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Water Quality by State

Free drinking water quality reports for 38,767 U.S. ZIP codes, based on EPA monitoring data. Choose a state to see the cities and ZIP codes covered.

• Alabama (783)
• Alaska (270)
• American Samoa (1)
• Arizona (528)
• Arkansas (665)
• California (2,310)
• Colorado (624)
• Connecticut (402)
• Delaware (96)
• District of Columbia (270)
• Florida (1,442)
• Georgia (912)
• Guam (7)
• Hawaii (132)
• Idaho (309)
• Illinois (1,525)
• Indiana (938)
• Iowa (1,053)
• Kansas (735)
• Kentucky (912)
• Louisiana (616)
• Maine (454)
• Maryland (569)
• Massachusetts (661)
• Michigan (1,141)
• Minnesota (886)
• Mississippi (498)
• Missouri (1,104)
• Montana (398)
• Nebraska (620)
• Nevada (249)
• New Hampshire (267)
• New Jersey (681)
• New Mexico (422)
• New York (1,952)
• North Carolina (1,073)
• North Dakota (407)
• Northern Mariana Islands (2)
• Ohio (1,388)
• Oklahoma (715)
• Oregon (467)
• Pennsylvania (2,007)
• Puerto Rico (132)
• Rhode Island (89)
• South Carolina (518)
• South Dakota (389)
• Tennessee (762)
• Texas (2,106)
• U.S. Virgin Islands (6)
• Utah (342)
• Vermont (290)
• Virginia (1,047)
• Washington (683)
• West Virginia (833)
• Wisconsin (887)
• Wyoming (192)