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All 4 cities ranked by water quality score
How Pennsylvania's 4 cities are distributed by water quality grade
4 out of 4 cities meet or exceed a B grade for water quality
Sorted by water quality score from best to worst. Click any city for a detailed water quality report.
| Rank | City | Score | Grade |
|---|---|---|---|
| 1 | Allentown | 95/100 | A+ |
| 2 | Erie | 95/100 | A+ |
| 3 | Pittsburgh | 95/100 | A+ |
| #4 | Philadelphia | 78/100 | B |
The best water quality in Pennsylvania is found in Allentown with a score of 95/100 and a grade of A+. This puts Allentown among the top-performing cities in the country for drinking water safety.
The most concerning water quality is in Philadelphia scoring 78/100 with a grade of B. Residents may want to consider home water testing and filtration options.
The statewide average score is 91/100, which is 19 points above the national average of 72/100. A strong majority (100%) of Pennsylvania cities exceed the national average, indicating generally good water infrastructure across the state.
Allentown has the best water quality in Pennsylvania with a score of 95/100 and a grade of A+. This score is based on contaminant levels, EPA compliance history, and infrastructure quality. Allentown ranks among the top cities nationally for water quality.
Water quality varies across Pennsylvania. The state average score is 91/100. 100% of Pennsylvania cities have good water quality (grade B or better). All cities in Pennsylvania maintain at least a C-grade, though individual results can vary by neighborhood and home plumbing. Always check your specific city's water quality report for the most accurate local information.
Of the 4 cities tracked in Pennsylvania, 0 cities have a D or F grade, indicating significant water quality concerns. 4 out of 4 cities (100%) score above the national average of 72/100. Residents concerned about their water quality can check their city's detailed report for specific contaminant information.
State water quality summary and key statistics
Top 20 cities with the cleanest water
Top-ranked cities nationwide
Cities with the most concerning water
Compare water quality across all 50 states
Side-by-side water quality comparison