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Washington County, Rhode Island

Licensed Septic Companies in Washington County, RI

161 septic companies serve Washington County, Rhode Island, and 156 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 Washington County

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

161 septic companies in Washington County

Charlestown 21

  • All-Ready Septic Pumping

    1196 Shannock Rd, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0488 (Rhode Island Department of Environmental Management, verify)

    From their website: Pumping · Repair · Grease traps Per state license: Installation

    (401) 783-0790 allreadyseptic.com

  • Arthur J Frattini

    P.O. Box 90, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0787 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (203) 733-4000

  • Brian K Ennis

    73 Old Coach Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1695 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 218-5328

  • C and V Excavation LLC

    26 Hawks bill Way, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1609 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 473-6203

  • Charles N Botka Jr.

    158 C.Boka Drive, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1245 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-8199

  • Daniel P Joubert Jr.

    9 Wall St, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1791 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 363-5353

  • Glenn R Goguen

    PO Box 811, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1482 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 226-3628

  • James C Tafta

    1189 Warden Pond Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1437 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 486-5727

  • James M Dzwil

    107 Arnolda Round Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1461 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 481-2490

  • JNJ Construction & Excavation LLC

    135 Biscuit City Rd, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0552 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 603-6253

  • Mark N Ready

    1196 Shannock Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1721 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 265-7199

  • Mathew J Dowling

    PO Box 791, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1805 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 309-3893

  • McQuaide & Sons Construction

    351 Ross Hill Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1926 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 226-3098

  • McQuaide M.A.D.E. LLC

    PO Box 755, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1953 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-4639

  • Rick Ringler Backhoe Services

    133 Old Mill Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0606 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 364-2005

  • Sacco Enterprises Inc

    Westerly, Charlestown, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1968 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1456 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0062 (Rhode Island Department of Environmental Management, verify)
    • +1 more credential

    From their website: Installation · Repair

    (401) 322-0368 saccoenterprises.com

  • Septic Preservation RI, Inc.

    319 A West Beach Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1694 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 525-6372

  • Stasiunas Construction, Inc.

    3880 Old Post Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1357 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0830 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 364-0300 stasiunas.com

  • Town of Charlestown

    4540 S. County Trail, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0593 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 364-1230

  • Wood River Industries

    803 Kingsfactory Road, Charlestown, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0672 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 742-3195

  • Westerly Sanitation

    4909 Old Post Rd, Charlestown, RI 02813

    From their website: Pumping · Installation · Inspection · Repair · Grease traps

    (401) 596-7554 westsan.com

Exeter 21

  • Alanson M Roberts

    17 Miskiania Trail, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0805 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 678-6699

  • AllScapes Tree Service - Emergency Tree Removal, Trimming, Installation and Stump Grinding - Exeter, RI Office

    354 S County Trail, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1969 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-3725 allscapestreeri.com

  • Brayman & Sons Excavation Corp.

    125 Black Plain Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1344 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 451-4647

  • Charles R Franklin

    1595 Ten Rod Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1560 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 524-3160

  • David A Allen

    2230 Ten Rod Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1386 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 225-6372

  • David L Skaggs

    71 Raymond Potter, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1829 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-8446

  • Grenco Inc

    35 Raymond Potter Lane, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1614 (Rhode Island Department of Environmental Management, verify)

    From their website: Installation · Repair · Drain field

    (401) 295-9119 grencoexcavation.com

  • Harry Hawker

    227 West Shore Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1658 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 392-1237

  • Howard J Parker

    55 Cedar Grove Drive, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1231 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 633-2370

  • James Taylor

    226 Tripps Corner Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0067 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 640-2231

  • Jeffrey T Mossey

    56 Hemlock Drive, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1624 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 742-0432

  • Jenlee Excavation Services

    269 Skunk Hill Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1234 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 743-0036

  • Kevin R Armstrong

    P.O. Box 343, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0822 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-0445

  • L.A. Patterson, Inc.

    332 South County Trail, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0818 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 295-5121

  • RI Cesspool & RICC Excavation

    315 Nooseneck Hill Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1111 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 529-2418

  • Robert Franklin

    365 Nooseneck Hill Rd., Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0191 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 397-3125

  • Robert L Ferri

    PO Box 208, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1559 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 639-3291

  • Ronald Patalano

    12 Woodbine Lane, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0926 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 295-5347

  • Ronnie's Landscape & Excavation

    1609 Ten Rod Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1433 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 295-0415

  • Waste Away Septic Services

    56 Black Plain Road, Exeter, RI 02822

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1407 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 397-7501

  • Rhode Island Septic Design and Installations, Inc.

    315 Nooseneck Hill Rd, Exeter, RI 02822

    From their website: Installation · Repair

    (401) 601-5180 risepticdesign.com

North Kingstown 21

  • Alfred Cole Jr.

    771 Lafayette Road, North Kingstown, RI 02852

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

    • 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

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

    Per state license: Installation

    (401) 749-7532

Wakefield 17

  • Andrew J Flynn

    182 Red House Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1611 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-0900

  • Brandon Fish

    100 Oakwoods Drive, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1373 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 639-2040

  • Geoffrey N Bouchard

    28 Smith Street, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1891 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 862-2069

  • Johnson Construction, LLC

    707 Broad Rock Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1887 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 644-7907

  • Key Corporation

    170 Fiore Industrial Drive, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1884 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-8583

  • Michael Laflamme

    206 Hampton Way, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1026 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 792-0293

  • Michael R Masson

    73 Kenyon Woods Way, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0718 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 789-4719

  • Northeast Construction Services, Inc.

    319 Post Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1604 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 439-2201

  • Paul J. Flynn Excavating

    180 Red House Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0486 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-4314

  • Philip Mania

    50 Wilderness Trail, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0628 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 301-1828

  • PO Box 338

    697 Moonstone Beach Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1947 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-3569

  • Randy L Quigley

    952 Mooresfield Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1680 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 451-4200

  • Richard G Clark

    711 Kingstown Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1355 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-8844

  • Scott Construction

    100 Shannock Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1116 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 641-5466

  • Steven G Treml

    7 Bayfield Drive, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1674 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 641-7138

  • Suite 46

    393 Sand Trail Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0719 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-0501

  • Timpson Excavating Inc

    96 Rose Hill Road, Wakefield, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1280 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-3031

Westerly 14

  • 111 Danielson Pike

    1 R Bella Vista Terrace, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0443 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 787-7674

  • Andrew Keena & Sons Inc.

    114 Post Road, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1894 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 596-2789

  • Angelo F Pascuzzi

    458 Atlantic Ave., Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1799 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (860) 250-2547

  • Chapman Construction

    79 Old Hopkinton Road, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0180 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 316-3929

  • D'Amato Brothers Builders

    106 Watch Hill Road, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1209 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (203) 877-3276

  • Donald F Spencer

    P.O. Box 1494, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0918 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (860) 885-9955

  • Joseph P Toscano Jr.

    Po Box 2131, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0543 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 596-2824

  • Peter M Fusaro

    41 Yankee Drive, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1736 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 265-3337

  • Richard E Champlin III

    24 Dunns Corner Road, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1754 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 322-7203

  • Thomas W Burdick Jr

    PO Box 1037, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1549 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 364-7262

  • W.S. Gavitt Excavation

    31 B Robin Hollow Lane, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1137 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 864-6968

  • Zanella Plumbing & Heating

    34 Oak Street Westely, Westerly, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0340 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 596-4273 zanellaplumbing.com

  • Macamaux Septic Pumping

    Westerly, RI 02891, Westerly, RI 02891

    From their website: Pumping · Inspection

    (401) 377-4538 macamauxsepticpumping.com

  • Shoreline Sanitation

    235 Westerly Bradford Rd, Westerly, RI 02891

    From their website: Pumping · Inspection · Repair · Risers & lids

    (401) 596-8337 shorelinesanitationri.com

Saunderstown 10

  • Andrew C Smiley Jr.

    2890 Tower Hill Road, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1366 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 641-2263

  • Briggs Septic, Inc.

    112B Stony Fort Rd, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1545 (Rhode Island Department of Environmental Management, verify)

    From their website: Pumping · Installation · Inspection · Repair · Risers & lids

    (401) 783-8104 briggsseptic.com

  • Burnham Excavating, Inc.

    210 Indian Corner Road, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1938 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 580-3656

  • Mumford Services

    160 Railroad Ave, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1458 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0601 (Rhode Island Department of Environmental Management, verify)

    From their website: Pumping · Installation · Inspection · Repair

    (401) 295-8505 mumfordservices.com

  • Richard J Marcello

    2505 Boston Neck Road, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1303 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-2880

  • Robert H Barber

    2271 Tower Hill Road, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1419 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 413-8221

  • Sitework, Inc.

    46 Woodridge Drive, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1037 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 439-7006

  • Superior Septic Service, Inc.

    841 A-1 Mooresfield Road, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1622 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1397 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 789-9360

  • Terri A Gentes

    PO Box 808, Saunderstown, RI 02874

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1961 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 295-3037

  • Superior Septic Service, Inc.

    841A Mooresfield Rd, Saunderstown, RI 02874

    From their website: Installation

    (401) 789-6484 superiorsepticservice.com

Elsewhere in Washington County 8

  • Donald G Gordon

    PO BOX 3242 Narraganseet, RI 02882

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1019 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 623-1145

  • L&M Boisclair Construction, Co.

    3070 South County Trail West Kingstown, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0703 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-7298

  • Michael A Morrone

    118 Boombridge Road Westely, RI 02891

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1376 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 480-2040

  • P.O. Box 1856

    Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1406 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-6328

  • Roger F Chrissos

    25 Fairview Ave Hope Vally, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1600 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 569-1702

  • We Lease It.

    PO Box 7 Peacedale, RI 02883

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1523 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 789-9000

  • William A Coulter

    PO Box 147 Wood River Jct, RI 02894

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1126 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 932-6010

  • Kevin Guarreillo

    102 RoseHill Road Peacedale, RI 02883

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0674 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    No phone on the state list

Hope Valley 8

  • Bruce Brayman

    135 Fairview Ave., Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0881 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 439-1950

  • Charles B Smith Jr.

    34 C Smith Lane, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0318 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 539-2810

  • Daniel W Konuch

    14 Spring Street, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1117 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 559-4102

  • Gary E Brayman

    81 Fairview Ave, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1422 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 523-7135

  • Joseph Soares Jr.

    301 Arcada Road, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0597 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 316-6139

  • RJ Russo Excavating

    121 Woodville Alton Rd, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1957 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 595-5523

  • RJ Russo Excavating, Inc.

    121 Woodville Alton Road, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0576 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 595-5573

  • Robert E Sheldon

    27 Sunset Drive, Hope Valley, RI 02832

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1735 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 480-0048

Block Island 7

  • A. Joseph Sprague

    PO Box 988, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0630 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 466-2885

  • A.Transue Corporation

    PO Box 1558, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1771 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 466-5907

  • Gene A Hall

    911 Coast Guard Road, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1092 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 466-5694

  • Kevin Hoyt Construction LLC

    PO Box1661, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1467 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 375-4201

  • M.Ernst Excavating, Inc.

    Po Box 1015, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1498 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-5710

  • Paul O Filippi

    Post Office Box 967, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1480 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 744-2231

  • Reevco LLC

    Po Box 1984, Block Island, RI 02807

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1868 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 418-2661

West Kingston 6

  • C.D. Kenyon Excavating

    71 Old Usquepaug Road, West Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0627 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 789-0458

  • Carl R Short

    252 Barbers Pond Road, West Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1828 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 793-1525

  • H&R Paving and Excavation

    543 Barbers Pond Rd, West Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1971 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 256-0673

  • Herbert G Dyer

    13 Yawgoo Pond Road, West Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0812 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-6713

  • Ivan L Cindrich

    381c Waites Corner Road, West Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1753 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 743-4457

  • Ridgewood Landscaping

    8 Miranda Drive, West Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1138 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 623-7604

Ashaway 5

  • Alfred W. DiOrio, RLS, Inc.

    Post Office Box 999, Ashaway, RI 02804

    • 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

    • 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

    • 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

    • 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

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

    Per state license: Installation

    (401) 595-4817

Wyoming 4

  • Aiello's Excavation LLC.

    329 Nooseneck Hill Road, Wyoming, RI 02898

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1944 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 408-7751

  • Brendan M Friend

    4 Wildwood Court, Wyoming, RI 02898

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1787 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 742-2988

  • Fox Construction Co., Inc.

    5 Wood Road, Wyoming, RI 02898

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0651 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 487-1983

  • Masoud Shakoori

    P.O. Box 763, Wyoming, RI 02898

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1381 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 439-3127

Bradford 3

  • David Benn Excavation

    160 Ashaway Road, Bradford, RI 02808

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0679 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 644-7602

  • Laing Excavation

    84 Church Street, Bradford, RI 02808

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1918 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (501) 932-2067

  • Professional Drain Services

    288 Bradford Road, Bradford, RI 02808

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1929 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 315-5450

Carolina 3

  • Kevin M Kilduff

    36 Raul Road, Carolina, RI 02813

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1687 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 741-4555

  • L.P. Andrews, Exc.Inc.

    58 Richmond Townhouse Road, Carolina, RI 02812

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0995 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 539-2913

  • L.P. Andrews, Exc.Inc.

    58 Richmond Townhouse Rd, Carolina, RI 02812

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0098 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 539-7531

Richmond 3

  • ALfred Howle

    212 James Trail, Richmond, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1457 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 792-0104

  • James Aragona

    342 Hills Dale Road, Richmond, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1354 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 374-4777

  • Robar Excavation, LLC

    71 Oakland Road, Richmond, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1582 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 539-7171

South Kingstown 3

  • George Sherman Sand & Gravel

    881 Curtis Corner Rd, South Kingstown, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0899 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0788 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 789-6304 shermansandandgravel.com

  • John Stedman & Son Excavation

    140 Stoney Acres Way, South Kingstown, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0665 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0698 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1506 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 789-6322

  • We Dig

    170 Fiore Industrial Dr, South Kingstown, RI 02879

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1818 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 782-1981 wedigcorp.com

Kingston 2

  • David M Rose

    PO Box 332, Kingston, RI 02881

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0993 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 783-9584

  • Todd Smith

    510 Gardner Road West., Kingston, RI 02892

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1367 (Rhode Island Department of Environmental Management, verify)
    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1382 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 294-3039

Narragansett 2

  • James P Manning

    PO Box 3110, Narragansett, RI 02882

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L0711 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 640-2629

  • RI Home Builders

    24 Tern Rd, Narragansett, RI 02882

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1974 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 447-3639

North Scituate 2

  • Frank B Riccio

    15 Stirling Drive, North Scituate, RI 02852

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1630 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 255-7292

  • Sean M MacLeod

    61 Rocky Hill Road, North Scituate, RI 02854

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1466 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 692-0141

West Greenwich 1

  • Kyle S Markhart

    355 Mishnock Road, West Greenwich, RI 02812

    • Licensed: Rhode Island DEM Licensed OWTS (Septic) Installer · #L1717 (Rhode Island Department of Environmental Management, verify)

    Per state license: Installation

    (401) 569-4177

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 Washington County 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 Washington County: common questions

How many licensed septic companies are in Washington County, RI?

161 septic companies serve Washington County, Rhode Island, and 156 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 pump septic tanks in Washington County?

6 of the 161 listings in Washington County offer septic tank pumping, either on their own website or under a state pumper license. Use the service filter above to show only those companies.

Which companies install septic systems in Washington County?

159 listings in Washington County 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.