Radon · North Carolina
Radon in North Carolina
Radon (EPA Radon Zones) data for ZIP codes in North Carolina. Pick a ZIP below to dive into the radon summary.
Last verified 2026-05-13 · methodology
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 →
North Carolina top concern
Hurricanes (coastal), PFAS in Cape Fear
North Carolina's Outer Banks + coastal counties carry extensive FEMA VE/AE coverage. Wilmington + Cape Fear basin has documented PFAS contamination flagged in EPA SDWIS. Wildfire risk in western Appalachian counties.
See North Carolina 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.
14 North Carolina ZIPs
ZIP 28202
Charlotte, NC
Radon →
ZIP 27601
Raleigh, NC
Radon →
ZIP 27514
Chapel Hill, NC
Radon →
ZIP 28403
Wilmington, NC
Radon →
ZIP 28801
Asheville, NC
Radon →
ZIP 27401
Greensboro, NC
Radon →
ZIP 28207
Charlotte (Myers Park), NC
Radon →
ZIP 27517
Pittsboro, NC
Radon →
ZIP 27402
Greensboro, NC
Radon →
ZIP 28704
Arden (NC, Asheville S), NC
Radon →
ZIP 27511
Cary (NC), NC
Radon →
ZIP 27709
Research Triangle Park, NC
Radon →
ZIP 28804
Asheville (North), NC
Radon →
ZIP 28078
Huntersville (NC), NC
Radon →