West Union, IL Radon Mitigation and Testing

Q: What EPA Radon Zone is West Union in?

West Union is in Clark County, EPA Zone 2.

Q: How much does radon mitigation cost in West Union?

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

Clark County

EPA Zone 2

Found in Clark County in east-central Illinois, West Union sits in an area where glacial deposits over Pennsylvanian bedrock create moderate radon potential. The community's housing includes both historic farmsteads and mid-century construction, with basement foundations common throughout the region. Testing data for zip code 62477 remains limited, making individual home testing essential for residents to understand their radon exposure risk.

West Union, IL Radon Mitigation

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

West Union, IL Radon Testing

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

West Union Radon Facts

Key details about the radon risk profile for West Union and the 62477 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Clark County, IL

Zip Code

62477

Predicted Screening Level

2–4 pCi/L (Zone 2)

West Union and the 62477 zip code are located in Clark 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 West Union, IL

What EPA Radon Zone is West Union in?

West Union and the 62477 zip code are in Clark 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 West Union?

Radon mitigation in West Union 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 West Union?

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