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East Greenwich, Rhode Island

Licensed Septic Companies in East Greenwich, RI

5 septic companies serve East Greenwich, Rhode Island, and 5 of them hold a Rhode Island septic license or certification matched to the Rhode Island Department of Environmental Management list (data as of October 2026).

5 septic companies in East Greenwich

  • Glen D Johnson

    9 Sawyer Avenue, East Greenwich, RI 02818 · Kent County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1204 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 467-4404

  • Mathew R. Olson

    676 South Road, East Greenwich, RI 02818 · Kent County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0642 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 855-3245

  • Thaddeus Farm

    350 Shippe Rd, East Greenwich, RI 02818 · Kent County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1973 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-9639

  • William J Ross Inc

    P O Box 1821, East Greenwich, RI 02818 · Kent County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1632 (Rhode Island Department of Environmental Management, verify)

    From their website: Installation

    (401) 732-4252 williamjrossinc.com

  • Zarrella Development Corp.

    PO Box 1506, East Greenwich, RI 02818 · Kent County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1285 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1284 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 884-9900 zarrelladevelopment.com

Septic licensing in Rhode Island

Rhode Island licenses septic (OWTS) installers for three-year terms after an exam. The Rhode Island DEM, OWTS program issues these credentials: OWTS installer license (3-year, exam).

Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles East Greenwich and whether the permit fee is in their quote.

Rhode Island septic licensing: agencies, license types and how to check a license →

Septic companies in East Greenwich: common questions

How many licensed septic companies are in East Greenwich, RI?

5 septic companies serve East Greenwich, Rhode Island, and 5 of them hold a Rhode Island septic license or certification matched to the Rhode Island Department of Environmental Management list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.

Who licenses septic contractors in Rhode Island?

Rhode Island licenses septic (OWTS) installers for three-year terms after an exam. The licensing body is the Rhode Island DEM, OWTS program.

Which companies install septic systems in East Greenwich?

5 listings in East Greenwich install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Rhode Island license.

How do I check a septic contractor's license in Rhode Island?

Use the Rhode Island DEM, OWTS program's lookup (https://dem.ri.gov/environmental-protection-bureau/water-resources/professional-licensing/owts-professional-licensing) and search the contractor's name or license number. Our guide to checking a septic license walks through it.