Washington Oil Tank Removal, Inspection & UST Contractors
Find contractors in Washington for oil tank removal, underground storage tank inspection, fuel tank testing, decommissioning, and remediation.
Washington Oil Tank Removal, Fuel Tank Inspection & UST Contractors
Don't see your company listed?
If you provide oil tank removal, UST inspection, testing, or related services in Washington, request to be added to our directory.
Request to Be Listed →Washington UST regulations are administered by the Washington Department of Ecology. For federal UST requirements, see the EPA Underground Storage Tank Program.
Underground Storage Tanks in Washington
- Active regulated USTs
- 9,625
- Federally regulated tank systems registered as active, as of March 31, 2026
- Closed USTs
- 39,413
- Regulated tank systems closed to date, as of March 31, 2026
- Leaks not yet cleaned up
- 2,506
- Confirmed petroleum releases not yet cleaned up, of 7,253 confirmed to date, as of March 31, 2026
- Homes heated with oil
- 0.9%
- Share of occupied homes whose main heating fuel is fuel oil, kerosene or similar, 2024 estimate
Home heating oil tanks are exempt from the federal UST rules and are not in the EPA counts.
Sources: EPA, UST Performance Measures, Mid-Year FY 2026; U.S. Census Bureau, American Community Survey 2024 1-year estimates, table B25040 (House Heating Fuel).
Common Questions About UST Contractors in Washington
Does Washington require a licensed UST contractor?
Yes. Washington requires contractors performing regulated underground storage tank work to hold a credential issued by the Washington State Department of Ecology.
Who regulates underground storage tanks in Washington?
The Washington Department of Ecology oversees underground storage tank regulations in Washington. Federal requirements come from the EPA underground storage tank program.
How do I verify a UST contractor's credentials in Washington?
Ask the contractor for their credential number and confirm it directly with the Washington State Department of Ecology. Also ask for proof of insurance appropriate for tank work.