South Dakota Department of Agriculture and Natural Resources
South Dakota radon (air)
No state license roster to republish. Updated 2026-09-04 (US/Pacific).
If you are not sure you need a pro yet, see when a DIY radon test kit is enough or how to test a home for radon.
South Dakota does not issue a state radon license and does not publish a public statewide list of measurement or mitigation businesses. This page does not invent company names, phones, licenses, or addresses to fill that gap.
DANR’s official radon page points homeowners to nationally certified providers instead: look up residential measurement or mitigation service providers through NRPP or NRSB (the same links DANR publishes). Always re-check the credential before hiring.
What DANR says homeowners can do
- Eastern South Dakota is EPA Zone 1 (higher predicted potential); the rest of the state is Zone 2. DANR notes there are no Zone 3 areas. Zone maps are not a substitute for a home test.
- EPA’s long-term action level remains 4 pCi/L. The only way to know a building’s level is to test indoor air.
- DANR has offered free short-term kits to South Dakota residents (limited supply). Request through the form linked from the DANR radon page: states.aelabs.com/#/sd.
- Questions: DANR Radon Information Line 1-800-438-3367.
Official sources
- South Dakota DANR — Air Quality Radon (retrieved 2026-09-04)
- NRPP Find a Pro (linked from DANR for measurement and mitigation)
- NRSB find a professional (linked from DANR for measurement and mitigation)
- U.S. EPA Radon (linked from DANR)
This index does not rank contractors or take referral fees. No Amazon kit links on this state page.