Pennsylvania Tap Water Quality Report

Drinking water quality in Pennsylvania faces notable challenges, currently scoring below the national average with a composite safety score of 54.6/100 across 2,184 monitored ZIP codes. According to the EPA's Safe Drinking Water Information System, 4% of ZIP codes in the state have received a failing grade. These scores reflect historical struggles with aging infrastructure, localized contamination events, and recurring health-based violations that require active intervention by local utilities.

The state's water infrastructure has experienced significant compliance hurdles recently, logging a staggering 917 health-based violations over the past 5-year monitoring window out of 12,763 total violations. When a state registers this volume of health-based violations, it often points to systemic challenges such as aging distribution networks, agricultural runoff affecting groundwater, or underfunded rural water systems. Pennsylvania Department of Environmental Protection is responsible for enforcing corrective actions and penalizing systems that repeatedly fail to meet safe drinking water standards.

One of the most pressing concerns for Pennsylvania residents is the elevated risk of lead exposure. EPA models and historical monitoring indicate that 77.2% of ZIP codes in Pennsylvania are classified as High or Very High risk for lead. This is frequently associated with older housing stock built before the 1986 federal ban on lead pipes and solder. Residents living in older homes should strongly consider having their tap water independently tested and utilizing a certified NSF/ANSI 53 water filter for drinking and cooking.