Jefferson Hills, PA vs Pittsburgh, PA

When comparing tap water quality between Jefferson Hills, PA and Pittsburgh, PA, Jefferson Hills currently holds a substantial 20-point lead in average WaterQ score, with a score of 100 out of 100 versus 80 for Pittsburgh. Jefferson Hills, PA carries an A grade while Pittsburgh, PA carries a B. A WaterQ score reflects an aggregate of EPA-reported violations, monitoring data, and compliance history across all public water systems serving each city, so a higher score generally indicates fewer recent violations and a stronger compliance record, though it does not guarantee that every tap in the city tests identically.

Pittsburgh, PA is the larger of the two, with 862,325 more residents than Jefferson Hills. Pittsburgh is served by 19 public water systems, compared with 1 in Jefferson Hills — a difference of 18 systems. A larger number of systems often reflects a more fragmented distribution network spanning multiple utilities, suburbs, or rural service areas, while a single large utility serving a big population can benefit from economies of scale in treatment and monitoring, but may also face more complex, aging infrastructure to maintain.

For residents of either Jefferson Hills or Pittsburgh, the most useful next step is to look up the specific water system that serves your address, since city-wide averages combine results from every system in the area. Visit the Jefferson Hills or Pittsburgh city pages below for a breakdown of local systems, recent violations, and contaminant-specific data, or browse WaterQ's contaminants directory to learn what each measured substance means for health.