About RadonVerdict
A public-data tool for radon decisions, not a contractor directory pretending to be advice.
RadonVerdict helps homeowners, buyers, sellers, and agents turn public radon data into a practical next step: test first, retest, budget mitigation, or compare a seller-credit number.
Operator
RadonVerdict is operated as an independent software and public-data project.
Editorial Owner
RadonVerdict Data Team, focused on public data, cost modeling, and homeowner decision flows.
Contact
Questions, corrections, and partnership inquiries go through the contact page.
What We Do
We combine EPA county radon zones, state radon program information, Census housing data, ZIP-to-county mapping, and public cost references to create local radon action pages. The goal is to reduce uncertainty before a homeowner buys a test kit, calls contractors, or negotiates a real-estate credit.
What We Do Not Do
- We do not perform radon testing or mitigation work.
- We are not a medical provider, law firm, government agency, or certified radon laboratory.
- We do not know the radon level inside a specific home unless the user enters a test result.
- We do not guarantee contractor pricing, licensing status, or availability.
Data Sources We Rely On
EPA Map of Radon Zones
County-level Zone 1, 2, and 3 classifications. Zone data is useful for regional risk context, but it cannot predict one home's actual radon level.
Open EPA radon zonesState Radon Programs
State health and environmental agencies are used for official radon program links, disclosure notes, and contractor credential expectations.
Public Cost References and Local Adjustments
Cost ranges are estimates, not quotes. We use public cost references, foundation type, home-size assumptions, and regional cost factors to produce a practical planning range.
Editorial Standards
- Health and action-level claims are tied to EPA, WHO, NAS, or similar public-health sources.
- County pages show source dates where available instead of implying that every page is manually reviewed every day.
- Affiliate links are labeled where they appear. Affiliate status does not change the radon thresholds or cost logic.
- When a page discusses state rules, we link users back to the official state resource for verification.
Important limitation
Radon is a health risk, but RadonVerdict is an informational tool. The only reliable way to know a home's radon concentration is to test that home under valid conditions. For medical questions, contact a qualified health professional. For mitigation work, verify local licensing and certification requirements before hiring.
How the method works
The methodology page explains the data inputs, cost-estimate limits, and why county-level zone data should be treated as a starting point rather than a home-specific result.
Read the methodology