California
Radon Professionals in California
Find NRPP-certified radon testing and mitigation professionals across California. Browse by city to see professionals in your area. California requires radon disclosure during real estate transactions.
Browse by City
Select your city to see certified radon professionals in your area.
Aliso Viejo
1
Altadena
1
Anaheim
2
Antelope
1
Apple Valley
1
Auburn
1
Berkeley
1
Beverly Hills
1
Bonita
1
Bonsall
1
Calimesa
1
Chatsworth
1
Chico
1
Chino
1
Chino Hills
1
Chula Vista
8
Citrus Heights
2
Clayton
1
Clovis
1
Concord
2
Corona
1
Danville
1
Davis
1
Diamond Springs
1
Dublin
1
El Dorado Hills
1
El Segundo
1
Elk Grove
1
Encinitas
1
Encino
1
Escondido
1
Fresno
2
Garden Grove
2
Gardena
1
Grass Valley
1
Hayward
2
Huntington Beach
2
Inglewood
1
Irvine
4
Ladera Ranch
1
Lancaster
1
Lompoc
1
Long Beach
5
Los Angeles
5
Madera
1
Markleeville
2
Menifee
1
Mission Viejo
1
Monterey
1
Moorpark
2
Newhall
1
Oakland
5
Orange
9
Paramount
1
Pasadena
1
Redlands
1
Redondo Beach
1
Rialto
1
Riverside
1
Roseville
8
Sacramento
1
San Diego
5
San Francisco
1
San Jose
4
San Leandro
3
San Pedro
1
Santa Barbara
2
Santa Monica
2
Seal Beach
1
Sebastopol
1
Signal Hill
1
Somis
1
South Lake Tahoe
1
Stockton
1
Studio City
1
Tahoe City
2
Thousand Oaks
3
Torrance
1
Tustin
1
Valencia
1
Ventura
1
Vista
1
Watsonville
1
Woodland Hills
1
Yorba Linda
1
Radon Services in California
California has 145 NRPP-certified radon professionals in our directory across 85 cities. 18 are certified for radon mitigation system installation. 131 hold radon testing certifications.
All professionals listed are certified through the National Radon Proficiency Program (NRPP), which is administered by AARST. NRPP certification requires passing a national exam, maintaining continuing education, and following strict quality assurance protocols.