Cypress, IL Radon Levels

Q: What EPA Radon Zone is Cypress in?

Cypress is in Johnson County, EPA Zone 2.

Q: How much does radon mitigation cost in Cypress?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Cypress radon levels and find certified testing and mitigation professionals to keep your home safe

Cypress, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Johnson County, IL

Zip Code 62923

Small Cypress lies in Johnson County within southern Illinois's Shawnee Hills region, where sandstone and shale formations generally produce lower radon levels compared to the state's glaciated northern areas. Testing data for the 62923 area remains limited, though the underlying Pennsylvanian geology can still generate radon requiring attention. Homeowners should establish baseline readings, particularly in older properties with basements or crawl spaces.

7.50

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.50 pCi/L, based on 2 tests from 2 nearby cities. No readings have been submitted for Cypress yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Cypress, IL Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon Readings Near Cypress, IL

No homeowner tests have been submitted for Cypress yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Marion	25.0 mi	5.00 pCi/L	1
Murphysboro	33.9 mi	10.00 pCi/L	1

Johnson County Radon Profile

Johnson County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. User-submitted readings are still sparse within Johnson County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Johnson County.

Radon FAQ for Cypress, IL

What EPA Radon Zone is Cypress in?

Cypress and the 62923 zip code are in Johnson County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Cypress?

No homeowner radon tests have been submitted for Cypress yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Johnson County average—are the best available indicator of local conditions until Cypress homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Cypress?

Radon mitigation in Cypress typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Cypress?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.