Cypress, IL Radon Mitigation and Testing

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.

Johnson County

EPA Zone 2

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.

Cypress, IL Radon Mitigation

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

Cypress, IL Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Cypress Radon Facts

Key details about the radon risk profile for Cypress and the 62923 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Johnson County, IL

Zip Code

62923

Predicted Screening Level

2–4 pCi/L (Zone 2)

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

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.

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.

Most Active Radon Markets in Illinois

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Buffalo Grove	6.10 pCi/L	10
Crystal Lake	7.25 pCi/L	8
Lake Zurich	6.00 pCi/L	7
Grayslake	5.00 pCi/L	7
New Lenox	10.17 pCi/L	6
Park Ridge	7.00 pCi/L	6
Arlington Heights	6.17 pCi/L	6
Waterloo	9.20 pCi/L	5
Palatine	7.80 pCi/L	5
Round Lake	7.80 pCi/L	5
Northbrook	6.20 pCi/L	5
Mchenry	11.00 pCi/L	4
Dekalb	8.75 pCi/L	4
Columbia	8.00 pCi/L	4
Lisle	7.25 pCi/L	4
Normal	7.25 pCi/L	4
Antioch	7.00 pCi/L	4
Elk Grove Village	7.00 pCi/L	4
Aurora	6.75 pCi/L	4
Hoffman Estates	6.75 pCi/L	4