Radon Mitigation in Butler
High radon potential. Glaciated Pittsburgh Plateau geology with Pleistocene till deposits over uranium-bearing Pennsylvanian bedrock drives sustained indoor radon across Butler County.
High Radon Risk Area
Butler sits in EPA Zone 1 — testing is recommended for every home regardless of age or foundation type.
Local Geology & Risk Factors
Butler is located in an area with Appalachian Plateau / Glaciated Pittsburgh Plateau 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: $112,500 · Median year built: 1938
- Population: 13,306
- Foundation types: Basement (most common); Crawlspace (moderate); Slab-on-grade (varies)
Butler County Context
Butler is a municipality of Butler County, EPA Zone 1. Zone designation is assigned at the county level, so Butler inherits its classification; countywide aggregate figures live on the county page.
See Butler County radon aggregate data →Measured Radon Data for Butler
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 Butler
Active sub-slab depressurization (ASD) systems in Butler typically cost $950–$2,200. 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 (most common)
- Crawlspace (moderate)
- Slab-on-grade (varies)
Systems used in the region
- Active sub-slab depressurization
- Sump pit depressurization
- Passive soil 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 Butler, Butler 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
Why is radon a concern in Butler, PA?
Butler sits on the glaciated Pittsburgh Plateau, where Pleistocene till caps uranium-bearing Pennsylvanian shale and coal measures. The combination produces both diffuse soil-gas radon and concentrated pathways through fractured bedrock. EPA Zone 1 classification reflects this elevated baseline.
What does radon mitigation cost in Butler County?
Most Butler County mitigation systems run $950–$2,200 installed. Active sub-slab depressurization is the dominant approach for the basement-heavy housing stock around Butler, Cranberry Township, and Slippery Rock. DEP-certified contractors provide free quotes.
Does Cranberry Township have higher radon than Butler proper?
Both fall in EPA Zone 1 with similar baseline risk, but housing age and foundation type matter more than micro-location. Cranberry's newer subdivisions often have passive radon piping already installed; activating the system with a fan typically costs $250–$600.
What's the average radon level in Butler?
Butler's DEP-recorded basement average is 9.04 pCi/L across 5,477 tests. The EPA action level for mitigation is 4.0 pCi/L, so a sizable share of Butler homes exceed the threshold. The highest single result in the local dataset is 501.1 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 Butler need to be tested for radon?
Butler County is EPA Zone 1 — the highest radon-potential classification — so every home in Butler 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 Butler?
Active sub-slab depressurization (ASD) systems in the Butler area typically cost $950–$2,200. 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 Butler?
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 Butler, 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 Butler radon data cover?
The Butler radon dataset on this page covers ZIP codes 16001 and 16002. These are the ZCTAs assigned to Butler 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 Butler Area School District buildings subject to SB 760?
Butler County is in EPA Zone 1 and is served by 9 school districts, including Butler Area School District. Pennsylvania Senate Bill 760, if enacted as drafted, would apply to all public school buildings in Butler County regardless of which district operates them. The bill remains in committee. Buildings in Zone 1 counties like Butler 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.
Connect with a DEP-Certified Radon Pro in Butler
Submit your request and we will connect you with a DEP-certified professional serving Butler County.
(717) 461-2427Connect with a DEP-certified radon pro