PA HB289

Requires all existing school buildings in Pennsylvania to be tested for radon gas beginning in the 2026-2027 school year, with mitigation required if levels reach or exceed 4 picocuries per liter of air

Mandates retesting every 5 years for buildings with acceptable radon levels, or every 2 years for buildings that previously tested at or above the 4 picocuries threshold

Requires all radon testing and mitigation to be performed by individuals certified under Pennsylvania's Radon Certification Act, following ANSI-AARST protocols

Obligates school entities to report testing results, mitigation plans, and post-mitigation results within 60 days through public meetings, website postings, and submissions to state agencies including the Department of Environmental Protection

Requires new school buildings to be constructed using radon-resistant techniques according to ANSI-AARST CC-1000 standards, with the act taking effect 120 days after enactment