GroundRosterMark PiontkowskiLicensed
| Name | Mark Piontkowski |
| License number | 33.003451 |
| License type | Sub-Surface Sewage Installer |
| License status | Active |
| License expires | 2027-06-30 |
| Location | Middletown, Connecticut 06457 |
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What this license covers
- Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
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 #33.003451 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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