Radon testing & mitigation in Warren County, PA
47% 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.
Warren County radon test data
Share of basement tests ≥ 4 pCi/L
First floor: 26% of 613 tests ≥ 4 pCi/L, median 1.9
Source: computed 2026-10-11 from PA DEP's Radon Test Results, Sept 1986 - Current (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.
1 DEP-certified firms have a business address in Warren County (1 offer mitigation), with 1 certified individuals between them. Get free quotes
Radon mitigation (reduction systems) (1 firm)
Firms certified to install radon reduction systems. Firms that also test are shown here once.
Shaw, Matthew
✓ PA DEP certifiedMitigationTestingPittsfield1 certified person
Shaw, Matthew
✓ PA DEP certifiedMitigationTestingAddress
- 7735 Davey Hill Rd, Pittsfield, PA
- ✉ eagleeyeinspection74@gmail.com
Certified individuals
- Shaw, Matthew (testing #3193, mitigation #3193)
DEP cert IDs
Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing
Neighboring counties
Crawford (3 firms) · Elk (1 firms) · Erie (6 firms) · Forest (0 firms) · McKean (0 firms) · Venango (2 firms). Firms often serve across county lines.
Adjacency from U.S. Census Bureau county adjacency file.
Hiring a radon pro in Warren County: quick guide
With 47% of 3,863 basement tests at or above 4 pCi/L (above the 37% statewide share), Warren County has 1 DEP-certified mitigation firm based locally.
- Verify: check the firm in the PA DEP Radon Services Directory, ask for the DEP ID (25 Pa. Code Chapter 240), or call 800-237-2366.
- Typical cost: $786-$1,274 for a mitigation system, national range from the HomeAdvisor cost guide.
- Selling or buying: PA's seller disclosure form asks about known radon and past tests (49 Pa. Code § 35.335a).
Frequently asked questions
How many certified radon mitigation firms are in Warren County?
1 DEP-certified firms offering mitigation and 1 certified radon firms in total list a business address in Warren County (PA DEP lists dated 10/01/2026). Firms from neighboring counties may also serve the area.
What share of Warren County radon tests are high?
47% of 3,863 basement tests in PA DEP's records were at or above EPA's 4 pCi/L action level, with a median of 3.7 pCi/L.
How much does radon mitigation cost in Warren 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.