Ada County contains 389 EPA-regulated facilities, 10 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 17 TRI chemical reporters. EPA has assessed $18.0M in lifetime penalties and TRI reporters disclosed roughly 221.6k lb of on-site releases. That facility count is well above the Idaho state average of 48 per county.
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Micron Technology, Inc. | Boise | 109.5k | Compliant |
| Cs Beef Packers | Kuna | 80.1k | Penalties |
| Army National Guard Orchard Combat Training Center Ranges | Boise | 25.2k | Compliant |
| Marathon Pipe Line Boise Terminal | Boise | 3.7k | Compliant |
| Idaho Materials And Construction | Eagle | 1.7k | Compliant |
| Idaho Concrete Company | Boise | 1.5k | Compliant |
| Knife River Mountain West | Boise | 58 | Compliant |
| Darigold Boise | Boise | 35 | Compliant |
| The Azek Company | Boise | 10 | Compliant |
| Computrol | Meridian | 1 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Kirsten Subdivision No. 1 | Boise | $7.4k | 2024-04-04 |
| Nicholson | Kuna | $0 | |
| Western Aircraft | Boise | $0 | 2007-12-20 |
| Capitol Water Corporation | Boise | $0 | |
| Mace 1, Llc | Eagle | $0 | 2025-10-09 |
| Bittercreek Meadows Subdivision Well | Meridian | $0 | |
| West Boise Wwtp | Garden City | $0 | 2025-08-14 |
| Eagle Island State Park | Eagle | $0 | 2024-02-23 |
| Albertsons Companies Inc. (Aci) Boise Air Terminal | Boise | $0 | |
| Idaho State Correctional Center | Kuna | $0 |