Washington, DC Radon Levels
Check local Washington radon levels and find certified testing and mitigation professionals to keep your home safe
Washington, DC Radon Facts
EPA Radon Zone
Unknown
Unknown
County
District of Columbia County, DC
Zip Code
20010
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.
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Washington, DC Radon Levels
User-submitted radon test readings from homes in the Washington area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Washington, DC | 21-50 Years | No Basement/All Slab |
Have a radon test result for Washington? Submit your reading to help other homeowners.
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.