Water Quality: Twin Rocks, PA
1 water system • 1,650 people served
Multiple Health ViolationsWater Quality Summary
Twin Rocks is served by 1 public water system with a combined service population of 1,650 people, and has 67 EPA Safe Drinking Water Act violations on record. Critically, 36 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Twin Rocks's violation count is 75% below the national average for Pennsylvania. Contaminants associated with violations include Fecal Coliform, TTHM, Total Haloacetic Acids (HAA5).
Contaminants Found
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
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 Twin Rocks
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| BLACKLICK VALLEY MUNI AUTH | PA4110077 | Surface Water | 1,650 | 67 |
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 Pennsylvania
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.