Counties with the Highest Radon Potential in Rhode Island
The top 5 of 5 Rhode Island counties on GIS Map, ranked by EPA radon zone, where zone 1 carries the highest predicted indoor radon potential and zone 3 the lowest.
| # | County | EPA radon zone |
|---|---|---|
| 1 | Bristol County | 3 |
| 2 | Newport County | 2 |
| 3 | Providence County | 2 |
| 4 | Kent County | 1 |
| 5 | Washington County | 1 |
Source: EPA Map of Radon Zones (September 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Radon Potential in Rhode Island”, https://gismap.land/rankings/rhode-island/highest-radon-counties. Figures from EPA Map of Radon Zones (September 2025).
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