Nitrate in New Hampshire Drinking Water
New Hampshire has 4,131 public water systems. 2871 have recorded nitrate violations.
Total Systems
4,131
With Violations
2,871
EPA MCL
10
Population Served
1.2M
Nitrate in New Hampshire: Key Facts
Total Water Systems
4,131
Systems with Violations
2,871
Lead Violations
482
Copper Violations
224
EPA Standard
10 mg/L as N
MCLG (goal): 10 mg/L
Water Systems with Violations in New Hampshire
| System | Population | Violations |
|---|---|---|
| STEELE POND DEV | 24 | 1622 |
| LOCKES LOCATION | 45 | 1357 |
| WEST EPPING WATER CO INC | 18 | 1339 |
| SEABROOK WATER DEPT | 14K | 1029 |
| ERROL WATER WORKS/WEST | 183 | 973 |
| MORNINGSIDE DRIVE | 80 | 934 |
| VIEW POINT COOP | 248 | 928 |
| HEMLOCK HILLS | 12 | 877 |
Health Effects of Nitrate Exposure
Blue baby syndrome
Infants under 6 months can develop methemoglobinemia
Thyroid effects
May disrupt thyroid function with chronic exposure
Cancer links
Potential associations with colorectal cancer at high levels
Infants below 6 months can develop methemoglobinemia ('blue baby syndrome'). May also affect adults with certain conditions.
Frequently Asked Questions
Is there nitrate in New Hampshire water?
New Hampshire has 4,131 public water systems. 2871 have recorded nitrate violations based on EPA SDWIS data. If you are on a private well, your water is not covered by these regulations and should be tested independently.
How can I check my New Hampshire water for nitrate?
Search for your water system using the WaterCheck system lookup, or contact your utility and request a copy of your Consumer Confidence Report (CCR). The CCR is published annually and lists all detected contaminants, their levels, and the EPA MCLs. For private wells, contact a state-certified lab for independent testing.
What is the EPA limit for nitrate?
The EPA Maximum Contaminant Level (MCL) for nitrate is 10 mg/L as N. Systems that exceed MCLs are required to notify customers and take corrective action.
Nitrate at a Glance
Source
Runoff from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits
How to Filter Nitrate
- +Reverse osmosis or distillation removes nitrates
- +Boiling does NOT remove nitrates - it concentrates them
- +Do not give well water to infants under 6 months without testing