All 50 States
Find a Certified Radon Mitigator
Select your state to view NRPP and NRSB certified mitigators near you — mitigators only, no testers.
EPA Zone 1 — High-Radon States
Average indoor radon above 4 pCi/L
CO
Colorado
CT
Connecticut
ID
Idaho
IL
Illinois
IN
Indiana
IA
Iowa
KS
Kansas
KY
Kentucky
ME
Maine
MD
Maryland
MA
Massachusetts
MI
Michigan
MN
Minnesota
MO
Missouri
MT
Montana
NE
Nebraska
NH
New Hampshire
NJ
New Jersey
NY
New York
ND
North Dakota
OH
Ohio
PA
Pennsylvania
RI
Rhode Island
SD
South Dakota
UT
Utah
VT
Vermont
VA
Virginia
WV
West Virginia
WI
Wisconsin
WY
Wyoming
All Other States
Still possible to have elevated radon — always test first
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