Washington, DC Radon Mitigation and Testing

Q: What EPA Radon Zone is Washington in?

Washington is in District of Columbia County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Washington?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

District of Columbia County

EPA Zone Unknown

The nation's capital in the District of Columbia shows an average radon level of 4.0 pCi/L based on limited testing data. This reading sits right at the EPA action threshold, making testing particularly important for residents in zip code 20010 and throughout the metro area. The district's diverse housing stock, from historic rowhouses to modern high-rises, creates varied radon conditions that require individual property assessment.

Washington, DC Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Washington, DC Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Washington, Washington DC Radon Levels

User-submitted radon test readings from homes in the Washington area.

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Washington, DC	21-50 Years	No Basement/All Slab	Jan 2018

Have a radon test result for Washington? Submit your reading to help other homeowners.

Washington Radon Facts

Key details about the radon risk profile for Washington and the 20010 zip code area.

EPA Radon Zone

Unknown

County

District of Columbia County, DC

Zip Code

20010

Predicted Screening Level

Unknown

Washington and the 20010 zip code are located in District of Columbia County, which has an EPA assigned Radon Zone of Unknown. A radon zone of Unknown does not have sufficient data for classification. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Washington, DC

What EPA Radon Zone is Washington in?

Washington and the 20010 zip code are in District of Columbia County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

How much does radon mitigation cost in Washington?

Radon mitigation in Washington typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Washington?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.