Radon Mitigation in California
87 verified radon specialists across 61 cities in California.
Informational only. This page helps you find certified professionals.
It is not medical, legal, or structural safety advice. For any health or safety hazard, consult a
certified/licensed expert. See our verification methodology.
Cities in California
Select a city to view local radon specialists and pricing.
San Jose 5 pros Orange Limited listings 4 pros Chula Vista Limited listings 4 pros Oakland Limited listings 3 pros Irvine Limited listings 3 pros Los Angeles Limited listings 3 pros San Diego Limited listings 3 pros Somis Limited listings 3 pros Thousand Oaks 2 pros Santa Monica 2 pros Tustin 2 pros Citrus Heights 2 pros South Lake Tahoe 2 pros Long Beach 2 pros Altadena 1 pro Sebastopol 1 pro Lompoc 1 pro Danville 1 pro Seal Beach 1 pro Grass Valley 1 pro Riverside 1 pro Encinitas 1 pro Garden Grove 1 pro Moorpark 1 pro Mission Viejo 1 pro Aliso Viejo 1 pro Stockton 1 pro Redlands 1 pro Studio City 1 pro Lancaster 1 pro Elk Grove 1 pro El Segundo 1 pro Yorba Linda 1 pro Inglewood 1 pro Calimesa 1 pro Bonita 1 pro Encino 1 pro Markleeville 1 pro Fairfield 1 pro Simi Valley 1 pro Newhall 1 pro Chico 1 pro San Bernardino 1 pro Huntington Beach 1 pro Menifee 1 pro Ventura 1 pro Vista 1 pro Pasadena 1 pro North Hollywood 1 pro Chino Hills 1 pro Santa Barbara 1 pro Hayward 1 pro Clovis 1 pro Hemet 1 pro San Leandro 1 pro Roseville 1 pro Chino 1 pro Walnut Creek 1 pro Tahoe City 1 pro San Francisco 1 pro Berkeley 1 pro
Radon Mitigation FAQ
- What radon level requires mitigation?
- The EPA action level is 4.0 pCi/L. Mitigation is recommended at or above this; consider it between 2–4 pCi/L.
- How much does radon mitigation cost?
- Most residential systems run $800–$2,500, depending on home size, foundation type, and radon level.
- Should the contractor be NRPP-certified?
- Yes. NRPP or NRSB certification verifies the contractor is trained and tested to AARST standards. Every provider here is listed with their credential.
Other safety services in California
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