Data / Environmental compliance / Wyoming / Sinclair Oil Corp., Casper, Wyoming Refinery
Sinclair Oil Corp., Casper, Wyoming, WY: 12 quarters
Updated November 7, 2026. Source: US EPA, Enforcement and Compliance History Online (ECHO).
EPA's ECHO database records 12 inspections at Sinclair Oil Corp., Casper, Wyoming Refinery, 5700 East Hwy 20-26, Casper, WY 82609, in the five years to November 1, 2026. No penalty is recorded in that period. The facility was in significant noncompliance in 12 of the last 12 quarters.
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- Site
- 5700 East Hwy 20-26, Casper, WY 82609
- EPA registry ID (FRS)
- 110011942719
- Industry
- 32411 Petroleum Refineries; 324110 Petroleum Refineries
- County
- Natrona
- Programs
- Clean Air Act, Clean Water Act, Hazardous waste (RCRA)
- Compliance status
- Significant Violation
- Inspections
- 12, latest September 10, 2026
- Formal actions
- None in five years; latest on record June 13, 2018
- Informal actions
- None in five years; latest on record July 5, 2016
- Penalties
- None recorded in five years
- ECHO facility report
- echo.epa.gov
By program
Inspections, enforcement actions and penalties of the last five years in each EPA program that covers the facility, as the program systems record them. Federal case penalties are listed under federal enforcement cases. Quarters count the last 12.
| Program | Inspections | Informal actions | Formal actions | Penalties | Latest penalty | Latest amount | Quarters with violations | Quarters in significant noncompliance | Status |
|---|---|---|---|---|---|---|---|---|---|
| Clean Air Act | 3 | 0 | 0 | $0 | $31,500 | 12 | 12 | Violation Addressed; State Has Lead Enforcement | |
| Clean Water Act | 4 | 0 | 0 | $0 | $0 | 0 | 0 | Not Applicable | |
| Hazardous waste (RCRA) | 5 | 0 | 0 | $0 | $12,000 | 0 | 0 | No Violation Identified |
EPA inspections and evaluations
Compliance monitoring EPA itself carried out, newest first. State inspections are counted above, with the date of the latest.
| Date | Activity | Type | Law |
|---|---|---|---|
| May 6, 2026 | Inspection/Evaluation | Evaluation | Clean Water Act |
| May 6, 2026 | Inspection/Evaluation | Evaluation | Clean Water Act |
| May 6, 2026 | Inspection/Evaluation | Evaluation | Clean Water Act |
| August 6, 2024 | Inspection/Evaluation | Evaluation | Resource Conservation and Recovery Act |
Also on SpecStream
Public domain (U.S. government work). Counts and penalties cover the five years to November 1, 2026 as ECHO publishes them in its exporter and case downloads, drawn from EPA's air, water, hazardous waste and drinking water systems and from the states that report to them. Records can be incomplete, late or corrected after this page was read. A federal case penalty that names several facilities is shown on each of them and counted once in industry, state and national totals. Each row links to EPA's own report. A quarter in significant noncompliance is EPA's term for a serious violation status in a program, not a finding of fault beyond that status. This page uses US EPA data and is not endorsed or certified by the US EPA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.