Testing first

A short-term test kit is inexpensive and is the standard first step before anything else — it tells you whether a house has a problem at all. Only a test result at or above EPA's action level of 4 pCi/L points to mitigation being worth doing.

Mitigation cost, and what actually drives it

A typical radon mitigation system (a sub-slab depressurization system, the standard fix) runs roughly $800–$2,500 installed, with $1,200 a common figure for a single-family home, sourced across multiple 2026 contractor-cost guides. Cost is driven by the house's foundation type and size, not by which county or EPA zone it sits in — a Zone 3 house and a Zone 1 house with the same foundation cost about the same to mitigate.

Why this site doesn't quote a per-county cost

No credible cost dataset varies radon mitigation pricing by county or by EPA zone, so this site reports one national range rather than inventing a county-level number the data doesn't support — the same discipline every model in this factory follows: a figure only appears where the underlying data actually supports it.

Where to go next

See the range this plays out across: Loving County, TX, Logan County, KY, Middlesex County, MA.

The US Counties EPA's Radon Map Can't Rate Directly · Embed the RadonZoneCheck Radon Zone Badge