Mayes County contains 63 EPA-regulated facilities, 4 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 13 TRI chemical reporters. EPA has assessed $91.4k in lifetime penalties and TRI reporters disclosed roughly 6.8M lb of on-site releases. That facility count is well above the Oklahoma state average of 46 per county.
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Pryor Chem Co | Pryor | 3.4M | Penalties |
| Solae Co Llc/Soy Isolate Prod Plt | Pryor | 3.2M | Compliant |
| Grand River Dam Auth/Chouteau Coal Fired Complex | Chouteau | 112.7k | Sig. violation |
| Norit Activated Carbon | Pryor | 39.8k | Compliant |
| American Casting | Pryor | 18.5k | Penalties |
| Pryor Resin Mfg Faclty | Pryor | 10.8k | Compliant |
| Aptus Manufacturing I, Llc | Pryor | 2.3k | Compliant |
| Gap Roofing Co / Saturated Felt Plant | Pryor | 1.7k | Compliant |
| Lone Star Ind Inc Dba Buzzi Unicem Usa Pryor Cement Plant | Pryor | 110 | Sig. violation |
| Rae Corp / Pryor Plant | Pryor | 17 | Penalties |
| Gold Bond Building Products - Pryor | Pryor | 1 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Lone Star Ind Inc Dba Buzzi Unicem Usa Pryor Cement Plant | Pryor | $6.4k | 2025-05-28 |
| Chouteau Pwa | Chouteau | $500 | 2024-10-25 |
| Grand River Dam Auth/Chouteau Coal Fired Complex | Chouteau | $0 | 2025-10-16 |
| Pryor Industrial Conservation | Pryor | $0 | 2025-11-05 |