Free Water Quality Reports
Is Your Tap WaterSafe to Drink?
Check hardness, lead levels, and EPA violations for every US city. Based on official government data.
EPA SDWIS Data
Official federal source
Updated Regularly
Latest compliance data
Verified Standards
Compared to EPA MCLs
EPA SDWIS Data
Official federal source
Updated Regularly
Latest compliance data
Verified Standards
Compared to EPA MCLs
EPA SDWIS Data
Official federal source
Updated Regularly
Latest compliance data
Verified Standards
Compared to EPA MCLs
Tap Water Quality in Popular Cities
New York (c)
New York · 8.3M
Los Angeles
California · 3.9M
Boston
Massachusetts · 3.3M
Chicago
Illinois · 2.7M
Miami
Florida · 2.3M
Houston
Texas · 2.2M
San Antonio
Texas · 2.1M
Phoenix
Arizona · 1.7M
Baltimore
Maryland · 1.6M
Philadelphia
Pennsylvania · 1.6M
Las Vegas
Nevada · 1.5M
East Bay
California · 1.4M
San Diego
California · 1.4M
Dallas
Texas · 1.4M
Cleveland
Ohio · 1.3M
Columbus
Ohio · 1.3M
Worth Monitoring
Cities with Water Quality Concerns
These cities have recent EPA violations or elevated contaminant levels
About Us
Making Water Data Accessible
We believe everyone deserves to know what's in their tap water. Our mission is to make EPA water quality data easy to understand and accessible to all Americans, helping you make informed decisions about your drinking water.
All data comes from official EPA sources including the Safe Drinking Water Information System (SDWIS). We update our database regularly to ensure you have access to the most current information available.
Resources
Latest from the Blog
Is Tap Water Safe to Drink? What You Actually Need to Know (2026)
For most Americans, yes — US tap water is among the safest in the world. But the real question is whether your tap water, in your home, is safe right now.
PFAS in Tap Water: What "Forever Chemicals" Mean for Your Drinking Water
PFAS — "forever chemicals" — have been detected in nearly half of US tap water. Here's what the science says, where regulation stands after the 2025 rollback, and what you can actually do about it.
Is Hot Tap Water Safe to Drink?
Filling the kettle from the hot tap to save time? That's a lead risk, not a time-saver. Here's the EPA's actual guidance, who it applies to, and the easy habit change that removes the risk entirely.