Water quality for ZIP code 83720
ZIP 83720 covers Boise City in Ada County, Idaho, one of 16 ZIP codes in the county. 86 active public water systems serve the county; 46 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Ada County
52 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Meridian Water Dept |
152,070 | 0 | |
| Kuna City of |
32,038 | 0 | |
| Star Sewer and Water Dist Water System |
14,000 | 1 | |
| Garden City Water and Sewer System |
12,500 | 0 | |
| Capitol Water Corp |
9,000 | 5 | |
| Eagle, City of (western Zone) |
6,108 | 2 | |
| Eagle, City of (eastern Zone) |
3,702 | 0 | |
| Idoc Sbx Complex |
3,309 | 2 | |
| Idoc Idaho State Correctional Center |
2,204 | 3 | |
| Dry Creek Water Company LLC |
1,658 | 1 | |
| Hillsdale Estates Homeowners Assn |
800 | 0 | |
| Desert View Estates Water Corp |
650 | 0 | |
| Rustic Acres Mobile Home Park |
540 | 3 | |
| City of Eagle Avimor |
490 | 0 | |
| City of Eagle Valnova |
490 | 0 | |
| Idoc Mountain View Transformation Center |
456 | 4 | |
| Flying H Trailer Ranch |
430 | 0 | |
| Eagle Glen Homeowners Assn INC |
300 | 0 | |
| Wymosa Water Assn INC |
280 | 0 | |
| Paradise Estates Water Corp |
273 | 4 | |
| West Meadows Estates |
270 | 0 | |
| Arrowrock Ranch |
250 | 0 | |
| Greenhills Estates 3 |
200 | 0 | |
| Klugherz Water Corp |
200 | 0 | |
| Eagle Meadows MHP |
195 | 0 |
Non-community systems in Ada County (33: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Ada County, the county this ZIP code lies in, largest first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
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.