Radon Mitigation in Lewisburg
High radon risk from Ordovician limestone of the Central Pennsylvania Ridge and Valley province. Lewisburg sits in a carbonate valley along the West Branch Susquehanna where the same Ordovician formations that produce elevated radon across the Nittany and Great Valleys extend into Union County. Bucknell University's consistent student rental turnover means a large fraction of the housing stock is occupied by transient residents, and much of the borough's pre-1980 housing has never been tested despite Union County's Zone 1 classification.
High Radon Risk Area
Lewisburg sits in EPA Zone 1 — testing is recommended for every home regardless of age or foundation type.
Local Geology & Risk Factors
Lewisburg is located in an area with Central PA Ridge and Valley / Ordovician Limestone geology, which contributes to elevated radon levels. The Pennsylvania DEP identifies this region as having significant radon potential due to uranium-bearing rock formations.
Testing is essential because radon levels can vary significantly between neighboring homes based on construction, soil permeability, and ventilation.
See Pennsylvania radon levels and EPA radon zone classifications →
Quick Facts
- Median home value: $234,100 · Median year built: 1938
- Population: 5,247
- Foundation types: Full basement (predominant in borough and suburban homes); Stone foundation (historic Federal- and Victorian-era downtown homes); Crawlspace (converted outbuildings and Bucknell-area rentals)
Union County Context
Lewisburg is a municipality of Union County, EPA Zone 1. Zone designation is assigned at the county level, so Lewisburg inherits its classification; countywide aggregate figures live on the county page.
See Union County radon aggregate data →Measured Radon Data for Lewisburg
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
Radon Mitigation Cost in Lewisburg
Active sub-slab depressurization (ASD) systems in Lewisburg typically cost $895–$2,400. Standard basement installs on modern poured concrete fall at the lower end; historic foundations, block-wall depressurization, multi-point suction, and crawlspace encapsulation push costs higher.
Foundations covered locally
- Full basement (predominant in borough and suburban homes)
- Stone foundation (historic Federal- and Victorian-era downtown homes)
- Crawlspace (converted outbuildings and Bucknell-area rentals)
Systems used in the region
- Active sub-slab depressurization
- Sub-membrane depressurization (stone-foundation historic homes)
- Block wall depressurization
Certification & Compliance
All Pennsylvania radon testing and mitigation professionals must hold active PA DEP certification. Ask any contractor for their certification number and verify it before signing.
Pennsylvania's Real Estate Seller Disclosure Law (68 Pa.C.S. §§ 7301–7315) requires sellers to disclose known material defects to buyers under § 7303; the mandated disclosure form records radon under § 7304(b)(14). Sellers who have never tested are not compelled to test — § 7308 imposes no affirmative duty to investigate — but pre-listing testing is standard practice across most PA markets.
Under 25 Pa. Code § 240 — the Pennsylvania chapter governing radon certification — every radon service provider working in the Commonwealth must hold current DEP certification. Verify the contractor's status via the DEP Radon Services Directory before hiring.
Verify Contractor Certification — PA DEP Official Directory for Lewisburg, Union County
View PA DEP Certified Contractor DirectoryThe PA Department of Environmental Protection maintains the official list of certified radon testers and mitigators, sorted by county and updated monthly. Always verify certification before hiring any contractor.
Directory resource provided by PA DEP Bureau of Radiation Protection, Radon Division.
Frequently Asked Questions
How does Lewisburg's geology compare to State College and Carlisle?
Lewisburg sits on the same Ordovician carbonate bedrock that underlies State College's Nittany Valley and Carlisle's Cumberland Valley. All three are Central Pennsylvania Ridge-and-Valley carbonate corridors where trace uranium in limestone and dolomite continuously produces radon and karstic dissolution channels create highly permeable soil-gas pathways. Expect similar risk profiles across these three communities, with variability driven by local fracture density and foundation type.
Should Bucknell-area rental properties in Lewisburg be tested for radon?
Yes. Bucknell University's off-campus rental market includes a significant number of older homes with full basements that serve as student bedrooms, living spaces, or home offices. Landlords bear responsibility for tenant radon exposure under Pennsylvania property standards. Students spending extended hours in below-grade living areas on Zone 1 limestone are at elevated risk. PA DEP recommends testing every rental property in high-radon areas.
Does the West Branch Susquehanna affect radon in Lewisburg?
Not through surface water — waterborne radon is not a material indoor air pathway at municipal treatment scales. But the river-valley topography concentrates cold air drainage, increasing wintertime stack effect in basements. Combined with the carbonate bedrock beneath the valley floor, this produces the seasonal radon elevation patterns characteristic of Central Pennsylvania Ridge-and-Valley communities.
What's the average radon level in Lewisburg?
Lewisburg's DEP-recorded basement average is 7.44 pCi/L across 4,696 tests. The EPA action level for mitigation is 4.0 pCi/L, so a sizable share of Lewisburg homes exceed the threshold. The highest single result in the local dataset is 2902.0 pCi/L; this unusually high reading may reflect a source data anomaly or a single-home outlier — individual home results vary widely.
Do homes in Lewisburg need to be tested for radon?
Union County is EPA Zone 1 — the highest radon-potential classification — so every home in Lewisburg should be tested regardless of age, foundation type, or neighborhood. Short-term charcoal or continuous monitor tests take 48–96 hours and cost $15–$50; long-term alpha-track tests run 90 days and better represent annual averages. If the result meets or exceeds 4.0 pCi/L, mitigation by a DEP-certified professional is recommended.
How much does radon mitigation cost in Lewisburg?
Active sub-slab depressurization (ASD) systems in the Lewisburg area typically cost $895–$2,400. Standard basement installations on modern poured-concrete foundations fall at the lower end; historic foundations, block-wall depressurization, multi-point suction, and crawlspace encapsulation push costs toward the upper end. All work must be performed by a DEP-certified mitigation professional under 25 Pa. Code § 240.
Is radon disclosure required when selling a home in Lewisburg?
Pennsylvania's Real Estate Seller Disclosure Law (68 Pa.C.S. §§ 7301–7315) requires residential sellers to disclose known material defects to buyers (§ 7303). The state-mandated disclosure form covers 'presence of hazardous substances' at § 7304(b)(14) — where any known elevated radon test result or existing mitigation system is recorded. Sellers who have never tested are not required to test: § 7308 imposes no affirmative duty to investigate. In Lewisburg, the practical reality is that most buyers request radon testing during the inspection contingency period. Sellers who test and mitigate before listing eliminate the most common contract contingency and preserve negotiating position.
Which ZIP codes does the Lewisburg radon data cover?
The Lewisburg radon dataset on this page covers ZIP code 17837. These are the ZCTAs assigned to Lewisburg in the Census 2020 ZCTA-to-Place relationship file and used for the PA DEP RadonZip Tool aggregation. Neighboring ZIP codes belong to adjacent municipalities and appear on their own PA Radon Hub pages.
Are Lewisburg Area School District buildings subject to SB 760?
Union County is in EPA Zone 1 and is served by 4 school districts, including Lewisburg Area School District. Pennsylvania Senate Bill 760, if enacted as drafted, would apply to all public school buildings in Union County regardless of which district operates them. The bill remains in committee. Buildings in Zone 1 counties like Union County would be highest priority under the proposed framework. If SB 760 is enacted, mitigation timelines, thresholds, and qualifying buildings would be set by the final bill text and any subsequent DEP implementing regulations. PA Radon Hub tracks this legislation; specific deadlines remain pending.
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