Webster, SD Radon Mitigation and Testing

Q: What is the average radon level in Webster, SD?

Based on 1 user-submitted tests, the average radon level is 20.00 pCi/L.

Q: What EPA Radon Zone is Webster in?

Webster is in Day County, EPA Zone 1.

Q: How much does radon mitigation cost in Webster?

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

Avg: 20.00 pCi/L

Day County

EPA Zone 1

1 user test

Webster is located in Day County, South Dakota. With 1 user-submitted readings averaging 20.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 57274 zip code.

20.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Webster, SD. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Webster, SD Radon Mitigation

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

Webster, SD Radon Testing

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

Webster, South Dakota Radon Levels

User-submitted radon test readings from homes in the Webster area.

Radon Level	City	Home Age	Foundation	Submitted
20 pCi/L	Webster, SD	0-20 Years	Full Basement	Feb 2022

Have a radon test result for Webster? Submit your reading to help other homeowners.

Webster Radon Facts

Key details about the radon risk profile for Webster and the 57274 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Day County, SD

Zip Code

57274

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

20.00 pCi/L

User Tests Submitted

Webster and the 57274 zip code are located in Day County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Webster, SD

What is the average radon level in Webster, SD?

Based on 1 user-submitted test, the average radon level in Webster is 20.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Webster in?

Webster and the 57274 zip code are in Day County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Webster?

Radon mitigation in Webster 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 Webster?

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 South Dakota

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

City	Avg User Radon Level	Submissions
Spearfish	7.75 pCi/L	4
Rapid City	10.50 pCi/L	2
Aberdeen	8.50 pCi/L	2
Sioux Falls	6.00 pCi/L	2
Watertown	6.00 pCi/L	2