Idaho Tap Water Quality
Explore tap water quality data for counties across Idaho. View water system reports, track violations, monitor drinking water safety, and check fluoridation status in your community.
Total Counties
58
Communities with public water systems
Total Population
1,541,404
Residents served by public water systems
Water Systems
763
Public water systems statewide
Serious Violators
23
Systems with serious violations
Counties
58
With water systems
Population
1,541,404
Served by water systems
Water Systems
763
Total water systems
Violators
23
Systems with serious violations
Searching by your address yields the most accurate results. Searching by town or water system may not show all systems due to how the EPA categorizes data. Some towns may be listed under counties, and water system boundaries don't always align with town boundaries.
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Idaho Counties
Ada
Population: 495,479
Water Systems: 52
Adams
Population: 2,404
Water Systems: 5
Bannock
Population: 20,244
Water Systems: 22
Bear Lake
Population: 5,323
Water Systems: 11
Benewah
Population: 6,228
Water Systems: 9
Bingham
Population: 22,157
Water Systems: 27
Blackfoot
Population: 50
Water Systems: 1
Blaine
Population: 20,962
Water Systems: 22
Boise
Population: 4,044
Water Systems: 20
Bonner
Population: 28,163
Water Systems: 53
Bonneville
Population: 118,454
Water Systems: 31
Boundary
Population: 10,975
Water Systems: 14
Butte
Population: 1,390
Water Systems: 4
Camas
Population: 441
Water Systems: 1
Canyon
Population: 202,868
Water Systems: 80
Caribou
Population: 4,816
Water Systems: 8
Cassia
Population: 12,863
Water Systems: 13
Clark
Population: 511
Water Systems: 1
Clearwater
Population: 6,030
Water Systems: 13
Custer
Population: 1,618
Water Systems: 4
Dayton
Population: 510
Water Systems: 1
Driggs
Population: 183
Water Systems: 2
Eagle
Population: 25
Water Systems: 1
Elmore
Population: 25,073
Water Systems: 23
Emmett
Population: 100
Water Systems: 1
Fish Haven
Population: 50
Water Systems: 1
Franklin
Population: 10,005
Water Systems: 13
Fremont
Population: 7,210
Water Systems: 10
Gem
Population: 6,912
Water Systems: 6
Gooding
Population: 8,093
Water Systems: 7
Homedale
Population: 53
Water Systems: 1
Idaho
Population: 7,679
Water Systems: 18
Idaho Falls
Population: 165
Water Systems: 4
Jefferson
Population: 9,356
Water Systems: 16
Jerome
Population: 13,447
Water Systems: 6
Kootenai
Population: 158,200
Water Systems: 117
Latah
Population: 40,288
Water Systems: 21
Lemhi
Population: 3,535
Water Systems: 5
Lewis
Population: 2,976
Water Systems: 6
Lincoln
Population: 2,286
Water Systems: 4
Madison
Population: 42,674
Water Systems: 5
Minidoka
Population: 10,793
Water Systems: 9
Mountain Home
Population: 71
Water Systems: 1
Nampa
Population: 87
Water Systems: 2
Nez Perce
Population: 37,803
Water Systems: 12
Oneida
Population: 2,200
Water Systems: 1
Owyhee
Population: 4,643
Water Systems: 7
Payette
Population: 17,126
Water Systems: 7
Pocatello
Population: 57,092
Water Systems: 1
Power
Population: 4,649
Water Systems: 5
Rexburg
Population: 85
Water Systems: 2
Rigby
Population: 110
Water Systems: 2
Saint Anthony
Population: 40
Water Systems: 1
Shoshone
Population: 13,156
Water Systems: 15
Teton
Population: 5,499
Water Systems: 11
Twin Falls
Population: 70,865
Water Systems: 14
Valley
Population: 7,236
Water Systems: 11
Washington
Population: 6,109
Water Systems: 3