New Hampshire Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), New Hampshire has 681 active community water systems in this extract. PlainEnviro's health-based slice lists 1,444 violation records across 50 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 681 community water systems in New Hampshire. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | NEW HAMPTON VILLAGE PCT Glen | 104 | Yes |
| 2 | ROLLING RIDGE Bartlett | 51 | Yes |
| 3 | BETHLEHEM VILLAGE DIST Bethlehem | 45 | Yes |
| 4 | NORTHPOINTE WATER Thornton | 35 | Yes |
| 5 | CONTOOCOOK VILLAGE PCT Concord | 34 | Yes |
| 6 | LAMINGTON HILL Stratham | 31 | Yes |
| 7 | HIGHLAND PLACE Conway | 28 | 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 | ANDOVER VILLAGE DIST Andover | 22 | Yes |
| 12 | WHISPERING BROOK Intervale | 22 | Yes |
| 13 | ROCKHOUSE MOUNTAIN Conway | 22 | Yes |
| 14 | EXETER WATER DEPT Exeter | 22 | Yes |
| 15 | SOUTH WEARE WATER Weare | 19 | Yes |
| 16 | JOHNSON CREEK Durham | 18 | Yes |
| 17 | EVERGREEN TERRACE Exeter | 18 | Yes |
| 18 | LANDMARK ESTATES CONDOS Atkinson | 18 | Yes |
| 19 | BARTLETT VILLAGE PCT Bartlett | 17 | Yes |
| 20 | ROCK RIMMON COOPERATIVE East Hampstead | 17 | Yes |
| 21 | 175 ESTATES Moultonborough | 16 | Yes |
| 22 | STRATHAM WOODS Stratham | 15 | Yes |
| 23 | FREEDOM VILLAGE CONDOS Gilford | 14 | 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 | VILLAGE DISTRICT OF EIDELWEISS Madison | 13 | Yes |
| 29 | LINCOLN WATER WORKS Lincoln | 12 | Yes |
| 30 | MUIRFIELD CLUSTER Stratham | 12 | Yes |
| 31 | CAMELOT III Derry | 12 | Yes |
| 32 | BELLA BROOK WATER Bow | 11 | Yes |
| 33 | MEREDITH WATER DEPT Meredith | 11 | Yes |
| 34 | NEW CASTLE WATER WORKS New Castle | 11 | Yes |
| 35 | THE DOX CONDOS Nashua | 11 | Yes |
| 36 | GOFFSTOWN VILLAGE PCT Goffstown | 10 | Yes |
| 37 | CROTCHED MOUNTAIN SCHOOL Greenfield | 10 | Yes |
| 38 | JACKSON WATER PCT Jackson | 10 | Yes |
| 39 | ENFIELD WATER DEPT Enfield | 9 | Yes |
| 40 | LOCKE LAKE Nashua | 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 | BIRCHES OF WOLFEBORO COOP Wolfeboro | 7 | Yes |
| 47 | COTTON FARMS MHP Londonderry | 6 | Yes |
| 48 | CORNERSTONE PLACE Bedford | 6 | Yes |
| 49 | 18 HUGHES LN/EFFINGHAM Alton | 6 | Yes |
| 50 | GOVERNORS GREEN Epping | 6 | Yes |
Most Common Contaminants in New Hampshire
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Arsenic | 294 | 52 |
| Revised Total Coliform Rule | 176 | 70 |
| Total Haloacetic Acids (HAA5) | 174 | 13 |
| Lead and Copper Rule | 149 | 91 |
| TTHM | 143 | 14 |
| Groundwater Rule | 141 | 89 |
| Combined Radium (-226 and -228) | 81 | 13 |
| Combined Uranium | 81 | 15 |
| Gross Alpha, Excl. Radon and U | 51 | 8 |
| Beryllium, Total | 39 | 3 |
| Nitrate | 37 | 4 |
| Fluoride | 28 | 5 |
| Surface Water Treatment Rule | 13 | 4 |
| CARBON, TOTAL | 11 | 1 |
| Antimony, Total | 11 | 2 |
Cities with Water Quality Issues
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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
Read our methodology - how this data is sourced, computed, and verified.