GroundRosterWilliam L MastroLicensed
| Name | William L Mastro |
| License number | 32.003909 |
| License type | Sub-Surface Sewage Cleaner |
| License status | Active |
| License expires | 2027-09-30 |
| Location | Newtown, Connecticut 06470 |
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How to verify this license
We publish this listing exactly as it appears in Connecticut's official licensing records; we do not vouch for the business itself. Before hiring, look up license #32.003909 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Connecticut DPH - eLicense credential extract (well & septic license types), last checked 2026-08-17. Verify at the official source.
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