County · Idaho
Ada County, Idaho: drinking water records
This overview covers 16 ZIP codes and 54 community water systems in Ada County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Capitol Water Corp ID4010022 | 9,000 | 240 | 7 | 3 | 0 ppb |
| Veolia Water Idaho ID4010016 | 264,978 | 720 | 0 | 0 | 2 ppb |
| Meridian Water Dept ID4010097 | 147,340 | 1,440 | 2 | 0 | 3.9 ppb |
| Kuna City of ID4010085 | 32,038 | 300 | 0 | 0 | 0 ppb |
| Star Sewer and Water Dist Water System ID4010220 | 14,000 | 240 | 0 | 0 | 1 ppb |
| Garden City Water and Sewer System ID4010066 | 12,500 | 480 | 7 | 0 | 0 ppb |
| Eagle, City of (Western Zone) ID4010222 | 6,108 | 180 | 0 | 0 | 1 ppb |
| Eagle, City of (Eastern Zone) ID4010201 | 3,702 | 120 | 0 | 0 | 6 ppb |
| Idoc Mountain View Transformation Center ID4010255 | 456 | 0 | 0 | 1 | 0 ppb |
| Greenhills Estates 3 ID4010069 | 200 | 0 | 0 | 1 | 2 ppb |
| Eagle Point Community ID4010101 | 150 | 0 | 0 | 1 | 1 ppb |
| Eagle MHC ID4010123 | 135 | 0 | 0 | 1 | 7 ppb |
| Krizview Park ID4010178 | 120 | 0 | 0 | 1 | 3 ppb |
| Bittercreek Meadows Subdivision ID4010200 | 75 | 0 | 0 | 5 | 0 ppb |
| Franklin Domestic Water Users ID4010064 | 75 | 0 | 0 | 4 | 0 ppb |
| Island Village Mobile Home Park ID4010076 | 70 | 0 | 0 | 5 | 3 ppb |
| Willowtree Estates Homeowner Association ID4010253 | 50 | 0 | 0 | 1 | 1 ppb |
| Rivervine Subdivision ID4010245 | 25 | 0 | 0 | 1 | 0 ppb |
| Idoc Sbx Complex ID4010141 | 3,309 | 0 | 0 | 0 | 0 ppb |
| Idoc Idaho State Correctional Center ID4010240 | 2,204 | 0 | 0 | 0 | 0 ppb |
| Dry Creek Water Company LLC ID4010266 | 1,125 | 0 | 0 | 0 | 0 ppb |
| Hillsdale Estates Homeowners Assn ID4010218 | 800 | 0 | 0 | 0 | 0 ppb |
| Desert View Estates Water Corp ID4010042 | 650 | 0 | 0 | 0 | 0 ppb |
| Rustic Acres Mobile Home Park ID4010126 | 540 | 0 | 0 | 0 | 0 ppb |
| City of Eagle - Avimor ID4010272 | 490 | 0 | 0 | 0 | 6 ppb |
ZIP reports in Ada County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.