Authoritative resources · Vetted Colorado-specific sources
Colorado Radon Resources — Authoritative Directory
Vetted directory of the most authoritative US and Colorado-specific radon resources: federal agency guidance, state program contacts, certification verification systems, university research, and homeowner + healthcare provider materials. Every listing below is independently maintained by the named authority — links open in a new tab so you can verify against the source directly.
Federal & international authorities
Federal Agencies + International Bodies
- US Environmental Protection Agency (EPA) Radon Program — Foundational US radon guidance, action level (4 pCi/L), and consumer publications. epa.gov/radon
- EPA A Citizen's Guide to Radon (EPA 402/K-12/002, 16 pp.) — Free PDF, the primary consumer reference. epa.gov citizen's guide
- EPA Home Buyer's and Seller's Guide to Radon (EPA 402/K-13/002) — Real-estate-transaction-specific. epa.gov buyer/seller guide
- EPA Radon Map of EPA Zones — Predictive radon zone classifications (Zone 1 highest predicted, Zone 3 lowest) by county. epa.gov radon zones
- US Surgeon General Health Advisory on Radon — 2005 official health advisory recommending all US homes be tested. epa.gov health risk
- World Health Organization (WHO) Handbook on Indoor Radon (2009) — International clinical reference, 2.7 pCi/L WHO action level. who.int handbook
- US National Cancer Institute — Radon and Cancer Fact Sheet — NCI clinical reference. cancer.gov radon
- HUD Healthy Homes Program — federal multifamily housing radon guidance. hud.gov healthy homes
Colorado state authorities
Colorado State Agencies + Programs
- Colorado Department of Public Health and Environment (CDPHE) — Radon Program — State radon program lead. Maintains certified mitigator list, school testing oversight, and public outreach. 303-692-3442 · cdphe.colorado.gov/radon
- Colorado SB 23-206 — Residential Real Estate Disclosure — Statutory disclosure obligation for known radon results. leg.colorado.gov SB 23-206
- Colorado Radon Professionals (DORA) — State licensing program for radon measurement and mitigation professionals. dpo.colorado.gov
- Colorado DORA Radon Program Rules — Rules for radon professional licensing in Colorado. dpo.colorado.gov
- American Lung Association in Colorado — Statewide cancer prevention coalition; partners with ALA Colorado on radon awareness. lung.org/colorado
- Colorado Department of Education — School Radon Testing Records — Public-records requests for school testing data filed under Colorado school radon testing law. cde.state.co.us
Industry standards + certification
Industry Standards, Certification, and Professional Bodies
- AARST (American Association of Radon Scientists and Technologists) — Industry standards body. Publishes AARST-ANSI installation + measurement standards. aarst.org
- NRPP (National Radon Proficiency Program) — Primary US individual + corporate certification. Colorado requires NRPP or NRSB national cert in addition to CDPHE state registration. nrpp.info
- NRSB (National Radon Safety Board) — Alternative US individual certification accepted by CDPHE. nrsb.org
- AARST find-a-pro directory — Search AARST-member certified pros by ZIP. aarst-nrpp.com find-a-pro
- AARST-ANSI MS-PC 2014 — Measurement protocol standard for radon-in-air testing. Reference for understanding what defensible test methodology requires.
- AARST-ANSI SGM-SF 2017 — Soil gas mitigation standard for single-family residential active sub-slab depressurization systems. Reference for understanding what a code-compliant install looks like.
Medical + health authorities
Medical Authorities + Patient Education
- American Lung Association (ALA) — Radon — Most-cited US patient + clinical authority. Healthcare Provider Decision Support Tool (2024). lung.org/radon
- ALA Colorado Chapter — Colorado-specific advocacy + community resources. lung.org/ia
- American Cancer Society — Radon — Patient-facing cancer-risk framing. cancer.org radon
- CDC Radon Topic Hub — Centers for Disease Control radon overview. cdc.gov/radon
- USPSTF Lung Cancer Screening Recommendations (2021) — Low-dose CT screening criteria. Note: radon exposure is not currently a USPSTF screening trigger but is referenced by some pulmonology societies for shared decision-making in elevated-exposure never-smokers. uspstf lung cancer screening
- Colorado Radon Experts For Healthcare Providers page — Colorado-specific HCP framework, screening guidance, ICD-coding context, patient handouts. coloradoradonexperts.com/providers
Research + academic sources
University Research and Peer-Reviewed Sources
- University of Colorado College of Public Health — Colorado Radon Lung Cancer Study — One of the largest US case-control studies linking residential radon to lung cancer outcomes. public-health.uiowa.edu
- Colorado Department of Public Health and Environment (CDPHE) — Colorado radon data + county tracking. cdphe.colorado.gov/radon
- EPA State Indoor Radon Survey (SIRS, 1993) — Foundational federal state-level radon dataset establishing state rankings (Iowa ranks #1; Colorado is among the highest). Citation: U.S. EPA, "National Residential Radon Survey: Summary Report" (EPA 402/R-92/011).
- BEIR VI Report — Health Effects of Exposure to Indoor Radon — National Academy of Sciences, 1999. Definitive US assessment of radon-lung-cancer dose-response. nap.edu BEIR VI
- WHO Handbook on Indoor Radon (2009) — International epidemiology + clinical synthesis. who.int handbook
Authority resource FAQ
Common Colorado Radon Resource Questions
Frequently Asked Questions
Where can I download the EPA radon guide for free?
The EPA "A Citizen's Guide to Radon" (EPA 402/K-12/002) is published free at epa.gov/radon. It is the foundational US consumer guide to indoor radon — covering health effects, testing methods, mitigation options, and the EPA action level. Spanish-language version also available at the same URL. The companion document, "Home Buyer's and Seller's Guide to Radon" (EPA 402/K-13/002), addresses real-estate-transaction-specific guidance.
How do I verify a Colorado radon contractor's NRPP certification?
Search the National Radon Proficiency Program directory at nrpp.info — enter the contractor's name or NRPP certification number to see active credentials, certification type (measurement vs mitigation), and expiration date. NRPP certifications expire every 2 years; verify the contractor's cert is current before scheduling work. For Colorado-specific dual-credential verification, also check the CDPHE Radon Program registration list.
How do I verify a Colorado radon contractor's CDPHE state registration?
Colorado requires both NRPP/NRSB national certification AND Colorado Department of Public Health and Environment (CDPHE) state registration for any radon mitigation work in Colorado. Call the CDPHE Radon Program at 303-692-3442 to verify a specific contractor's state registration, or request the current list of registered Colorado mitigators. Colorado Radon Experts verifies both credentials independently before routing leads to any partner contractor.
Where can I find Colorado school radon test results?
Colorado law requires all schools to test occupied ground-contact spaces every 5 years. Test results are filed with the Colorado Department of Education and CDPHE. Public-records requests for specific school results can be submitted through the Colorado Department of Education or directly through the school district. Aggregate Colorado school radon data is published in academic literature, notably by the University of Colorado College of Public Health.
What Colorado universities or institutions conduct radon research?
Colorado-specific radon data and research are published by the Colorado Department of Public Health and Environment (CDPHE) and the Colorado Environmental Public Health Tracking program, with academic public-health work from the Colorado School of Public Health. These maintain publicly accessible radon data and publications.
Is residential radon testing covered by Colorado Medicaid?
No. Residential radon test kits and professional mitigation are NOT covered by Colorado Medicaid, Colorado Medicare, or any major commercial health insurance carrier in 2026. Radon is classified as an environmental hazard rather than a medical service. Self-pay test kits cost $15-30 (hardware store, ALA, or CDPHE); professional mitigation $1,000-$2,800. Some Energy Efficient Mortgage (EEM) products allow mitigation cost to be financed into a home loan.
Need to act on a radon test result?
Colorado Radon Experts routes Colorado homeowners to NRPP-certified + Colorado DORA-licensed partner contractors. Free quote within 24 hours · $1,000-$2,800 typical install.