |
175 | 1 | 0 | |
|
Wentworth Cove Estates Laconia · Belknap County |
140 | 2 | 0 | |
|
N Walpole Village Dist/high Walpole · Cheshire County |
125 | 5 | 1 | |
|
Marlborough Estates Marlborough · Cheshire County |
100 | 1 | 0 | |
|
Upper CT Valley Hospital Colebrook · Coos County |
75 | 2 | 0 | |
|
Acorn Sch Stratham · Rockingham County |
60 | 2 | 1 | |
|
Steele Hill Resort Sanbornton · Belknap County |
60 | 4 | 0 | |
|
Stonearch Condo Assn/kirkwall Stratham · Rockingham County |
52 | 1 | 0 | |
|
Greenfield Commons Greenfield · Hillsborough County |
48 | 2 | 0 | |
|
Camelot Court Nottingham · Rockingham County |
45 | 1 | 0 | |
|
The Square on Amherst Amherst · Hillsborough County |
45 | 2 | 0 | |
|
French Pond Estates Haverhill · Grafton County |
27 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Total Haloacetic Acids (HAA5), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Total Haloacetic Acids (HAA5) alone.
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.