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The District of Columbia does not require certification for performing radon services.
However, it is recommended that you become certified and the state recognizes NRPP or NRSB certification. If you do become certified, it is recommended that you contact the state radon contact to let them know you are certified. Many non-regulated states will recognize and list certified individuals.
- District Department of the Environment – http://doee.dc.gov/service/radon
Washington D.C. Radon Fact Sheet
