What EPA's radon map says about Mora County

EPA's own radon map rates Mora County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 70th percentile for radon potential — Mora County outranks 70% of every county EPA has rated.

Where Mora County sits nationally

About 4,096 people live in Mora County, New Mexico, spread over 1,926.253 square miles. Averaged across its land area, Mora County runs about 2 people per square mile. Among counties sharing Mora County's EPA zone, it outranks 11% of them by population. Mora County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Mora County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. Being in Zone 1 raises the odds Mora County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

If Mora County tests above the action level

Mitigation cost doesn't depend on Mora County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find New Mexico's state radon program

Mora County's test kit answers today; a Airthings radon monitor keeps answering for Mora County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Mora County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.