Marathon County contains 127 EPA-regulated facilities, 11 of which are currently flagged for significant noncompliance. The county also hosts 4 Superfund sites and 34 TRI chemical reporters. EPA has assessed $5.7M in lifetime penalties and TRI reporters disclosed roughly 3.0M lb of on-site releases. That facility count is well above the Wisconsin state average of 59 per county.
| Site | City | Status |
|---|---|---|
| Wausau Ground Water Contamination | Wausau | Construction complete |
| Spickler Landfill | Spencer | Ready for anticipated reuse |
| Unity Auto Mart | Unity | Listed on NPL |
| Mid State Disposal Inc Landfill | Cleveland Township | Ready for anticipated reuse |
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Mullins Cheese Factory-300 | Mosinee | 1.6M | Sig. violation |
| Weston | Kronenwetter | 524.6k | Compliant |
| Mullins Cheese Inc | Marshfield | 429.8k | Compliant |
| Ahlstrom Mosinee Llc | Mosinee | 320.5k | Sig. violation |
| 3m Wausau - Greystone Plant | Wausau | 68.8k | Sig. violation |
| Domtar Corp | Rothschild | 40.6k | Compliant |
| Crystal Finishing Systems Inc | Schofield | 14.2k | Sig. violation |
| Apogee Wausau Group Inc Linetec Division | Wausau | 10.6k | Compliant |
| Sne Enterprises Inc | Mosinee | 4.1k | Compliant |
| Gpi Corp | Schofield | 3.9k | Compliant |
| Borregaard Usa Inc | Rothschild | 3.5k | Compliant |
| Pdm Bridge Llc | Wausau | 1.2k | Compliant |
| Wausau Chemical Corporation | Wausau | 825 | Penalties |
| Kerry Rothschild | Rothschild | 210 | Sig. violation |
| Rbc Manufacturing Corp | Wausau | 59 | Compliant |
| Woods Equipment Company - Cf Division | Kronenwetter | 51 | Compliant |
| Norlen Inc. | Schofield | 40 | Compliant |
| Greenheck Fan | Schofield | 38 | Compliant |
| 3m Co - Wausau Downtown | Wausau | 31 | Sig. violation |
| Imperial Industries Inc | Rothschild | 20 | Compliant |
| A&b Process Systems | Stratford | 11 | Compliant |
| Ramrod Industries Llc | Spencer | 7 | Compliant |
| Merrill Iron & Steel Inc | Schofield | 5 | Compliant |
| Greenheck Fan Corp | Schofield | 3 | Compliant |
| Colby Metal Inc | Colby | 2 | Compliant |
| Pco Urethane | Marshfield | 2 | Compliant |
| Greenheck Corp. Mosinee | Mosinee | 1 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Crystal Finishing Systems Inc | Schofield | $350.0k | 2024-08-14 |
| Marth Wood Shavings Supply Inc | Marathon | $0 | 2025-03-26 |
| 3m Co - Wausau Downtown | Wausau | $0 | 2026-02-23 |
| Deer Trail Village | Mosinee | $0 | |
| Linetec Anodize | Wausau | $0 | 2024-06-17 |
| Kerry Rothschild | Rothschild | $0 | 2024-04-22 |
| Crystal Finishing Systems Inc - Mosinee | Mosinee | $0 | 2020-12-10 |
| Ahlstrom Mosinee Llc | Mosinee | $0 | 2025-09-17 |
| Mullins Cheese Factory-300 | Mosinee | $0 | 2024-04-18 |
| We Energies Rothschild Biomass Cogeneration Facility | Rothschild | $0 | 2023-10-23 |
| 3m Wausau - Greystone Plant | Wausau | $0 | 2025-12-04 |