Round Rock, TX Radon Levels
Check local Round Rock radon levels and find certified testing and mitigation professionals to keep your home safe
Round Rock, TX Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Williamson County, TX
Zip Code
78664
Major Williamson County suburb within the Austin Metro area, Round Rock sits over limestone and shale formations of the Texas Hill Country. Testing data for the 78664 zip code remains limited despite the community's significant population growth. Residents should conduct radon testing given the area's limestone geology and the potential for radon accumulation in newer suburban developments.
Round Rock, TX Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Round Rock?
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Radon FAQ for Round Rock, TX
What EPA Radon Zone is Round Rock in?
Round Rock and the 78664 zip code are in Williamson County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
How much does radon mitigation cost in Round Rock?
Radon mitigation in Round Rock 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 Round Rock?
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 Texas
Cities in Texas with the most user-submitted radon test data, ranked by number of submissions.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Lubbock | 12.70 pCi/L | 10 |
| San Antonio | 6.57 pCi/L | 7 |
| Austin | 6.14 pCi/L | 7 |
| Dallas | 8.00 pCi/L | 5 |
| Abilene | 4.50 pCi/L | 2 |
| Houston | 3.50 pCi/L | 2 |
| Plano | 6.00 pCi/L | 1 |
| Frisco | 3.00 pCi/L | 1 |
| Nacogdoches | No submissions | 0 |