Water Quality: Holliston, MA
1 water system • 15,713 people served
Multiple Health ViolationsWater Quality Summary
Holliston is served by 1 public water system with a combined service population of 15,713 people, and has 231 EPA Safe Drinking Water Act violations on record. Critically, 12 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Holliston's violation count is 622% above the national average for Massachusetts. Contaminants associated with violations include TTHM, Total Haloacetic Acids (HAA5).
Contaminants Found
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Haloacetic acids are associated with increased cancer risk and potential reproductive and developmental effects.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving Holliston
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| HOLLISTON WATER DEPARTMENT | MA2136000 | Groundwater | 15,713 | 231 |
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 Massachusetts
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.