Tapcensus

All water systems in Idaho

2,020 systems

SystemServesStatusRules violated, 3 yrUnresolved
Veolia Water Idaho
Ada County 		264,978 0 0
Meridian Water Dept
Ada County 		152,070 0 0
Nampa City of
Canyon County 		100,200 0 0
Caldwell City of
Canyon County 		78,740 1 1
Idaho Falls City of
Bonneville County 		69,450 0 0
Pocatello City of
Pocatello · Bannock County 		58,231 2 0
Twin Falls City of
Twin Falls County 		56,121 5 0
Coeur D Alene City of
Kootenai County 		54,115 0 0
Rexburg City of
Madison County 		40,695 1 0
Kuna City of
Ada County 		32,038 0 0
Moscow Water Dept
Latah County 		26,000 1 0
Falls Water Company INC
Bonneville County 		22,650 3 0
Post Falls City of
Kootenai County 		20,285 0 0
Lewiston Orchards Irrigation Dist
Nez Perce County 		20,000 0 0
Ammon City of
Bonneville County 		17,338 1 0
Chubbuck City of
Bannock County 		15,842 1 1
Lewiston City of
Nez Perce County 		15,001 3 0
Mountain Home, City of
Elmore County 		14,651 5 2
Star Sewer and Water Dist Water System
Ada County 		14,000 1 0
Blackfoot City of
Bingham County 		13,224 2 0
Middleton City of
Canyon County 		13,190 0 0
Jerome City of
Jerome County 		13,135 1 0
Garden City Water and Sewer System
Ada County 		12,500 0 0
Sandpoint Public Works Dept
Bonner County 		12,284 0 0
East Greenacres Irrigation Dist
Kootenai County 		11,165 0 0
Ross Point Water Dist
Kootenai County 		10,473 0 0
Rathdrum City of
Kootenai County 		10,358 2 1
Burley Water Dept
Cassia County 		10,345 2 0
Hayden Lake Irrigation Dist
Kootenai County 		9,375 0 0
Capitol Water Corp
Ada County 		9,000 5 1
Avondale Irrigation Dist
Kootenai County 		8,785 0 0
University of Idaho
Latah County 		8,589 0 0
Payette City of
Payette County 		8,127 1 0
Hailey Water and Sewer
Blaine County 		8,000 1 0
Mountain Home Air Force Base
Elmore County 		7,500 4 0
Fruitland City of
Payette County 		7,458 3 1
Emmett City of
Gem County 		6,700 0 0
Central Shoshone County Water Dist
Shoshone County 		6,455 0 0
Eagle, City of (western Zone)
Ada County 		6,108 2 0
Rupert City of
Minidoka County 		5,796 2 1
Weiser City of
Washington County 		5,630 1 0
Preston City of
Franklin County 		5,591 5 1
Rigby City of
Jefferson County 		5,400 2 0
Kimberly City of
Twin Falls County 		5,359 1 0
American Falls City of
Power County 		4,863 0 0
Buhl City of
Twin Falls County 		4,518 3 0
McCall City of
Valley County 		4,423 5 1
Shelley City of
Bingham County 		4,409 1 0
ST Maries City of
Benewah County 		4,173 0 0
Hillside Service Area
Kootenai County 		4,140 0 0
About this data

Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Idaho records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.