618 Construction services LLC
(618) 438-1694✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Radon in ZIP code 62220
Last updated
ZIP 62220 lies entirely in St. Clair County, Illinois. EPA’s radon zone for this area: Zone 2, moderate potential.
Zone 2 St. Clair County, IL · 100% of the ZIP’s land area
Predicted average indoor screening level from 2 to 4 pCi/L.
What this means for homes in 62220
EPA built its zone map county by county in 1993, so every address in 62220 shares St. Clair 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.
Radon professionals for 62220
These professionals are listed for St. Clair County that 62220 falls in. Featured listings are paid placements and are labelled.
Action Radon Mitigation
(314) 623-0116✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Advanced Radon Mitigation, LLC
(618) 910-2034✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Air Sense Environmental
(618) 593-4815✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Central Illinois Radon Mitigation
(217) 520-6630✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Illinois Cooling Experts LLC
(618) 417-7276✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Illinois Valley Radon Mitigation, LLC
(815) 313-5892✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Inspect It Chicago
(630) 890-8634✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Midwest Radon Services, Inc.
(708) 680-6080✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
MK Radon Specialists
(815) 666-8002✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
Professional Radon Systems, Inc
(630) 236-4200✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
QC Radon Removal, LLC
(563) 949-5430✓ Verified October 4, 2026 on the official state list dated October 4, 2026, double-checked against a second state list.
See all 70 on the St. Clair County page →
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Nearby ZIP codes in St. Clair County
Illinois radon help
IL Emergency Management Agency Radon Program (217-782-4977) can help with test kits, local data and credentialed professionals: iema.illinois.gov/nrs/radon.html.
Frequently asked questions
What is the radon zone for ZIP code 62220?
ZIP 62220 lies in St. Clair County, which EPA places in Zone 2 (moderate potential).
Should I test for radon in 62220?
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 62220?
This page lists 70 professionals for the county that 62220 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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