How to find a radon expert in Harrisburg, PA
About 52% of basement tests in Harrisburg, about one in 2, came back at or above EPA's 4 pCi/L action level. That's out of 38,427 tests in PA DEP's records. That's close to Dauphin County as a whole (51%) and above the statewide share (37%). The median Harrisburg result (4.3 pCi/L) is above the 4 pCi/L line, so a typical basement test here would call for action. The Dauphin County median is 4.1 pCi/L.
Source: computed 2026-10-11 from PA DEP's Radon Test Results (data.pa.gov, public domain), using tests with a Harrisburg municipality/mailing name. Counts tests, not homes, and includes repeat and post-mitigation tests.
Harrisburg at a glance
Share of basement tests ≥ 4 pCi/L
Get free quotes Browse all Harrisburg radon firms · Dauphin County
Harrisburg compared with other PA cities
Among the 33 Pennsylvania cities with guides on Radon Roster, Harrisburg ranks #6 by share of basement tests at or above 4 pCi/L. In Dauphin County, compare it with Hershey. About 20,161 Harrisburg basement tests in DEP's records were at or above 4 pCi/L. Most homes in a high-share area won't know their number until they test, so ask a certified tester to start there.
Nearby city guides: State College · Mechanicsburg · Lancaster · Reading
What a typical Pennsylvania radon system install involves
Most systems use active soil depressurization (EPA Consumer's Guide to Radon Reduction). The installer drills a suction point through the basement slab (or seals a crawlspace with a membrane), runs PVC pipe to an inline fan, and vents the exhaust above the roofline. Then they seal major openings and add a pressure gauge. A follow-up test should confirm the level dropped. PA DEP describes the confirm-then-mitigate steps on PA DEP: Radon in the Home.
Radon mitigation cost: what Harrisburg homeowners can expect
| Item | Typical range (national) |
|---|---|
| Mitigation system installed | $786-$1,274, average about $1,028 (reported range $395-$2,453) |
| Professional radon test | $150-$800 |
Source: HomeAdvisor cost guide. These are national figures, not local quotes. Prices depend on foundation type, the number of suction points and pipe routing. Try the estimate tool.
Nearest certified radon firms
Nearest DEP-certified firms: 6 based in Harrisburg (4 mitigation), 3 elsewhere in Dauphin County (1 mitigation), and 13 mitigation firms in neighboring counties.
Enviroquest, Inc.
✓ PA DEP certifiedMitigationTestingHarrisburg4 certified people
Enviroquest, Inc.
✓ PA DEP certifiedMitigationTestingAddress
- 1738 N 3Rd St Ste A, Harrisburg, PA
- ✉ evq@comcast.net
Certified individuals
- Durborow, Brent (testing #9068)
- Miller, Cory (mitigation #7516)
- Staz, Iii, John (testing #1512, mitigation #1512)
- Staz, Michael (mitigation #7227)
DEP cert IDs
Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing
Enviroquest, Inc.
✓ PA DEP certifiedMitigationHarrisburg1 certified person
Enviroquest, Inc.
✓ PA DEP certifiedMitigationAddress
- 1738 N. 3Rd St, Harrisburg, PA
- ✉ evq@comcast.net
Certified individuals
- Durborow, Brent (mitigation #7458)
DEP cert IDs
Source: DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing
Radon, Joseph
✓ PA DEP certifiedMitigationTestingHarrisburg1 certified person
Radon, Joseph
✓ PA DEP certifiedMitigationTestingAddress
- 400 Market St, Harrisburg, PA
- ✉ coonsmj13@gmail.com
Certified individuals
- Radon, Joseph (testing #1234, mitigation #1234)
DEP cert IDs
Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing
Zzzz Brp Demo Account
✓ PA DEP certifiedMitigationTestingHarrisburgCertified firm
Zzzz Brp Demo Account
✓ PA DEP certifiedMitigationTestingAddress
- Po Box 8469, Harrisburg, PA
- ✉ macoons@pa.gov
Certified individuals
- None listed separately
DEP cert IDs
Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing
Sipe, Steven
✓ PA DEP certifiedMitigationTestingHalifax1 certified person
Sipe, Steven
✓ PA DEP certifiedMitigationTestingAddress
- 69 Million Dollar Rd, Halifax, PA
- ✉ csinspect@comcast.net
Certified individuals
- Sipe, Steven (testing #3287, mitigation #3287)
DEP cert IDs
Source: DEP list DEP list, retrieved 2026-10-11 · Claim, correct or remove this listing
See all firms near Harrisburg →
Buying or selling in Harrisburg? Radon timing tips
- Pennsylvania sellers must give buyers a property disclosure statement before an agreement of sale is signed. The Real Estate Commission's minimum form asks whether the seller knows of hazardous substances "including... radon" and whether the property has been tested (49 Pa. Code § 35.335a; 68 Pa.C.S. Chapter 73).
- Sellers aren't required to test, but must not hide known defects (68 Pa.C.S. § 7308).
- Real estate radon tests by certified testers follow DEP anti-tampering rules, including a signed non-interference agreement (25 Pa. Code Chapter 240). Book the test early in the inspection contingency window, because short-term tests run at least 2 days plus lab time.
- If a result is high near closing, ask certified mitigators for written quotes. Buyers and sellers often negotiate who pays for a system.
General information, not legal advice.
How to verify a Harrisburg radon contractor's PA DEP certification
- Check the name against DEP's current certified mitigation and testing lists in the PA DEP Radon Services Directory. The lists are updated periodically, and ours were retrieved 2026-10-11.
- Ask for the DEP certification number and photo ID. Pennsylvania requires anyone doing radon testing, mitigation or lab work for the public to be DEP-certified (25 Pa. Code Chapter 240).
- Still unsure? Call the PA DEP Radon Hotline at 800-237-2366.
Every firm listed for Harrisburg on Radon Roster shows its DEP IDs and a link to the source list.
Questions to ask a mitigator before you sign
- What is your PA DEP certification number, and will you show your DEP photo ID? (Certified people must show it on request under 25 Pa. Code Chapter 240.)
- Will you do diagnostic (sub-slab suction) testing before choosing fan size and suction points?
- Where will the pipe run (inside or outside), and where will the fan and exhaust go?
- What post-mitigation level do you guarantee, and what happens if the retest is high?
- Who does the follow-up test, and is it an independent certified tester?
Frequently asked questions
How do I find a certified radon expert in Harrisburg, PA?
Use a firm on PA DEP's certified lists. Radon Roster lists 6 DEP-certified firms based in Harrisburg and 3 more in Dauphin County. Confirm any name in the PA DEP Radon Services Directory or call 800-237-2366.
Is radon common in Harrisburg?
In PA DEP's test records, 52% of 38,427 basement tests with a Harrisburg address were at or above 4 pCi/L (median 4.3 pCi/L). Results vary house to house, so only a test tells you your level.
How much does radon mitigation cost in Harrisburg?
We don't have Harrisburg-specific price data. A national cost guide puts typical installs at $786-$1,274 (average about $1,028). Get written quotes from certified local mitigators.
Do I need a radon test when buying a home in Pennsylvania?
It isn't required by state law. The seller's disclosure form asks about known radon and past testing, and many buyers order a test during the inspection period. Real estate tests by certified testers follow DEP anti-tampering rules.
How long does a radon test take?
Short-term tests run 2 to 7 days. Long-term tests run more than 90 days. PA DEP suggests confirming a high short-term result before deciding on mitigation.