Water Quality: Johnstown, PA
7 water systems • 81,025 people served
Multiple Health ViolationsWater Quality Summary
Johnstown is served by 7 public water systems with a combined service population of 81,025 people, and has 712 EPA Safe Drinking Water Act violations on record. Critically, 149 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Johnstown's violation count is 162% above the national average for Pennsylvania. Contaminants associated with violations include Contaminant 2920, 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 Johnstown
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| GREATER JOHNSTOWN WA RIVERSIDE | PA4110034 | Surface Water | 49,500 | 115 |
| HIGHLAND S & W AUTH BEAVERDAM | PA4110017 | Surface Water | 22,617 | 101 |
| SOUTHWESTERN CAMBRIA CNTY AUTH | PA4110041 | Surface Water | 4,400 | 56 |
| EAST TAYLOR MUNI AUTH | PA4110043 | Surface Water | 3,152 | 246 |
| HIGHLAND S & W AUTH LLOYDELL | PA4110015 | Groundwater | 723 | 38 |
| HIGHLAND S&W AUTH NORTHERN END | PA4110016 | Groundwater | 463 | 71 |
| GREATER JOHNSTOWN WA SALTLICK | PA4110014 | Surface Water | 170 | 85 |
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.