New Hampshire Water Quality
Health violation data for 678 community water systems in New Hampshire. Based on EPA Safe Drinking Water Information System (SDWIS) data.
Water Systems
678
Total Violations
1,402
Systems with Violations
50
Cities with Issues
117
Water Systems with Most Violations
| # | Water System | Violations | Health |
|---|---|---|---|
| 1 | NEW HAMPTON VILLAGE PCT Glen | 99 | Yes |
| 2 | BETHLEHEM VILLAGE DIST Bethlehem | 45 | Yes |
| 3 | ROLLING RIDGE Bartlett | 40 | Yes |
| 4 | LAMINGTON HILL Stratham | 31 | Yes |
| 5 | HIGHLAND PLACE Conway | 28 | Yes |
| 6 | CONTOOCOOK VILLAGE PCT Concord | 26 | Yes |
| 7 | NORTHPOINTE WATER Thornton | 26 | Yes |
| 8 | FREEDOM HILL/PINE RIDGE EST Loudon | 25 | Yes |
| 9 | WARDE REHABILITATION/NURSING Windham | 25 | Yes |
| 10 | EPSOM HEALTHCARE CTR Epsom | 24 | Yes |
| 11 | WHISPERING BROOK Intervale | 22 | Yes |
| 12 | ROCKHOUSE MOUNTAIN Conway | 22 | Yes |
| 13 | MONTROSE CONDOS Epping | 22 | Yes |
| 14 | EXETER WATER DEPT Exeter | 21 | Yes |
| 15 | ANDOVER VILLAGE DIST Andover | 20 | Yes |
| 16 | SOUTH WEARE WATER Weare | 19 | Yes |
| 17 | JOHNSON CREEK Durham | 18 | Yes |
| 18 | EVERGREEN TERRACE Exeter | 18 | Yes |
| 19 | LANDMARK ESTATES CONDOS Pelham | 18 | Yes |
| 20 | BARTLETT VILLAGE PCT Bartlett | 17 | Yes |
| 21 | ROCK RIMMON COOPERATIVE East Hampstead | 17 | Yes |
| 22 | 175 ESTATES Moultonborough | 16 | Yes |
| 23 | BARKLAND ACRES Derry | 15 | Yes |
| 24 | PLAISTOW WATER DEPT Atkinson | 14 | Yes |
| 25 | PROFILE APARTMENTS Madbury | 14 | Yes |
| 26 | GLENCLIFF IMPROVEMENT Glencliff | 14 | Yes |
| 27 | HOLLIS VILLAGE MARKETPLACE Nashua | 13 | Yes |
| 28 | FREEDOM VILLAGE CONDOS Gilford | 12 | Yes |
| 29 | LINCOLN WATER WORKS Lincoln | 12 | Yes |
| 30 | MUIRFIELD CLUSTER Stratham | 12 | Yes |
| 31 | CAMELOT III Derry | 12 | Yes |
| 32 | BELA BROOK WATER Bow | 11 | Yes |
| 33 | MEREDITH WATER DEPT Meredith | 11 | Yes |
| 34 | NEW CASTLE WATER WORKS Portsmouth | 11 | Yes |
| 35 | STRATHAM WOODS Stratham | 11 | Yes |
| 36 | JACKSON WATER PCT Jackson | 10 | Yes |
| 37 | VILLAGE DISTRICT OF EIDELWEISS Madison | 10 | Yes |
| 38 | CROTCHED MOUNTAIN SCHOOL Greenfield | 9 | Yes |
| 39 | LOCKE LAKE Nashua | 8 | Yes |
| 40 | GOFFSTOWN VILLAGE PCT Goffstown | 8 | Yes |
| 41 | LONG POND WOODS Atkinson | 8 | Yes |
| 42 | SUNAPEE WATER WORKS Sunapee | 8 | Yes |
| 43 | ELM BROOK VILLAGE Contoocook | 7 | Yes |
| 44 | CHOCORUA MEADOWS Chocorua | 7 | Yes |
| 45 | WEDIKO SCHOOL Windsor | 7 | Yes |
| 46 | COTTON FARMS MHP East Hampstead | 6 | Yes |
| 47 | 18 HUGHES LN/EFFINGHAM Alton | 6 | Yes |
| 48 | GOVERNORS GREEN Epping | 6 | Yes |
| 49 | HAMPSTEAD AREA WATER Atkinson | 6 | Yes |
| 50 | EMERALD LAKE Hillsboro | 6 | Yes |
Most Common Contaminants in New Hampshire
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Barium | 322 | 52 |
| E. coli | 172 | 69 |
| Haloacetic Acids (HAA5) | 162 | 13 |
| Combined Radium 226/228 | 152 | 92 |
| Fluoride | 140 | 90 |
| Total Trihalomethanes (TTHM) | 135 | 14 |
| Lead & Copper Rule | 80 | 12 |
| Lead (Action Level) | 59 | 12 |
| Copper | 50 | 7 |
| Contaminant 1075 | 28 | 3 |
| Nitrate | 28 | 4 |
| Manganese | 27 | 5 |
| Arsenic | 12 | 4 |
| Chloroform | 11 | 1 |
| Contaminant 1074 | 11 | 2 |
Cities with Water Quality Issues
Derry Claremont Londonderry Merrimack Milford Nashua Pelham Manchester Hooksett Hillsboro Laconia Lincoln Northfield Bow Concord Bennington Fitzwilliam Lancaster Walpole Lebanon North Haverhill Portsmouth Dover Barrington Exeter Rochester Kingston Newfields Wolfeboro Raymond Bedford Salem Durham Rollinsford New Ipswich Atkinson Somersworth Epsom Moultonborough Gilford +77 more
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in New Hampshire are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.