New Hampshire
711 Utilities
Serving: 879,000
Data available: 2014-2019
Contaminants Found: 114
EWG's drinking water quality report for New Hampshire shows results of tests conducted by the water utilities in New Hampshire and provided to EWG by the New Hampshire Department of Environmental Services.
Below are utilities in New Hampshire serving over 10,000 people, listed alphabetically.
Large utilities in New Hampshire
| Utility | Location | People Served |
|---|---|---|
| Aquarion Water - NH | Monroe, NH | 23,000 |
| Concord Water Department | Concord, NH | 44,000 |
| Derry Water Department | Derry, NH | 15,145 |
| Dover Water Department | Dover, NH | 28,000 |
| Exeter Water Department | Exeter, NH | 11,000 |
| Hudson Water Department | Hudson, NH | 16,100 |
| Keene Water Department | Keene, NH | 25,000 |
| Laconia Water Works | Laconia, NH | 15,500 |
| Lebanon Water Department | Lebanon, NH | 10,050 |
| Manchester Water Works | Manchester, NH | 133,000 |
| Merrimack Village District | Merrimack, NH | 25,000 |
| Pennichuck Water Works | Merrimack, NH | 87,682 |
| Portsmouth Water Works | Portsmouth, NH | 33,000 |
| Rochester Water Department | Rochester, NH | 25,000 |
| Salem Water Department | Salem, NH | 18,000 |
| Seabrook Water Department | Seabrook, NH | 14,000 |
| Somersworth Water Works | Somersworth, NH | 12,000 |
| UNH/Durham Water Sys | Durham, NH | 16,000 |
Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in New Hampshire
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in New Hampshire
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
| Utility | Location | People Served | Violation Points |
|---|---|---|---|
| Rochester Water Department | Rochester, NH | 25,000 | 2 |
Contaminants found in New Hampshire above health guidelines
| Found above health guidelines | Found | ||||||
|---|---|---|---|---|---|---|---|
| Contaminant | # of Utilities | People Served | # of Utilities | People Served | |||
Total trihalomethanes (TTHMs) | 280 | 791,468 | 286 | 801,729 | |||
Bromodichloromethane | 246 | 785,078 | 247 | 786,318 | |||
Radium, combined (-226 & -228) | 519 | 760,568 | 523 | 760,444 | |||
Chloroform | 200 | 750,196 | 239 | 775,507 | |||
Haloacetic acids (HAA5) | 151 | 750,153 | 151 | 750,153 | |||
Dibromochloromethane | 232 | 715,430 | 240 | 748,930 | |||
Dichloroacetic acid | 125 | 655,426 | 128 | 686,906 | |||
Trichloroacetic acid | 103 | 623,187 | 104 | 651,187 | |||
Perfluorooctanoic acid (PFOA) | 160 | 536,179 | 160 | 536,179 | |||
Haloacetic acids (HAA9) | 37 | 521,329 | 44 | 594,864 | |||
Chromium (hexavalent) | 39 | 517,829 | 40 | 528,829 | |||
Nitrate | 230 | 362,879 | 274 | 410,625 | |||
Dibromoacetic acid | 62 | 255,619 | 62 | 255,619 | |||
Arsenic | 276 | 199,455 | 276 | 199,455 | |||
Perfluorooctane sulfonate (PFOS) | 79 | 195,167 | 93 | 336,388 | |||
Chlorate | 8 | 152,660 | 43 | 588,479 | |||
Perfluorobutane sulfonate (PFBS) | 54 | 129,589 | 62 | 160,939 | |||
Bromoform | 71 | 107,368 | 141 | 343,086 | |||
Uranium | 276 | 104,396 | 349 | 248,835 | |||
Perfluorohexane sulfonate (PFHXS) | 43 | 98,232 | 63 | 221,505 | |||
Perfluoroheptanoic acid (PFHPA) | 28 | 79,594 | 35 | 242,386 | |||
Nitrate and nitrite | 51 | 63,319 | 76 | 71,909 | |||
Manganese | 72 | 53,850 | 538 | 833,225 | |||
Tetrachloroethylene (perchloroethylene) | 8 | 36,826 | 8 | 36,826 | |||
Bromochloroacetic acid | 22 | 36,750 | 22 | 36,750 | |||
Cadmium | 1 | 9,000 | 1 | 9,000 | |||
Radon | 14 | 5,575 | 14 | 5,575 | |||
Benzene | 1 | 1,688 | 1 | 1,688 | |||
Beryllium | 6 | 1,082 | 10 | 13,982 | |||
1,4-Dioxane | 2 | 723 | 13 | 51,123 | |||
Antimony | 3 | 639 | 4 | 2,389 | |||
Thallium | 2 | 290 | 2 | 290 | |||
Di(2-ethylhexyl) phthalate | 1 | 180 | 11 | 3,818 | |||
Trichloroethylene | 2 | 63 | 5 | 3,411 | |||
Perfluorononanoic acid (PFNA) | 2 | 63 | 5 | 28,024 | |||
Contaminants found in New Hampshire above legal limits
| Contaminant | # of Utilities | People Served | |
|---|---|---|---|
Haloacetic acids (HAA5) | 2 | 2,300 | |
Arsenic | 7 | 2,150 | |
Radium, combined (-226 & -228) | 3 | 405 | |
Total trihalomethanes (TTHMs) | 1 | 55 |