ProfessionalsBusiness profile
Rhis, INC.
Wilmington, Delaware. Testing and mitigation
11 Pennsylvania state licenses verified against the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection list, last checked October 4, 2026.
Credentials
Licenses and certifications
11 credentials are on file for this business, each exactly as the issuer's list printed it.
These are Pennsylvania licenses, and the business address is in Delaware.
Radon411 has no Delaware record for this business. Before hiring it for a home in Delaware, check what Delaware asks for. What Delaware requires
Pennsylvania state licenses (11)
Issued by the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection, not by NRPP or NRSB. Radon411 last checked the list on October 4, 2026. No expiry date is on the record.
Licensing in Delaware
Ask Delaware Division of Public Health Radon Office what it requires before you hire.
Delaware Division of Public Health Radon Office
Delaware Division of Public Health
Its page covers free or discounted test kits.
Phone 1-800-464-HELP
Visit the program's page (opens in a new tab)Read October 3, 2026
Nearby
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