Tapcensus

Idaho

Ada County drinking water quality

86 active public water systems serve 516,682 people in Ada County. 40 are compliant, 46 had at least one EPA violation in the past three years, 2 are designated serious violators, and 1 carries a health flag.

Active systems 86 53 community systems
People served 517K by public water systems
Systems with violations 46 53% of active systems, past 3 years
Serious violators 2 1 systems carry a health flag

Needs attention

Stanley Pond INC ID4010139 · Community water system · Serves 72 4 rules violated in the past three years. Unresolved: Arsenic, Groundwater Rule (GWR), and Public Notification Rule.
Anderson Circle Water Corp ID4010005 · Community water system · Serves 40 1 rule violated in the past three years. Unresolved: Nitrate.
Legacy Market 1 ID4010274 · Transient non-community system · Serves 100 1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule (RTCR).

Community water systems

53 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Veolia Water Idaho
 264,978 0 0
Meridian Water Dept
 152,070 0 0
Kuna City of
 32,038 0 0
Star Sewer and Water Dist Water System
 14,000 1 0
Garden City Water and Sewer System
 12,500 0 0
Capitol Water Corp
 9,000 5 1
Eagle, City of (western Zone)
 6,108 2 0
Eagle, City of (eastern Zone)
 3,702 0 0
Idoc Sbx Complex
 3,309 2 2
Idoc Idaho State Correctional Center
 2,204 3 1
Dry Creek Water Company LLC
 1,658 1 1
Hillsdale Estates Homeowners Assn
 800 0 0
Desert View Estates Water Corp
 650 0 0
Rustic Acres Mobile Home Park
 540 3 2
City of Eagle Avimor
 490 0 0
City of Eagle Valnova
 490 0 0
Idoc Mountain View Transformation Center
 456 4 1
Flying H Trailer Ranch
 430 0 0
Eagle Glen Homeowners Assn INC
 300 0 0
Wymosa Water Assn INC
 280 0 0
Paradise Estates Water Corp
 273 4 1
West Meadows Estates
 270 0 0
Arrowrock Ranch
 250 0 0
Greenhills Estates 3
 200 0 0
Klugherz Water Corp
 200 0 0
Eagle Meadows MHP
 195 0 0
Eagle Point Community
 150 1 0
Evans Water Corp
 137 1 0
Eagle MHC
 135 2 0
Linda Vista Mobile Home Park
 125 2 2
Krizview Park
 120 2 1
Chaparral Water Assn
 100 1 1
Willowbrook Estates Property Owners
 100 1 1
Eagle West Subd Water Assn
 92 0 0
Terrace Water Corp INC
 84 0 0
Bittercreek Meadows Subdivision
 75 5 2
Franklin Domestic Water Users
 75 3 0
Stanley Pond INC
 72 4 2
Grouse Point Water Company LLC
 70 0 0
Island Village Mobile Home Park
 70 2 0
Malad and Hilton Water Company Inc.
 70 0 0
Sierra Water Corp
 70 0 0
North Hills Mobile Village
 63 0 0
HI View Water
 55 2 1
Willowtree Estates Homeowner Association
 50 0 0
Forrey Heights
 49 1 0
Amy Trailer Park
 46 1 1
Scottys Mobile Home Park
 42 2 1
Anderson Circle Water Corp
 40 1 0
Rim Acres Mutual Water
 31 0 0
Non-community systems (33: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Idpr Lucky Peak SP Discovery Unit
 1,000 4 0
CS Beef Packing
 850 1 0
Lds Church Amity Locust Grove
Meridian 		840 2 0
Idpr Lucky Peak SP Sandy Point
 777 2 1
Idaho National Guard Ortc Facility
 600 2 1
Lds Church Eagle #21
Eagle 		300 2 0
Lds Church Kuna Blackcat
 300 2 1
Lds South Maple Grove Stake Center
Boise 		300 3 1
Pueblo Lindo Eagle
 300 0 0
Idaho National Guard Snake River Train
 250 0 0
NW Lineman College
Meridian 		250 0 0
Ttb Brumpton
 250 0 0
Hilltop Community Church
 220 2 0
Bodacious Pig Bbq
 100 0 0
Boise Stage Stop
 100 3 2
Kuna East
 100 0 0
Legacy Market 1
 100 1 1
Bme Fire Trucks
 74 0 0
Small Wonders Daycare
Kuna 		74 0 0
Boise Gun Club
 50 1 0
Cloverdale Montessori School
 50 1 0
Dar Pro Solutions
Kuna 		50 1 0
Idaho National Guard Range Center of O&m
 50 0 0
Shadow Valley Golf Course
 50 0 0
Idaho Concrete Company
 45 0 0
Boise Police Department Shooting Range
 30 0 0
Gran del Acres
 25 0 0
Hilltop Station
 25 0 0
Indian Creek Winery
Kuna 		25 2 2
Itd Blacks Creek Rest Area
 25 4 1
Itd East Boise Port of Entry
 25 0 0
Star Saloon
 25 1 0
Swan Falls Public Water Idaho Power
 25 1 0
Inactive systems (224, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

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.