Radon Testing & Mitigation in Indiana, PA
High radon potential. Indiana County coal basin geology with uranium-bearing Pennsylvanian shale and reclaimed mine sites contributes to sustained indoor radon across the region.
High Radon Risk Area
Indiana sits in EPA Zone 1 — testing is recommended for every home regardless of age or foundation type.
Radon Testing in Indiana
In Indiana-area ZIP codes, 46% of 5,661 basement tests reported to PA DEP measured 4.0 pCi/L or higher, with a median of 3.6 pCi/L. Readings differ from house to house, so each home needs its own test. Start with a short-term test of 48–96 hours on the lowest lived-in level. A long-term test of 90 days or more averages out seasonal swings.
A result at or above EPA's 4.0 pCi/L action level calls for a confirming test or mitigation. Retest after a mitigation system goes in, and at least every two years from then on. Pennsylvania requires DEP certification for anyone who tests as a paid service; you may test your own home with a kit from a DEP-certified laboratory. For a home sale, read the Pennsylvania real estate radon testing guide.
Local Geology & Risk Factors
Indiana is located in an area with Appalachian Plateau / Indiana County Coal Basin 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: $123,300 · Median year built: 1955
- Population: 14,170
- Foundation types: Basement (most common); Crawlspace (moderate); Slab-on-grade (varies)
Indiana County Context
Indiana is a municipality of Indiana County, EPA Zone 1. Zone designation is assigned at the county level, so Indiana inherits its classification; countywide aggregate figures live on the county page.
See Indiana County radon aggregate data →Measured Radon Data for Indiana
These figures cover every test whose ZIP code is listed above. ZIP codes do not follow municipal lines, so the figures describe Indiana-area ZIP codes, not the municipal boundary of Indiana. They count tests, not homes.
Source: PA Department of Environmental Protection, Radon Test Results, data.pa.gov. Tests through July 2026. Retrieved September 29, 2026.
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Radon Mitigation Cost in Indiana
Active sub-slab depressurization (ASD) systems in Indiana typically cost $900–$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 Indiana, Indiana 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 elevated in Indiana, PA homes?
Indiana County sits in the heart of the Pennsylvanian coal basin, where uranium-bearing shale interleaves with bituminous coal seams. Indiana County is EPA Zone 1. 46% of the 5,661 basement tests reported to PA DEP from Indiana-area ZIP codes measured 4.0 pCi/L or higher. Reclaimed mine subsidence can create new soil-gas pathways.
What does radon mitigation cost in Indiana, PA?
Most Indiana County mitigation systems run $900–$2,200 installed. Active sub-slab depressurization is the standard approach. Homes built over former mine workings sometimes require additional sealing of subsidence-related foundation cracks before mitigation can achieve sub-action-level results.
Does living near former coal mining affect radon risk?
Yes — indirectly. Reclaimed mine subsidence creates new soil-gas pathways that allow radon-rich gas from the underlying shale to migrate toward foundations. Homes within 500 meters of historical mine workings should be tested using long-term protocols (90+ days).
What share of radon tests in Indiana-area ZIP codes are at or above the EPA action level?
46% of the 5,661 basement tests reported to PA DEP from Indiana-area ZIP codes measured 4.0 pCi/L or higher, 9 points above the 37% statewide share. The median result is 3.6 pCi/L. Of 442 first-floor tests, 28% measured 4.0 pCi/L or higher. The figures cover the ZIP codes listed on this page, not the municipal boundary, and they count tests, not homes.
Do homes in Indiana need to be tested for radon?
Indiana County is EPA Zone 1 — the highest radon-potential classification — so every home in Indiana 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 Indiana?
Active sub-slab depressurization (ASD) systems in the Indiana area typically cost $900–$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 Indiana?
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 Indiana, 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 Indiana radon data cover?
The Indiana radon dataset on this page covers ZIP codes 15701 and 15705. These are the ZCTAs assigned to Indiana in the Census 2020 ZCTA-to-Place relationship file, and the page counts every test in the PA DEP record on data.pa.gov that carries one of them. A ZIP code can reach into a neighboring municipality, so the figures describe these ZIP codes rather than Indiana's municipal boundary.
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