Cibola County, NM: EPA's radon zone, explained

EPA's own radon map rates Cibola County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Cibola County ranks higher in radon potential than 49% of rated counties (the 49th percentile).

How Cibola County compares

Cibola County, New Mexico is home to about 26,686 people across 4,539.984 square miles. Averaged across its land area, Cibola County runs about 6 people per square mile. By population, Cibola County is the 525th largest of every county sharing its EPA zone — the 49th percentile by population within that zone. Cibola County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

EPA's Zone 2 rating for Cibola County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Cibola County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Testing and mitigation in Cibola County

For a Cibola County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find New Mexico's state radon program

For Cibola County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Cibola County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Cibola County's figures come from

Cibola County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.