SWAT Environmental
Certifications: NRPP; AARST member; on the PA DEP certified-mitigator list
National radon company with a south-central Pennsylvania operation and a York service page with a local number. Offers radon testing, mitigation system design and installation, diagnostics and new-construction systems for homes, commercial buildings and real-estate transactions. Its York page says it serves all of York County. Cites NRPP certification and AARST membership; the DEP list shows SWAT of PA as a certified mitigation firm.