Jackson Parish, LA: EPA's radon zone, explained

EPA's own radon map rates Jackson Parish zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Rank it against the rest of the country and Jackson Parish lands in the 10th percentile for radon potential.

Jackson Parish by the numbers

Jackson Parish, Louisiana is home to about 14,797 people across 569.655 square miles. Population density there runs about 26 people per square mile. By population, Jackson Parish is the 713th largest of every county sharing its EPA zone — the 31st percentile by population within that zone. EPA's geology-based Region 6 groups Jackson Parish with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

At Zone 3, Jackson Parish's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. A Zone 3 label describes Jackson Parish's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Jackson Parish tests above the action level

For a Jackson Parish 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 Louisiana's state radon program

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

Where Jackson Parish's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Jackson Parish carries, the zone explainer covers what it does and doesn't tell you about any one house.