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(570) 561-3981✓ Verified October 4, 2026 on the official state list dated October 1, 2026, double-checked against a second state list.
Radon in ZIP code 18823
Last updated
ZIP 18823 lies entirely in Susquehanna County, Pennsylvania. EPA’s radon zone for this area: Zone 1, highest potential.
Zone 1 Susquehanna County, PA · 100% of the ZIP’s land area
Predicted average indoor screening level above 4 pCi/L.
What this means for homes in 18823
EPA built its zone map county by county in 1993, so every address in 18823 shares Susquehanna County’s prediction. The zone is a starting point, not a measurement of your house. Zone 1 areas like this one have a high share of homes above 4 pCi/L, so testing is a priority.
Next: read how to test your home, then check the number with the level calculator.
Radon professionals for 18823
These professionals are listed for Susquehanna County that 18823 falls in. Featured listings are paid placements and are labelled.
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Get radon quotes from certified pros in ZIP 18823
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Nearby ZIP codes in Susquehanna County
Pennsylvania radon help
PA Dept. of Environmental Protection, Bureau of Radiation Protection (717-783-3594) can help with test kits, local data and credentialed professionals: www.dep.pa.gov/Business/RadiationProtection/RadonDivision/Pages/Radon-in-the-home.aspx.
Frequently asked questions
What is the radon zone for ZIP code 18823?
ZIP 18823 lies in Susquehanna County, which EPA places in Zone 1 (highest potential).
Should I test for radon in 18823?
Yes. EPA recommends testing every home regardless of zone, because radon varies from house to house. Fix the home if a confirmed result is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L.
Are there certified radon professionals near 18823?
This page lists 1 professional for the county that 18823 falls in, each checked against the state's official certification or licence list.
Free checklist · PDF
Radon Test Checklist
A one-page, step-by-step checklist for running a home radon test right the first time, and what to do with the number.
- Short-term vs. long-term test: which to use
- Closed-house conditions and where to place the kit
- What 2, 4 and 8 pCi/L mean and when to fix
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