United States Tap Water Quality
US tap water is generally safe by federal standards but lead service lines, PFAS contamination, and disinfection byproducts (trihalomethanes) are widespread concerns. Chromium-6 is unregulated federally despite known health risks. A certified carbon block filter handles most common issues; reverse osmosis is recommended in areas with known PFAS or heavy metal contamination.
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Major cities (41)
New York City
NY
Los Angeles
CA
Chicago
IL
Houston
TX
Phoenix
AZ
Philadelphia
PA
San Antonio
TX
San Diego
CA
Dallas
TX
Austin
TX
Jacksonville
FL
Fort Worth
TX
Columbus
OH
Indianapolis
IN
Charlotte
NC
San Francisco
CA
Seattle
WA
Denver
CO
Washington DC
DC
Oklahoma City
OK
Nashville
TN
Boston
MA
Las Vegas
NV
Detroit
MI
Portland
OR
Memphis
TN
Louisville
KY
Baltimore
MD
Milwaukee
WI
Albuquerque
NM
Tucson
AZ
Kansas City
MO
Atlanta
GA
Raleigh
NC
Miami
FL
Oakland
CA
Minneapolis
MN
Tampa
FL
New Orleans
LA
Cincinnati
OH
Pittsburgh
PA
Covered water utilities (41)
If your area is served by one of these utilities, we have its current data.
- NYC Department of Environmental Protection
- Los Angeles Department of Water and Power
- Chicago Department of Water Management
- Houston Public Works
- City of Phoenix Water Services
- Philadelphia Water Department
- City of San Diego Public Utilities
- San Francisco Public Utilities Commission
- East Bay Municipal Utility District
- Dallas Water Utilities
- Miami-Dade Water and Sewer Department
- Massachusetts Water Resources Authority
- Seattle Public Utilities
- Denver Water
- DC Water
- Great Lakes Water Authority
- City of Atlanta Department of Watershed Management
- San Antonio Water System
- Austin Water
- Las Vegas Valley Water District
- Portland Water Bureau
- Baltimore Department of Public Works
- Memphis Light, Gas and Water
- Milwaukee Water Works
- Minneapolis Water Treatment
- Charlotte Water
- Citizens Energy Group (Indianapolis)
- Columbus Division of Water
- Fort Worth Water
- JEA (Jacksonville)
- Metro Water Services (Nashville)
- Oklahoma City Water Utilities
- Tampa Bay Water
- Louisville Water Company
- City of Raleigh Public Utilities
- Greater Cincinnati Water Works
- Albuquerque Bernalillo County Water Utility
- Tucson Water
- KC Water (Kansas City)
- Sewerage and Water Board of New Orleans
- Pittsburgh Water and Sewer Authority