Okanogan County contains 123 EPA-regulated facilities, 22 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 1 TRI chemical reporters. EPA has assessed $5.3M in lifetime penalties and TRI reporters disclosed roughly 0 lb of on-site releases. That facility count is near the Washington state average of 152 per county.
| Facility | City | On-site (lb) | Status |
|---|
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Columbia River Carbonate Janis Rail | Tonasket | $0 | 2025-04-29 |
| Chelan Fruit Cooperative Pateros So | Pateros | $0 | 2024-10-23 |
| Whitcomb Avenue | Tonasket | $0 | |
| Pacific Calcium | Riverside | $0 | 2025-04-30 |
| Cascade Concrete Prod North Pit | Winthrop | $0 | 2021-09-16 |
| North End Sr 20 Pedestrian-Bike Path | Twisp | $0 | |
| Pearrygin Lake State Park 2 | Winthrop | $0 | |
| Okanogan Co Public Works Midland Pu | Okanogan | $0 | |
| Brewster Wastewater System Improvements | Brewster | $0 | |
| Buckhorn Mountain Mine | Oroville | $0 | 2025-10-20 |
| Bodie/Toroda Creek | Wauconda | $0 | |
| Tollefson Construction Inc Airport | Omak | $0 | 2021-09-14 |
| Columbia River Carbonate Wauconda Quarry | Wauconda | $0 | 2021-11-03 |
| Seatons Grove | Nespelem | $0 | |
| Riversmeet | Winthrop | $0 | 2025-05-15 |
| Julia Maley Park Well Treatment | Omak | $0 | 2024-07-10 |
| Zosel Lumber Co | Oroville | $0 | 2025-09-03 |
| Goudy Pit | Winthrop | $0 | 2025-09-04 |
| Boesel Construction Inc Indian Dan Canyon | Brewster | $0 | 2021-11-02 |
| Christian Anker, Inc Pateros Pit | Pateros | $0 | 2021-11-02 |
| Granite Northwest Engh Rd Pit | Omak | $0 | 2021-09-14 |
| Central Ferry Packing | Pateros | $0 | 2024-10-23 |