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Portsmouth, Rhode Island

Licensed Septic Companies in Portsmouth, RI

21 septic companies serve Portsmouth, 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).

Septic services in Portsmouth

Guides: Septic system installation · Septic repair · Drain field repair · Installation cost · Pumping cost

21 septic companies in Portsmouth

  • .

    104 Bayview Ave, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1945 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 835-1142

  • 13 Narragansett Ave

    75 Park Avenue, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1847 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 829-3651

  • All Island Landscape Inc

    2829 East Main Road, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1861 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1860 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1939 (Rhode Island Department of Environmental Management, verify)

    From their website: Installation · Repair

    (401) 445-8953 allislandlandscape.com

  • Aquidneck Landscape Service

    72 Kerr Rd, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1963 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 862-9553

  • Aquidneck Services LLC

    113 Hilltop Drive Portmouth, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1923 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 524-4134 facebook.com

  • Brian D Woodhead

    11 Ann Ave, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1672 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 682-1370

  • Daniel P Woods

    906 Anthony Road, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1845 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 835-5501

  • David J Zygiel Jr.

    33 Cedar Ave, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1804 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 499-3955

  • David Kehew

    143 Hedly Street, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0841 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 683-0362

  • DeCastro Excavating

    997 Middle Road, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1895 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 265-3139

  • E J Excavating Lllc

    77 Camara Dr, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1693 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 682-2172 ejexcavating.com

  • Edward T Lopes Jr.

    P.O. Box 294, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0927 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 842-9231

  • J.A.M. Construction Co,Inc.

    202 Chase Road Porstmouth, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1616 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1405 (Rhode Island Department of Environmental Management, verify)

    From their website: Drain field Per state license: Installation

    (401) 683-5656 jamconstruction.com

  • Joel W Camara

    155 Schoolhouse Ln, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1176 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 265-3364

  • Main Drain Septics, LLC

    32 Stubtoe Lane, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1368 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 683-5887

  • Main Street Construction

    PO Box 331, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1854 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 862-9800

  • Newport Septic and Constructioniello's Excavation LLC.

    Po Box 22, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1955 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 236-4805

  • Piece Anthony Farm, LLC

    2503 East Main Road, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1900 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 847-7090

  • PJR Construction

    PO Box 898, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1907 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 683-1804

  • Right Choice Landscaping

    173 Heidi Drive, Portsmouth, RI 02871 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1521 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 683-5207

  • William G Silvia

    0341 Mt. Pleasant Ave., Portsmouth, RI 02872 · Newport County

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1409 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (617) 592-2215

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 Portsmouth 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 Portsmouth: common questions

How many licensed septic companies are in Portsmouth, RI?

21 septic companies serve Portsmouth, 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 Portsmouth?

21 listings in Portsmouth 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.