Lake and Peninsula Borough, AK: EPA's radon zone, explained

EPA's own radon map rates Lake and Peninsula Borough zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 1st percentile for radon potential — Lake and Peninsula Borough outranks 1% of every county EPA has rated.

Lake and Peninsula Borough by the numbers

Lake and Peninsula Borough, Alaska is home to about 1,315 people across 23,896.583 square miles. Population density there runs about 0 people per square mile. By population, Lake and Peninsula Borough is the 1005th largest of every county sharing its EPA zone — the 3rd percentile by population within that zone. Lake and Peninsula Borough falls in EPA Radon Region 10, one of 142 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Lake and Peninsula Borough's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Lake and Peninsula Borough's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Lake and Peninsula Borough tests above the action level

For a Lake and Peninsula Borough 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 Alaska's state radon program

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

Where Lake and Peninsula Borough's figures come from

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