Pratt County, KS: EPA's radon zone, explained

EPA places Pratt County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Pratt County sits at the 75th percentile nationally for radon potential — above 75 of every 100 rated counties.

How Pratt County compares

Pratt County, Kansas is home to about 9,137 people across 735.039 square miles. Averaged across its land area, Pratt County runs about 12 people per square mile. By population, Pratt County is the 791st largest of every county sharing its EPA zone — the 26th percentile by population within that zone. Pratt County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Pratt County

Pratt County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. That doesn't mean every Pratt County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

Next steps for a home in Pratt County

For a Pratt 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 Kansas's state radon program

For Pratt County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Pratt 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 Pratt County's figures come from

Pratt 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.