Fair — Average Score 63/100
State Overview
Water quality across Pennsylvania receives an overall grade of C (Fair) with an average score of 63 out of 100, based on EPA compliance data from 1418 ZIP codes statewide. This is 12 points below the national average of 75, suggesting significant water quality challenges that affect residents statewide. Approximately 34% of ZIP codes (480 areas) receive a D or F grade, indicating communities with notable water quality concerns that warrant attention. The lowest-scoring area is ZIP code 19543 (Morgantown) with a score of 10/100. 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.
Lowest Scoring ZIP Codes