Arsenic violations in New Hampshire
35 active public water systems in New Hampshire had a Arsenic violation in the past three years. What Arsenic is and why it matters.
Systems with a Arsenic violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Epping Water and Sewer Dept Epping · Rockingham County |
1,600 | 2 | 0 | |
|
Allenstown Community School Allenstown · Merrimack County |
608 | 3 | 0 | |
|
Kearsarge Regional Middle Sch Sutton · Merrimack County |
550 | 1 | 0 | |
|
Prospect Mountain High Sch Alton · Belknap County |
500 | 1 | 0 | |
|
Freedom Hill/pine Ridge Est Loudon · Merrimack County |
370 | 3 | 0 | |
|
Moultonborough Central Sch Moultonborough · Carroll County |
330 | 2 | 1 | |
|
Crotched Mountain School Greenfield · Hillsborough County |
300 | 7 | 1 | |
|
McLane Northeast Hopkinton · Merrimack County |
300 | 1 | 0 | |
|
South Weare Water Weare · Hillsborough County |
200 | 3 | 0 | |
|
Birches of Wolfeboro Coop Wolfeboro · Carroll County |
159 | 2 | 0 | |
|
Deer Meadows Hopkinton · Merrimack County |
150 | 2 | 0 | |
|
Annie Oakley MHP Derry · Rockingham County |
127 | 1 | 0 | |
|
Iron Wheel MHP Danville · Rockingham County |
124 | 2 | 0 | |
|
Riverview Manor Condos Raymond · Rockingham County |
110 | 1 | 0 | |
|
NH Auto Dealers Assn Bow · Merrimack County |
104 | 1 | 0 | |
|
Little Tree ED Center Madbury · Strafford County |
100 | 1 | 0 | |
|
Monadnock Comm Early Lng Ctr Peterborough · Hillsborough County |
100 | 1 | 0 | |
|
The Reserve at Snows Brook Plaistow · Rockingham County |
85 | 2 | 0 | |
|
12 Tallwood Bow · Merrimack County |
70 | 3 | 0 | |
|
Weare Town Offices Weare · Hillsborough County |
65 | 2 | 0 | |
|
Presidential Pines/upper Loudon · Merrimack County |
60 | 2 | 1 | |
|
Steele Hill Resort Sanbornton · Belknap County |
60 | 4 | 0 | |
|
Oyster River Condos Lee · Strafford County |
53 | 1 | 0 | |
|
Birches of Bennington Bennington · Hillsborough County |
52 | 1 | 0 | |
|
Greenfield Commons Greenfield · Hillsborough County |
48 | 2 | 0 | |
|
Evergreen Terrace Lee · Strafford County |
45 | 2 | 0 | |
|
PB and JS Family Childcare Bristol · Grafton County |
41 | 3 | 0 | |
|
Bow Safety Bldg Bow · Merrimack County |
40 | 1 | 0 | |
|
Stratham Woods Stratham · Rockingham County |
38 | 3 | 0 | |
|
Sig Sauer Experience Epping · Rockingham County |
36 | 2 | 0 | |
|
Lamington Hill Stratham · Rockingham County |
35 | 5 | 0 | |
|
Bovie Screen Process Printing Bow · Merrimack County |
32 | 8 | 1 | |
|
Hampshire Coop Nursery Sch Hanover · Grafton County |
32 | 2 | 0 | |
|
Rose Meadow Acres New Boston · Hillsborough County |
31 | 4 | 0 | |
|
501 South Street Bow · Merrimack County |
25 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Arsenic, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Arsenic 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.