La Salle, IL Radon Levels
Check local La Salle radon levels and find certified testing and mitigation professionals to keep your home safe
La Salle, IL Radon Facts
Positioned in La Salle County along Illinois River valley alluvial soils, La Salle's geological setting combines river deposits with underlying Ordovician limestone that creates variable radon conditions. The area's EPA Zone 1 designation reflects significant radon potential, though specific testing data for zip code 61301 remains scarce. Homeowners in this region should prioritize professional radon testing, as readings can differ dramatically between neighboring properties due to localized soil conditions.
La Salle County average: 8.00 pCi/L, based on 5 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for La Salle itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.
La Salle, IL Radon Mitigation
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Radon Readings Near La Salle, IL
No homeowner tests have been submitted for La Salle yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Peru | 1.8 mi | 6.50 pCi/L | 2 |
| Spring Valley | 5.8 mi | 2.00 pCi/L | 1 |
| Princeton | 17.2 mi | 11.50 pCi/L | 2 |
| Earlville | 19.3 mi | 11.00 pCi/L | 1 |
| Streator | 20.6 mi | 7.00 pCi/L | 1 |
| Marseilles | 20.8 mi | 9.00 pCi/L | 1 |
| Varna | 22.9 mi | 20.00 pCi/L | 1 |
| Ancona | 24.1 mi | 20.00 pCi/L | 1 |
La Salle County Radon Profile
The bedrock and soils beneath La Salle County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 4 cities in La Salle County average 8.00 pCi/L across 5 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in La Salle County.