Radon · Nevada
Radon in Nevada
Of the 4 Nevada ZIPs zipradar carries, 1 sits in EPA Radon Zone 1 (highest predicted potential, above 4 pCi/L), 2 in Zone 2 (moderate, 2–4 pCi/L), 1 in Zone 3 (lowest, below 2 pCi/L). The zone is a county-level EPA prediction, not a reading from any building — it narrows the question but does not settle it, and EPA's own guidance is that the only way to know a specific home is an at-home test kit.
Last verified 2026-09-24 · methodology
Radon by ZIP code in Nevada
EPA's county radon zone for each ZIP zipradar covers. Tap a ZIP for what the zone means and how to test.
| ZIP | EPA radon zone |
|---|---|
| 89101Las VegasClark County | Zone 3 · lowest |
| 89501RenoWashoe County | Zone 2 · moderate |
| 89701Carson CityCarson City | Zone 1 · highest |
| 89509Reno (Southwest)Washoe County | Zone 2 · moderate |
County-level figures from EPA Radon Zones, joined to each ZIP by county. None of them is a measurement at a specific address.
What lands here
Pages show the county zone, what the classification means for home testing recommendations, and state-level supplementary data where available.
Source & refresh
EPA Radon Zones. Refreshed static 1993 baseline plus state-level supplementary updates. Primary source →
Nevada top concern
Wildfire, water-supply (Colorado River allotment)
Nevada's wildfire risk concentrates in the western Sierra foothills (Reno, Carson City, Lake Tahoe). Las Vegas water supply tied to declining Lake Mead Colorado River allotment. EPA SDWIS shows arsenic challenges in some rural systems.
See Nevada state page for the full state-level rollup across all 12 dimensions.
Read more on radon
Editorial deep-dives explaining the source data, its limits, and how to read it.
EPA Radon Zones — what 1, 2, and 3 mean and when you should test
EPA classifies every US county into Zone 1 (high), Zone 2 (moderate), or Zone 3 (low) for radon. Plain-English guide to the classifications and at-home testing.
EPA SDWIS — how to read drinking-water violations and what they actually mean
Plain-English guide to EPA SDWIS drinking-water violations: health-based vs. monitoring vs. reporting violations, MCLs, and what triggers a public notice.
Radon and real estate — what disclosure laws and home tests actually require
What home sellers must disclose about radon by state, when home tests are required, and how to interpret radon-mitigation systems if a home you're buying has one.
Radon disclosure during real-estate transactions — state-by-state
Whether sellers must disclose known radon results varies by state. Quick map of mandatory-disclosure states + what to ask for during inspection.