Carol Stream, IL vs Godfrey, IL

When comparing tap water quality between Carol Stream, IL and Godfrey, IL, Godfrey currently holds a noticeable 14-point lead in average WaterQ score, with a score of 85 out of 100 versus 71 for Carol Stream. Carol Stream, IL carries a C grade while Godfrey, IL 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.

Godfrey, IL is the larger of the two, with 720,687 more residents than Carol Stream. Godfrey is served by 35 public water systems, compared with 1 in Carol Stream — a difference of 34 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 Carol Stream or Godfrey, 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 Carol Stream or Godfrey 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.