Water Quality: Merrimack, NH
4 water systems • 25,697 people served
Some ConcernsWater Quality Summary
Merrimack is served by 4 public water systems with a combined service population of 25,697 people, and has 137 EPA Safe Drinking Water Act violations on record. Critically, 3 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Merrimack's violation count is 230% above the national average for New Hampshire. Contaminants associated with violations include Barium, Chlorine Dioxide.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Water Systems Serving Merrimack
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| MERRIMACK VILLAGE DIST | NH1531010 | Groundwater | 25,500 | 55 |
| BROADVIEW CONDOS | NH0882130 | Groundwater | 128 | 4 |
| BOULDER HILLS | NH1852100 | Groundwater | 39 | 2 |
| FLINTLOCK APTS | NH1402010 | Groundwater | 30 | 76 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in New Hampshire
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.