Free water quality tool
Check your water quality
Enter your ZIP code to see EPA contaminant data for your water system, compared against both legal limits and health guidelines.
EPA source data
We pull directly from the EPA's Safe Drinking Water Information System — the same data utilities report to federal regulators.
Dual standard comparison
Your water is scored against both EPA legal limits and stricter EWG health guidelines, so you see the full picture.
Matched recommendations
Your results include specific filtration technology recommendations based on exactly which contaminants are elevated in your water.