Steuben County, NY: EPA's radon zone, explained

EPA places Steuben 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. Nationally, Steuben County ranks higher in radon potential than 93% of rated counties (the 93rd percentile).

How Steuben County compares

Steuben County, New York is home to about 92,015 people across 1,390.51 square miles. That works out to roughly 66 people per square mile. By population, Steuben County is the 209th largest of every county sharing its EPA zone — the 80th percentile by population within that zone. Geologically, Steuben County is grouped into EPA Region 2 alongside 82 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Where the national indoor average runs about 1.3 pCi/L, Steuben County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Steuben 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.

If Steuben County tests above the action level

For a Steuben 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 York's state radon program

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

Where Steuben County's figures come from

Steuben County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.