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Rhis, INC.

Licensed Contractor

2 licensed radon professionals on record, under the PA radon program.

Address
100 Old Kennett Rd
Wilmington, DE
Phone
(302) 993-9100
Licensed in
PA

Licensed professionals at this business

LicenseeLicense typeNumberState
—Certified Mitigation FirmPA-1883PA
Kerrigan, JohnCertified Mitigation FirmPA-1882PA
Source & verification

This record was pulled from the official state roster listed below. Licenses can lapse, transfer, or be revoked after the date we pulled them (last pull: 2026-08-05). Always confirm current license status directly with the state agency before hiring.

  • Pennsylvania DEP Radon Division - Certified Mitigation Firms · pulled 2026-08-05 Official lookup

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