RadonZoneReport is a small independent publishing project that converts US EPA Map of Radon Zones data, AARST mitigation standards, and state-level radon screening surveys into a 6-page county-specific PDF dossier for homeowners. We sell one product: that $15 PDF.
Who builds this
RadonZoneReport is operated by an independent research team — writers, data engineers, and a part-time editorial reviewer with a background in environmental data publishing. We are not health physicists. We are not certified radon professionals. We are not lawyers, doctors, real estate agents, or licensed home inspectors. What we are is competent at reading federal radon documents end-to-end and turning their contents into something a homeowner can hand to a contractor without having to interpret an EPA appendix table at the kitchen table.
Every report we publish is built from primary sources we name on the page. Where we make a derived calculation (for example, the per-county likelihood that an individual home tests above 4 pCi/L), we describe the formula on the methodology page and tell you the underlying EPA dataset it is calibrated against. We do not interpolate where a primary source has a value, and we do not present a population-level statistic as if it were a measurement of your home.
Why this site exists
The EPA Map of Radon Zones (publication EPA-402-R-93-071) is a free, public document. So is the EPA's Citizen's Guide to Radon (EPA-402-K-12-002) and its Consumer's Guide to Radon Reduction (EPA-402-K-10-005). Anyone who wants to know their county's EPA radon zone can, in principle, dig through state and federal websites, cross-reference a 1993 PDF map with a state screening database, and assemble the picture themselves.
Almost nobody does. The information is technically free and practically inaccessible — the EPA map is a low-resolution scan, the state surveys live in obscure agency PDFs, and the AARST mitigation standards are paywalled behind professional-society memberships. The gap we fill is editorial: we read those documents so a homeowner doesn't have to, and we publish one printable page they can fold into a folder for their next inspection or basement remodel.
We charge $15 because the dossier takes design time, hosting, payment processing, and continuous source maintenance. We do not run ads. We do not sell tests. We do not refer leads to mitigators. The PDF is the entire business.
How we make money
Every dollar of revenue comes from the $15 PDF report sale, processed by Stripe. There is no subscription, no upsell page, no "premium" tier, no consultation upsell. The PDF you buy is the entire product. If we cannot generate a report for the county you specify (rare — fewer than 1% of US counties), the purchase is refunded automatically.
We do not take commissions from radon mitigators, testing-kit vendors, real estate agents, or home inspectors. We do not run affiliate links to Amazon or any test-kit retailer. We have no paid relationship with the EPA, AARST, NRPP, NRSB, the American Lung Association, any state health department, or any company that sells radon-related products or services.
Editorial standards
What we will claim:
- The EPA Radon Zone classification (1, 2, or 3) for your county, taken directly from EPA-402-R-93-071.
- The state or county screening average pCi/L, sourced from the relevant state radon program publication and dated.
- The EPA action level of 4.0 pCi/L (EPA-402-K-12-002) and what the EPA says happens at concentrations above it.
- Mitigation cost ranges published by the EPA's Consumer's Guide to Radon Reduction and the American Lung Association.
- Effectiveness ranges for sub-slab depressurization systems, taken from EPA-402-K-10-005.
What we will not claim:
- That your individual home has a specific radon concentration. The only way to know is to test the house — see our DIY radon testing guide for how.
- That a particular mitigator is licensed, insured, or competent. Use NRPP and NRSB certification directories for that.
- That radon exposure causes any specific outcome in any specific person. The epidemiology is population-level; we present the EPA risk numbers and link to the underlying studies.
- That this report substitutes for a professional radon measurement, a home inspection, a legal disclosure, or medical advice.
What we don't cover
This site is scoped to the EPA Map of Radon Zones and US residential radon. We do not cover:
- Outside the United States. We have no data on radon zones in Canada, the UK, or any other country.
- Commercial buildings or large multi-family construction. Those fall under ANSI/AARST RMS-LB-2018 and MS-PMD-2014 — separate standards from the residential SGM-SF-2017.
- Workplace radon exposure. That is regulated by OSHA and (in mining) MSHA, not the EPA action level.
- Medical interpretation of radon exposure. Any question about whether a specific exposure has caused or will cause a specific health outcome is a question for a physician, not a publishing project.
- Legal disclosure requirements. State real-estate disclosure rules vary; we will name the EPA's Home Buyer's and Seller's Guide to Radon (EPA-402-K-13-002) as a baseline, but the specific paperwork is a question for a licensed real-estate attorney in your jurisdiction.
Contact
Email: [email protected]
For factual corrections, see our public corrections log. For an overview of every primary source we cite, see sources. For the full methodology behind the report, see methodology.