Is Poquoson city, VA a radon risk area?

EPA places Poquoson city in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 9th percentile for radon potential — Poquoson city outranks 9% of every county EPA has rated.

How Poquoson city compares

About 12,854 people live in Poquoson city, Virginia, spread over 15.357 square miles. Averaged across its land area, Poquoson city runs about 837 people per square mile. Rank 756 by population within its EPA zone puts Poquoson city at the 27th percentile among zone peers.

What this actually means for a house in Poquoson city

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Poquoson city's Zone 3 prediction is the low end of the scale. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Poquoson city testing above the action level often enough that skipping a test isn't the safe assumption.

If Poquoson city tests above the action level

Nothing about Poquoson city's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Virginia's state radon program

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Poquoson city's numbers. Whatever zone Poquoson city carries, the zone explainer covers what it does and doesn't tell you about any one house.