Radon in Beaver County, Pennsylvania
Radon mitigation in Beaver County: DEP-recorded basement tests average 8.12 pCi/L across 3,568 homes — over twice EPA's 4.0 pCi/L action level — and first-floor tests average 5.33 pCi/L, above the action level on their own. A sub-slab depressurization system here typically runs $950–$2,250, installed by a DEP-certified professional.
What Radon Mitigation Costs in Beaver County
Active sub-slab depressurization systems in Beaver County run $950–$2,250 installed for a standard single-family home. The spread reflects the county's housing mix more than its radon levels: a straightforward poured-concrete or block basement is a routine single-suction installation at the lower end, while an older home in Beaver, Aliquippa, or Ambridge with a stone foundation can need additional sealing before depressurization achieves sub-action-level results, pushing toward the upper end.
A crawlspace is the largest single cost driver, because it requires sealing a vapor membrane and drawing suction beneath it rather than through a slab. A high radon concentration does not by itself raise the price — it raises the importance of correct fan sizing and of post-mitigation verification. All mitigation and testing work in Pennsylvania must be performed by a professional certified under 25 Pa. Code § 240.
How to Get It Done, and How to Vet the Contractor
Five DEP-certified mitigation firms hold business addresses in Beaver County. The PA DEP Certified Mitigation Firms Directory is the authoritative record, and certification under 25 Pa. Code § 240 is statewide, so professionals based in neighboring Allegheny and Washington counties also serve here.
Before signing a contract or accepting payment, ask for the DEP certification number and confirm it is current in the PA DEP Radon Services Directory. Ask for a proposed suction-point layout and a post-mitigation verification plan. A correctly run installation cores a suction point, runs PVC to an exterior inline fan, and exhausts above the roofline; the contractor then leaves a homeowner-run post-mitigation test kit so the result is verified independently of the installer.
A working installation should bring most Beaver County homes below the 4.0 pCi/L action level. Ask what happens if the retest comes back high — an established professional will typically guarantee return visits until the level is under the action level at no additional charge.
The 8.12 pCi/L Average — and the First-Floor Number That Matters More
Beaver County records a basement average of 8.12 pCi/L across 3,568 PA DEP-recorded tests — over twice the 4.0 pCi/L action level and 26% above the 6.44 pCi/L statewide test-weighted average across the 67 counties in the PA Radon Hub dataset. Roughly 42% of tested Beaver County homes exceed the action level.
The more consequential figure is the first floor. Beaver first-floor tests average 5.33 pCi/L across 152 measurements — above the action level on their own. In most Pennsylvania counties the first-floor average sits below 4.0 and an unfinished basement acts as a buffer between the soil gas and the living space. That is not the case here. The basement-to-first-floor ratio is 1.52: elevated radon in Beaver is reaching occupied floors, not staying below grade.
Beaver is EPA Zone 1, the highest radon-potential classification. The peak single reading in the county dataset is 253.3 pCi/L — a real result from a real home. Inside 3,568 tests it moves the county average by about 0.07 pCi/L; strip it out entirely and Beaver still averages 8.05. The anomaly is not what makes this county read high. The ordinary house does.
Why Beaver County Homes Carry Radon
Beaver County sits in the Ohio River valley, where Pleistocene glacial deposits cap uranium-bearing Pennsylvanian shale. The till-and-bedrock interface creates soil-gas pathways into the basement foundations common across the county, and the EPA Zone 1 classification reflects that elevated baseline.
The housing stock is old. The county median year built for owner-occupied housing is 1958, and the borough cores of Beaver, Aliquippa, and Ambridge run older still. Mid-century and pre-war construction in this region means block or poured basement walls with unsealed cold joints, floor drains, and no sub-slab vapor barrier — a full set of soil-gas entry points beneath a heated living space. Older homes with stone foundations frequently need sealing work before a depressurization system can pull an even negative pressure.
None of that predicts an individual home's number. A county average of 8.12 pCi/L is an average across a range that runs from below the action level to the 253.3 pCi/L peak on record. The county figure tells you what the county looks like; only a test tells you what your home is.
Measured Radon Data for Beaver County
This unusually high reading may reflect a source data anomaly or a single-home outlier; individual home results vary widely.
Source: PA DEP RadonZip Tool, January 1990 – December 2025 · Updated 2026-05-20
Read the grid against the rest of the state. Beaver averages 8.12 pCi/L in basement tests across 3,568 measurements, drawn from ZIP 15009 — a genuine measurement of the Beaver Falls area rather than a countywide census of every municipality in Beaver County. First-floor coverage is lighter at 152 tests but still lands above the action level at 5.33 pCi/L.
The 253.3 pCi/L peak is worth handling carefully because the sample is moderate. One reading of that size inside 3,568 tests shifts the county mean by roughly 0.07 pCi/L — visible in the data, not what drives the average. Treat the peak as evidence of the range that exists in Beaver County and the 8.12 figure as evidence of the center.
5 DEP-certified mitigation firms are physically based in Beaver County. Firms from adjacent counties routinely serve here as well.
Source: PA DEP Certified Mitigation Firms Directory, July 2026. This reflects business address only — firms based elsewhere may also serve Beaver County.
Cities and Boroughs in Beaver County
Beaver County's municipal pages hold the ZIP-level DEP averages behind the numbers above, the local mitigation cost range, and connections to DEP-certified professionals serving the county.
Adjacent Counties
Beaver reads high among the counties around it — well above neighboring Allegheny at 3.55 pCi/L. If you are comparing a property here against one across a county line, these are the pages with the measured numbers.
Comparing radon risk across the wider Commonwealth? Browse All 67 Pennsylvania county radon pages for EPA zone classification and measured basement averages statewide.
Connect with a DEP-Certified Radon Professional
Submit your request and we will connect you with a DEP-certified professional serving Beaver County. All providers verified against the PA Department of Environmental Protection Bureau of Radiation Protection directory.
(717) 461-2427Connect with a DEP-certified radon proPA Radon Hub is an independent informational resource. We do not perform radon testing or mitigation. We connect Pennsylvania property owners with independent, DEP-certified professionals — verify any contractor's certification at dep.pa.gov/radon before hiring.
Testing and Mitigation Options in Beaver County
Where to Put the Detector in a Beaver County Home
Test the lowest level you occupy or could plausibly finish. That is standard EPA guidance, but it carries extra weight in Beaver because the first-floor average is already 5.33 pCi/L: a first-floor test here can return an actionable result on its own. Short-term charcoal canisters and continuous monitors run 48–96 hours at $15–$50; long-term alpha-track detectors run 90 days or more and average out the heating-season stack effect that pushes winter readings above the annual mean.
When Sub-Slab Depressurization Needs Extra Sealing
On a routine Beaver basement, active sub-slab depressurization is a single-suction installation: one cored hole, an excavated pocket, PVC to an exterior inline fan, exhaust above the roofline. The county's older stone-foundation homes complicate that. Stone and rubble foundations present more cracks, cold joints, and open pathways to seal before the system can pull an even negative pressure, and that sealing work is the main reason a Beaver mitigation quote moves toward the upper end of the range. A crawlspace is handled differently again, with a sealed vapor membrane and suction drawn beneath it.
Post-mitigation verification is the step that proves the system worked. A homeowner-run short-term test after installation confirms the result independently of the installer, which is why reputable contractors leave a kit rather than certifying their own work.
Radon and a Beaver County Home Sale
Beaver County buyers and lenders frequently request radon testing during inspection contingencies, particularly for homes in Beaver, Aliquippa, and Ambridge. Pennsylvania's Real Estate Seller Disclosure Law (68 Pa.C.S. §§ 7301–7315) requires a seller to disclose known radon results but imposes no duty to test under § 7308. With a county basement average of 8.12 pCi/L and roughly 42% of tested homes above the action level, many Beaver sales will surface an actionable result — and a seller who tests before listing negotiates from a stronger position than one reacting to a buyer's inspection report under a two-week clock.
Frequently Asked Questions
How much does radon mitigation cost in Beaver County?
Most Beaver County mitigation systems run $950–$2,250 installed. Active sub-slab depressurization is the standard approach: a poured-concrete or block basement falls at the lower end, while older homes in Beaver, Aliquippa, and Ambridge with stone foundations sometimes require additional sealing before mitigation achieves sub-action-level results, pushing toward the upper end. A high radon level does not by itself increase cost. All work must be performed by a professional certified under 25 Pa. Code § 240.
What is the average radon level in Beaver County?
PA DEP-recorded basement tests in Beaver County average 8.12 pCi/L across 3,568 tests — over twice the EPA action level of 4.0 pCi/L and 26% above the 6.44 pCi/L statewide test-weighted average in the PA Radon Hub dataset. First-floor tests average 5.33 pCi/L across 152 tests, above the action level on their own. Roughly 42% of tested homes exceed the action level. The highest single result on record is 253.3 pCi/L.
Do Beaver County homes need mitigation if the basement is unfinished?
Often, yes. Beaver first-floor tests average 5.33 pCi/L, above the 4.0 pCi/L action level on their own — meaning elevated radon here is reaching occupied floors rather than staying below grade. In most Pennsylvania counties an unfinished basement buffers the living space; Beaver's first-floor average shows that buffer is frequently not enough here. Test the lowest occupied level, and if the basement is unfinished, test the first floor as well.
Why is radon elevated in Beaver County?
Beaver County sits in the Ohio River valley, where Pleistocene glacial deposits cap uranium-bearing Pennsylvanian shale. The till-and-bedrock interface creates soil-gas pathways into the older basement foundations common across the county, and the county median year built of 1958 means widespread unsealed cold joints and no sub-slab vapor barriers. EPA Zone 1 classification reflects this elevated baseline.
Are there DEP-certified radon mitigation firms based in Beaver County?
Yes. The PA DEP Certified Mitigation Firms Directory lists five mitigation firms with business addresses in Beaver County, and certified professionals based in neighboring Allegheny and Washington counties also serve the area. Certification under 25 Pa. Code § 240 is required for all radon testing and mitigation work in the Commonwealth; confirm a contractor's certification number is current in the PA DEP Radon Services Directory before signing a contract.
What should I ask a contractor before hiring in Beaver County?
Ask for the DEP certification number and confirm it is current in the PA DEP Radon Services Directory. Ask for a proposed suction-point layout and a post-mitigation verification plan, and confirm the contractor leaves a homeowner-run test kit so the result is verified independently of the installer. For an older stone-foundation home, ask specifically about the sealing work required before depressurization. Ask what happens if the retest comes back above 4.0 pCi/L — an established professional will typically return until the level is under the action level at no additional charge.
Should I test before listing a home in Beaver County?
With a county basement average of 8.12 pCi/L and roughly 42% of tested homes above the action level, a buyer's inspection-period radon test in Beaver County will frequently return an actionable result. Pennsylvania's Real Estate Seller Disclosure Law (68 Pa.C.S. §§ 7301–7315) requires disclosure of known results but imposes no duty to test under § 7308. Testing before listing is therefore a negotiating decision, not a legal one — it lets a seller address mitigation on their own timeline rather than under a closing deadline.
Which ZIP codes does the Beaver County radon data cover?
The Beaver County figures on this page aggregate ZIP code 15009, the Beaver Falls area — the ZCTA used for the PA DEP RadonZip Tool aggregation. All 3,568 basement tests and 152 first-floor tests behind the county averages come from that ZIP. Read the 8.12 pCi/L figure as a well-measured result for that area rather than a census of every municipality in Beaver County.
Related Reading
Independent resource — we do not perform testing. PA Radon Hub is an independent informational resource connecting Pennsylvania property owners with independent, DEP-certified radon professionals. We do not perform radon testing or mitigation. Verify contractor certification against the PA DEP Radon Services Directory before hiring.