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Ashaway, Rhode Island

Licensed Septic Companies in Ashaway, RI

5 septic companies serve Ashaway, 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 Ashaway

  • Alfred W. DiOrio, RLS, Inc.

    Post Office Box 999, Ashaway, RI 02804 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0662 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 377-8124 awdrls.com

  • Anthony Pelloni

    PO Box 333, Ashaway, RI 02804 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1417 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 323-1551

  • Arm Engineering INC

    PO Box 507, Ashaway, RI 02804 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0856 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 377-0080

  • Excavation & Septic Service

    14 Edgewood Ave, Ashaway, RI 02804 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1708 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 255-8157

  • Ronnie J Sposato

    40 Maxson Hill Road, Ashaway, RI 02804 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0814 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 595-4817

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 Ashaway 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 Ashaway: common questions

How many licensed septic companies are in Ashaway, RI?

5 septic companies serve Ashaway, 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 Ashaway?

5 listings in Ashaway 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.