W Salem, OH vs Columbus, OH

When comparing tap water quality between W Salem, OH and Columbus, OH, W Salem currently holds a noticeable 7-point lead in average WaterQ score, with a score of 93 out of 100 versus 86 for Columbus. W Salem, OH carries an A grade while Columbus, OH 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.

Columbus, OH is the larger of the two, with 1.3 million more residents than W Salem. Columbus is served by 7 public water systems, compared with 1 in W Salem — a difference of 6 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 W Salem or Columbus, 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 W Salem or Columbus 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.