Radon Mitigation in Clearfield
Moderate radon risk from Pennsylvanian sandstone and shale of the bituminous coal field on the Appalachian Plateau. Clearfield sits on the West Branch Susquehanna where Pennsylvanian coal measures and underlying Mississippian formations contain variable uranium concentrations. Unlike the anthracite fields of northeast PA, the bituminous coal region's broader geology and thicker soil cover generally moderate radon levels — but fractured zones and former surface mining areas create localized elevation.
High Radon Risk Area
Clearfield sits in EPA Zone 1 — testing is recommended for every home regardless of age or foundation type.
Local Geology & Risk Factors
Clearfield is located in an area with Appalachian Plateau / Pennsylvanian Sandstone-Shale Coal Measures 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: $100,800 · Median year built: 1949
- Population: 5,918
- Foundation types: Basement (predominant in borough homes); Block foundation (mid-century housing); Crawlspace (hillside and rural homes)
Clearfield County Context
Clearfield is a municipality of Clearfield County, EPA Zone 1. Zone designation is assigned at the county level, so Clearfield inherits its classification; countywide aggregate figures live on the county page.
See Clearfield County radon aggregate data →Measured Radon Data for Clearfield
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 Clearfield
Active sub-slab depressurization (ASD) systems in Clearfield typically cost $850–$2,150. 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
- Basement (predominant in borough homes)
- Block foundation (mid-century housing)
- Crawlspace (hillside and rural homes)
Systems used in the region
- Active sub-slab depressurization
- Block wall depressurization
- Sub-membrane depressurization (crawlspace)
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 Clearfield, Clearfield 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 the bituminous coal field affect radon in Clearfield?
Clearfield sits in the bituminous coal region of the Appalachian Plateau, where Pennsylvanian sandstone, shale, and coal seams contain variable uranium concentrations. Unlike the anthracite fields of northeast PA, the bituminous region's geology is less intensely fractured and typically has thicker soil cover, moderating overall radon levels. However, areas disturbed by surface mining or underlain by fractured bedrock can have significantly elevated concentrations.
Does former surface mining increase radon risk in the Clearfield area?
Former surface mining can increase radon risk by removing overlying soil and rock that previously buffered radon migration, fracturing underlying bedrock during extraction, and creating backfilled areas with high permeability. Homes built on or near reclaimed mining land in Clearfield County should be tested even if the broader area has moderate average radon levels.
What does radon mitigation cost in Clearfield?
Clearfield area radon mitigation typically costs $850–$2,150. Properties on former mining land may require extended diagnostic testing. The lower cost range reflects the area's smaller average home sizes and moderate radon levels. Request quotes from DEP-certified Clearfield County contractors.
What's the average radon level in Clearfield?
Clearfield's DEP-recorded basement average is 7.03 pCi/L across 802 tests. The EPA action level for mitigation is 4.0 pCi/L, so a sizable share of Clearfield homes exceed the threshold. The highest single result in the local dataset is 276.0 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 Clearfield need to be tested for radon?
Clearfield County is EPA Zone 1 — the highest radon-potential classification — so every home in Clearfield 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 Clearfield?
Active sub-slab depressurization (ASD) systems in the Clearfield area typically cost $850–$2,150. 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 Clearfield?
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 Clearfield, 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 Clearfield radon data cover?
The Clearfield radon dataset on this page covers ZIP code 16830. These are the ZCTAs assigned to Clearfield 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 Clearfield Area School District buildings subject to SB 760?
Clearfield County is in EPA Zone 1 and is served by 9 school districts, including Clearfield Area School District. Pennsylvania Senate Bill 760, if enacted as drafted, would apply to all public school buildings in Clearfield County regardless of which district operates them. The bill remains in committee. Buildings in Zone 1 counties like Clearfield 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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