Compare Water Quality
See side-by-side water quality comparisons between any two US cities. Compare contaminant levels, safety scores, and EPA compliance data.
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How Water Quality Comparisons Work
Our water quality comparison tool lets you see side-by-side differences between any two US cities. Each comparison includes:
- Overall Safety Scores - Letter grades from A+ to F based on EPA data
- Contaminant Levels - Detailed breakdown of all detected contaminants
- Compliance Records - EPA violation history and resolution status
- Infrastructure Quality - Age and condition of water systems
- Key Differences - Which city has better water in each category
All data is sourced from the EPA's Safe Drinking Water Information System (SDWIS) and updated quarterly.