Skip to content
Septic Registry

Licensed septic companies in Portsmouth, Rhode Island

10 businesses on Rhode Island’s septic licensing records give an address in Portsmouth. Portsmouth is in Newport County, which has 31 in total.

More licensed companies elsewhere in Newport County

A Rhode Island licence is valid statewide. These are based in the same county but a different town, and can legally work in Portsmouth.

Septic licensing in Portsmouth

How many licensed septic companies are there in Portsmouth?
10 businesses give Portsmouth as their address on Rhode Island's septic licensing records. That count is of businesses based in Portsmouth, not of everyone who will work there — a Rhode Island licence is valid across the state.
Do I have to use a company based in Portsmouth?
No. Licensing is statewide, so any licensed company can legally work in Portsmouth. Newport County has 31 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 Portsmouth 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 RIDEM's OWTS professional licensing office.

Other towns in Newport County

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