Free tap water grades for 1,100+ water systems & 10,000+ ZIP codesFree tap water grades for 10,000+ ZIP codes Official EPA compliance records · Independent ratings

Water Quality Ratings by State

Browse independent grades for every public water system in the United States. Click your state to see all rated utilities, statewide concerns, and grade distribution.

Alabama
C 17 utilities
Alaska
C 3 utilities
Arizona
D 29 utilities
Arkansas
C 8 utilities
California
D 195 utilities
Colorado
C 27 utilities
Connecticut
D 10 utilities
Delaware
D 4 utilities
District of Columbia
C 2 utilities
Florida
C 100 utilities
GU
A 1 utility
Georgia
C 31 utilities
Hawaii
B 5 utilities
Idaho
C 9 utilities
Illinois
D 29 utilities
Indiana
C 18 utilities
Iowa
D 12 utilities
Kansas
C 8 utilities
Kentucky
C 11 utilities
Louisiana
C 17 utilities
Maine
A 1 utility
Maryland
C 12 utilities
Massachusetts
D 31 utilities
Michigan
B 31 utilities
Minnesota
C 20 utilities
Mississippi
B 4 utilities
Missouri
C 14 utilities
Montana
C 4 utilities
Nebraska
D 4 utilities
Nevada
D 9 utilities
New Hampshire
B 2 utilities
New Jersey
F 27 utilities
New Mexico
D 6 utilities
New York
D 32 utilities
North Carolina
D 35 utilities
North Dakota
C 3 utilities
Ohio
D 29 utilities
Oklahoma
D 10 utilities
Oregon
B 15 utilities
PR
A 8 utilities
Pennsylvania
D 32 utilities
Rhode Island
D 4 utilities
South Carolina
C 14 utilities
South Dakota
C 2 utilities
Tennessee
C 32 utilities
Texas
D 89 utilities
Utah
D 19 utilities
Virginia
C 29 utilities
Washington
D 39 utilities
West Virginia
C 3 utilities
Wisconsin
D 13 utilities
Wyoming
C 2 utilities