Sinclair Oil Corp. - Casper, Wyoming Refinery
5700 East Hwy 20-26, Casper, WY 82609, Natrona County
A manufacturing facility in Casper, Wyoming, listed in EPA records under petroleum refineries (NAICS 324110). It is one of 205 active manufacturing facilities in EPA records in Wyoming, 27 of them in Casper.
- Industry
- Petroleum and coal products
- NAICS 324
- TRI reporter
- Yes
- Inspections, 5 yr
- 12
- EPA registry ID
- 110011942719
- Revised
- November 1, 2026
What's made here
- Petroleum Refineries (NAICS 324110)
Public EPA records
| Toxics Release Inventory | Reports to the TRI (facility ID 82609LTTLM5700E). |
|---|---|
| Clean Air Act | Listed as a major source of air emissions. |
| Clean Water Act | A non-major water discharge permit (NPDES). |
| Hazardous waste (RCRA) | Listed as a large quantity generator of hazardous waste (1,000 kg or more a month); and an operating hazardous waste treatment, storage or disposal facility. |
| Greenhouse gas reporting | Reports to the Greenhouse Gas Reporting Program. |
| Inspections | 12 in the last five years; most recent September 10, 2026. |
EPA ECHO, November 1, 2026; not a rating. EPA report ยท About these records