The Septic GuideLicensed septic pros
List Your Business
North Kingstown, Rhode Island

Licensed Septic Companies in North Kingstown, RI

21 septic companies serve North Kingstown, Rhode Island, and 21 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).

21 septic companies in North Kingstown

  • Alfred Cole Jr.

    771 Lafayette Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0299 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 255-1832

  • Denali Corp.

    43 Barolay Drive, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1943 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 300-9716

  • Denali Corp.

    43 Barolay Drive, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1956 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 400-7900 denaliri.com

  • Frank N Passarella

    375 Earl Drive, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1641 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 942-4943

  • Harry Cole

    1220 LaFayette Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0259 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-9450

  • LMD Construction

    1254 Tower Hill Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1254 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-3786

  • Michael A Netro

    169 Hideaway Lane, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1362 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 474-8926

  • Michael D Cesaro

    3 Buena Vista Drive, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1002 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 232-5192

  • MM Contracting

    481 Lafayette Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0497 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-0555

  • Post Road Park

    6200 Post Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1838 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 885-4150

  • Richard D Delfino

    44 Cross Park Avenue, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0741 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 295-1500

  • Robert E DeBlois Jr.

    420 ScrabbletownRoad SuiteG, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1086 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 268-5357

  • Sean P Grundy

    318 Dry Bridge Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1435 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 255-1026

  • Steve Allen

    143 Essex Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0526 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 885-0059

  • T. Miozzi, LLC

    80 Compass Circle, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0491 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 632-6657 peckham.com

  • Thomas F Mello

    50 Stony Lane, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1491 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-9426

  • Timothy P Mahoney

    230 Dry Bridge Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1102 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-1875

  • Town of North Kingstown

    2050 Davisville Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1772 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 268-1500

  • William Anthony Excavating Inc

    3666 Quaker Ln, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0989 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-2320 waexcavating.com

  • William E Ronci

    245 Shore Acres Ave., North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1583 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-8111

  • William W Bunker

    270 Boston Neck Road, North Kingstown, RI 02852 · Washington County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1548 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 749-7532

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 North Kingstown 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 North Kingstown: common questions

How many licensed septic companies are in North Kingstown, RI?

21 septic companies serve North Kingstown, Rhode Island, and 21 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 North Kingstown?

21 listings in North Kingstown 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.