Water Quality: Manchester, NH

18 water systems • 125,976 people served

Multiple Health Violations
112
Total Violations
17
Health-Based Violations
18
Water Systems
125,976
Population Served

Water Quality Summary

Manchester is served by 18 public water systems with a combined service population of 125,976 people, and has 112 EPA Safe Drinking Water Act violations on record. Critically, 17 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Manchester's violation count is 170% above the national average for New Hampshire. Contaminants associated with violations include Barium, Chlorine Dioxide, Disinfection Byproducts, E. coli.

Contaminants Found

Barium

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

Chlorine Dioxide

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

Disinfection Byproducts

Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.

Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter

E. coli

Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.

Common source: Fecal contamination from humans or animals entering the water supply

EPA limit: Zero (no E. coli permitted in drinking water)

Water Systems Serving Manchester

System Name PWSID Source Population Violations
MANCHESTER WATER WORKS NH1471010 Surface Water 123,500 0
CENTURY VILLAGE CONDOS NH1392180 Groundwater 875 2
SAMOSET AT WINNIPESAUKEE NH0882160 Groundwater 343 1
VILLAGES AT CHESTER CONDOS NH0432010 Groundwater 245 5
SEASONS AT LAKE SUNAPEE NH1722010 Groundwater 153 1
BROOKSIDE CROSSING NH0882180 Groundwater 138 3
OLDE COUNTRY VILLAGE NH1392030 Groundwater 130 4
HIGHLAND ESTATES APARTMENTS NH1852060 Groundwater 120 4
RIDGEWOOD ESTATES NH0073030 Groundwater 115 2
STONEBRIDGE VILLAGE NH1932080 Groundwater 60 5
LOUISBURG CIRCLE NH0802030 Groundwater 55 2
GREENFIELD COMMONS NH0974010 Groundwater 48 15
WHIP O WILL CONDOS NH0297020 Groundwater 45 6
SUN LAKE VILLAGE NH0202060 Groundwater 38 0
THE MEADOW AT NORTHWOOD NH1792050 Groundwater 31 3
MADBURY WOODS APARTMENTS NH1456020 Groundwater 30 40
SHERBURN WOODS NH0594030 Groundwater 25 2
ROCKWOOD TERRACE CONDOS NH1472030 Groundwater 25 17

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

Nashua 143 violations • 130,094 served Concord 137 violations • 47,171 served Portsmouth 68 violations • 44,419 served Monroe 52 violations • 36,428 served Keene 19 violations • 30,434 served Dover 17 violations • 29,346 served Merrimack 137 violations • 25,697 served Rochester 22 violations • 25,510 served

View all 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.

Verify at epa.gov • Search ECHO for NH