Columbia County contains 67 EPA-regulated facilities, 6 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 14 TRI chemical reporters. EPA has assessed $1.1M in lifetime penalties and TRI reporters disclosed roughly 189.7k lb of on-site releases. That facility count is near the Wisconsin state average of 59 per county.
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Alliant Energy - Wpl - Columbia Energy Center | Pardeeville | 158.1k | Compliant |
| United Wisconsin Grain Producers | Friesland | 18.5k | Compliant |
| Didion Ethanol, Llc | Cambria | 7.0k | Compliant |
| Encapsys Llc | Portage | 4.3k | Compliant |
| Fall River Foundry Co | Fall River | 904 | Compliant |
| American Packaging Corp | Columbus | 511 | Compliant |
| Innocor Foam Technologies - Acp, Inc. | Portage | 160 | Compliant |
| Cardinal Fg | Portage | 141 | Compliant |
| Everbrite Llc | Pardeeville | 119 | Compliant |
| Grande Cheese Co Wyocena | Wyocena | 11 | Compliant |
| Ek Machine Co Inc | Fall River | 10 | Compliant |
| Metalcraft Of Mayville - Fall River | Fall River | 1 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Didion Milling Inc | Cambria | $1.1M | 2025-08-08 |
| Petro Travel Plaza #403 | Portage | $0 | 2026-01-06 |
| Randolph Water Dept | Randolph | $0 | 2008-06-03 |
| Portage Wastewater Treatment Facility | Portage | $0 | 2025-09-17 |
| Poynette Mobile Estates | Poynette | $0 | |
| Cambria Wastewater Treatment Facility | Cambria | $0 | 2018-01-03 |