Radon Levels in Syracuse and Onondaga County: What ZIP Codes Should Know
If you live in Syracuse or anywhere in Onondaga County, radon is something worth understanding. The entire county is classified by the EPA as Radon Zone 1 — the highest-risk designation, meaning the predicted average indoor radon screening level is above the EPA action level of 4.0 pCi/L. That applies across ZIP codes, from the city core to the suburbs.
Why Onondaga County Has Elevated Radon
Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock. Central New York’s geology — glacial deposits over sedimentary and limestone bedrock — creates natural pathways for radon to migrate up from the ground and accumulate in basements and lower levels of homes. The eastern parts of the county, including areas near Manlius and DeWitt, sit over limestone bedrock that is frequently associated with higher radon readings.
Radon Varies Home to Home
Here’s the most important thing to understand: radon levels can differ dramatically between two homes on the same street. Your neighbor’s low reading tells you nothing about your own home. Foundation type, construction, soil conditions, and even how a house is ventilated all affect the level. The only way to know your home’s radon level is to test it.
What to Do If Your Levels Are High
If your home tests at or above 4.0 pCi/L, a radon mitigation system is the proven fix. Most systems use active sub-slab depressurization to draw radon out from beneath the foundation and vent it safely above the roofline, and most are installed in a single day.
Serving Syracuse, Cicero, Liverpool, Baldwinsville, Camillus, Manlius, DeWitt, and the surrounding Onondaga County communities. Call (315) 234-2853 for certified testing and a free estimate.
Request Your Free Radon Quote
Tell us about your home and a certified radon professional will get back to you with a free, no-obligation estimate. Prefer to talk now? Call (315) 234-2853.
Zip-code level differences are most noticeable between Liverpool and Cicero, where soil composition shifts noticeably across a relatively short distance.