Radon in ZIP code 19703
Last updated
ZIP 19703 lies entirely in New Castle County, Delaware. EPA’s radon zone for this area: Zone 2, moderate potential.
Predicted average indoor screening level from 2 to 4 pCi/L.
What this means for homes in 19703
EPA built its zone map county by county in 1993, so every address in 19703 shares New Castle County’s prediction. The zone is a starting point, not a measurement of your house. In a Zone 2 area many homes are fine and many are not; only a test tells you which yours is.
Next: read how to test your home, then check the number with the level calculator.
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Nearby ZIP codes in New Castle County
Delaware radon help
DEHSS Division of Public Health, Office of Healthy Environments, Radon Program (302-744-4727) can help with test kits, local data and credentialed professionals: dhss.delaware.gov.
Frequently asked questions
What is the radon zone for ZIP code 19703?
ZIP 19703 lies in New Castle County, which EPA places in Zone 2 (moderate potential).
Should I test for radon in 19703?
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.
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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