--- title: "Certified Radon Mitigation & Testing in Columbia County, PA | Radon Roster" description: "2 PA DEP-certified radon firms in Columbia County: 51% of basement tests at or above 4 pCi/L. Contacts, DEP cert IDs and local data." canonical: https://radonroster.com/pa/county/columbia/ --- [Pennsylvania](https://radonroster.com/)›[Counties](https://radonroster.com/pa/counties/)›Columbia # Radon testing & mitigation in Columbia County, PA 51% of basement tests here came back at or above 4 pCi/L, well above the statewide 37%. That means about one in 2 homes tested needs a fix. ## Columbia County radon test data Columbia**51%** Statewide**37%** Share of basement tests ≥ 4 pCi/L **4.1**median basement pCi/L **10,285**basement tests on record **#20**of 67 PA counties by share ≥ 4 First floor: **24%** of 2,269 tests ≥ 4 pCi/L, median 1.6 Source: computed 2026-10-11 from PA DEP's [Radon Test Results, Sept 1986 - Current](https://data.pa.gov/Energy-and-the-Environment/Radon-Test-Results-September-1986-Current-Annual-C/vkjb-sx3k) (data.pa.gov, public domain). Counts tests, not homes: repeat and post-mitigation tests are included. Only a test tells you your home's level. **2 DEP-certified firms** have a business address in Columbia County (1 offer mitigation), with 2 certified individuals between them. [Get free quotes](https://radonroster.com/get-quotes/?county=columbia) [Mitigation1](#mitigation)[Testing1](#testing)Labs 0Ordered by town, then name · never by payment ## Radon mitigation (reduction systems) (1 firm) Firms certified to install radon reduction systems. Firms that also test are shown here once. ### Ralston, Jeffrey ✓ PA DEP certifiedMitigationTesting Bloomsburg1 certified person #### Address * 422 Valley Rd, Bloomsburg, PA * ✉ [paradonsolutions@yahoo.com](mailto:paradonsolutions@yahoo.com) #### Certified individuals * Ralston, Jeffrey (testing #3163, mitigation #3163) #### DEP cert IDs mitigation #3163 · testing #3163 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyMitigation.pdf) [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F3163) [**Call** (570) 384-3574](tel:5703843574) ## Radon testing (1 firm) ### Devries, Walter ✓ PA DEP certifiedTesting Millville1 certified person #### Address * 203 Hogs Back Rd, Millville, PA * ✉ [walt@rockhouseinspection.com](mailto:walt@rockhouseinspection.com) * [rockhouseinspection.com](https://www.rockhouseinspection.com/) #### Certified individuals * Devries, Walter (testing #3598) #### DEP cert IDs testing #3598 Source: [DEP list](https://files.dep.state.pa.us/RadiationProtection/RadonDivision/RDPortalFiles/2026/10_01/CountyTest.pdf), retrieved 2026-10-11 · [Claim, correct or remove this listing](https://radonroster.com/claim-listing/?firm=F3598) [**Call** (570) 380-9110](tel:5703809110) ## Neighboring counties [Luzerne](https://radonroster.com/pa/county/luzerne/) (13 firms) · [Lycoming](https://radonroster.com/pa/county/lycoming/) (2 firms) · [Montour](https://radonroster.com/pa/county/montour/) (0 firms) · [Northumberland](https://radonroster.com/pa/county/northumberland/) (1 firms) · [Schuylkill](https://radonroster.com/pa/county/schuylkill/) (5 firms) · [Sullivan](https://radonroster.com/pa/county/sullivan/) (0 firms). Firms often serve across county lines. Adjacency from U.S. Census Bureau county adjacency file. ## Hiring a radon pro in Columbia County: quick guide With 51% of 10,285 basement tests at or above 4 pCi/L (above the 37% statewide share), Columbia County has 1 DEP-certified mitigation firm based locally. * **Verify:** check the firm in the [PA DEP Radon Services Directory](https://www.pa.gov/agencies/dep/programs-and-services/radiation-protection/radon-division/radon-services-directory), ask for the DEP ID ([25 Pa. Code Chapter 240](https://files.dep.state.pa.us/RadiationProtection/BureauOfRadiationProtection/BRPPortalFiles/Chapter_240_2015-04-23.pdf)), or call 800-237-2366. * **Typical cost:** $786-$1,274 for a mitigation system, national range from the [HomeAdvisor cost guide](https://www.homeadvisor.com/cost/environmental-safety/remove-radon-gas/). * **Selling or buying:** PA's seller disclosure form asks about known radon and past tests ([49 Pa. Code § 35.335a](https://www.pacodeandbulletin.gov/secure/pacode/data/049/chapter35/s35.335a.html)). ## Frequently asked questions **How many certified radon mitigation firms are in Columbia County?** 1 DEP-certified firms offering mitigation and 2 certified radon firms in total list a business address in Columbia County (PA DEP lists dated 10/01/2026). Firms from neighboring counties may also serve the area. **What share of Columbia County radon tests are high?** 51% of 10,285 basement tests in PA DEP's records were at or above EPA's 4 pCi/L action level, with a median of 4.1 pCi/L. **How much does radon mitigation cost in Columbia County?** We don't have county-specific price data. A national cost guide reports typical installs at $786-$1,274. Get written quotes from DEP-certified mitigators. **Want firms to contact you?**One request to Columbia mitigators[Request quotes](https://radonroster.com/get-quotes/?county=columbia) Our advice ## Before you hire in Columbia 1. Ask for the DEP cert ID and match it to the listing. 2. Get at least two written quotes for mitigation. 3. Retest after the system is installed. PA Radon Hotline **800-237-2366** Typical mitigation cost $786–$1,274 National range (HomeAdvisor). No local price data; quotes vary by foundation type. [Estimate your cost →](https://radonroster.com/radon-mitigation-cost/) ## Want firms to contact you? Send one request to certified mitigators who serve Columbia. [Request quotes](https://radonroster.com/get-quotes/?county=columbia)