Pennsylvania Drinking Water Quality Reports by ZIP Code

State Overview

What the Pennsylvania water quality reports include

Water quality across Pennsylvania receives an record-only indicator of C (Mixed record-based signals) with an average score of 64 out of 100, based on EPA compliance data from 1062 ZIP codes statewide. Approximately 15% of ZIP codes (160 areas) receive a D or F grade, indicating communities with notable water quality concerns that warrant attention. The lowest-scoring area is ZIP code 17846 (Millville) with a score of 33/100. Scores are calculated from EPA Safe Drinking Water Information System (SDWIS) violation records, lead and copper testing results, PFAS monitoring data from UCMR5, and enforcement actions over the past 5 years.

Choose a ZIP code below to review the public water systems associated with that area, five-year SDWIS violation history, available lead and copper results, UCMR5 PFAS occurrence records, enforcement actions and the limits of the geographic mapping. These reports describe public records, not the condition of water at an individual tap.