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Septic Registry

Licensed septic companies in New Castle, Delaware

4 businesses on Delaware’s septic licensing records give an address in New Castle. New Castle is in New Castle County, which has 38 in total.

3 licensed liquid waste haulers1 licensed system designers

More licensed companies elsewhere in New Castle County

A Delaware licence is valid statewide. These are based in the same county but a different town, and can legally work in New Castle.

Septic licensing in New Castle

How many licensed septic companies are there in New Castle?
4 businesses give New Castle as their address on Delaware's septic licensing records. That count is of businesses based in New Castle, not of everyone who will work there — a Delaware licence is valid across the state.
Do I have to use a company based in New Castle?
No. Licensing is statewide, so any licensed company can legally work in New Castle. New Castle County has 38 in total, and companies in neighbouring counties can travel too. Being local usually matters for call-out speed and price, not permission.
How do I check a New Castle septic company is really licensed?
Every listing here names the record it came from and the date that record was published. To confirm it is still current, check with DNREC, or the state's own licensee dataset.

Other towns in New Castle County

Records as published August 26, 2026. Report a correction.