Fair — Average Score 65/100
State Overview
Water quality across Mississippi receives an overall grade of C (Fair) with an average score of 65 out of 100, based on EPA compliance data from 436 ZIP codes statewide. This is 10 points below the national average of 75, suggesting significant water quality challenges that affect residents statewide. Approximately 18% of ZIP codes (79 areas) receive a D or F grade, indicating communities with notable water quality concerns that warrant attention. The lowest-scoring area is ZIP code 39202 (Jackson) with a score of 28/100. 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