Rhis, INC.
Licensed Contractor2 licensed radon professionals on record, under the PA radon program.
Rhis, INC. is based in Wilmington, DE but holds its radon license in PA, not in Delaware. Contractors licensed across a state line are common near borders and in metro areas that span one, but it is worth asking about travel and scheduling before you book.
The state roster lists 2 licensed individuals under this business holding Certified Mitigation Firm licenses. A larger licensed roster usually means the company can schedule around a closing date rather than putting you in a queue behind one technician.
Every license on record here is for mitigation, meaning installing the system. If you still need the house tested first, that is a separate credential and you may need a second provider.
Licensed professionals at this business
| Licensee | License type | Number | State |
|---|---|---|---|
| — | Certified Mitigation Firm | PA-1883 | PA |
| Kerrigan, John | Certified Mitigation Firm | PA-1882 | PA |
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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