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Maryland

Licensed Septic Companies in Maryland

The Septic Guide lists 1,029 septic companies and licensed septic professionals in Maryland; 1,012 are matched to the Maryland Department of the Environment license or certification lists (data as of October 2026).

1,029listed in Maryland
1,012matched to a state license or certification
930with a phone number
38county and town pages

Septic companies by county

Septic companies by city

Licensed company profiles in Maryland

Septic services in Maryland

Counts of Maryland listings by service, from each business's own website or the type of state license it holds.

  • 51 septic tank pumping · guide
  • 1,022 septic system installation · guide
  • 29 septic inspection · guide
  • 38 septic repair · guide
  • 27 drain field repair · guide
  • 1,014 aerobic septic systems · guide
  • 17 risers and lids
  • 24 perc testing and site evaluation
  • 27 grease trap pumping

Who licenses septic work in Maryland?

Maryland certifies installers of nitrogen-reducing BAT septic units; installers also need the unit maker's certification, and some counties require a local license.

Credentials: BAT (Best Available Technology) certified installer; County septic installer licenses in some counties.

Agency: Maryland Department of the Environment.

Licenses shown in this directory come from: Maryland Department of the Environment (1,012).

Maryland septic licensing guide →

Other Maryland listings

Septic companies and licensed professionals in areas without their own page yet. Listings in the counties and towns above are on those pages.

Annapolis Junct 1

  • Md Water Conditioning Inc

    10983-E Guilford Rd, Annapolis Junct, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 792-0327

Belair 2

  • Jrl Inc

    2209 Lyns Court, Belair, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 808-6785

  • Jrl Inc

    2209 Lyns Court, Belair, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 807-6271

Centerville 2

  • Middleton Construction Co, LLC

    200 Sparks Mill Rd, Centerville, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 758-2857

  • Utkewicz Land Mgmt.

    1115 4H Park Rd, Centerville, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 239-5684

Chance 1

  • Jones Site Work

    23292 Haines Point Rd, Chance, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 783-0121

Chestertwon 1

  • Harrys Septic Installation, Inc

    105 Laurel Ct, Chestertwon, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 778-4141

Cresaptown 1

  • Don Harden Excavating

    14400 Brant Rd, Cresaptown, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 729-3537

Dunkkirk 1

  • Cl Smith Co., Inc

    3413 Lyons Creek Rd, Dunkkirk, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 399-4300

Flinstone 2

  • Mid-State Pest Control

    Po Box 79, Flinstone, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 777-3899

  • Teter Landscaping Inc

    14208 Dry Ridge Rd, Flinstone, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 724-7160

Hobnail Ct 1

  • Classic Plumbing Inc

    5806, Hobnail Ct, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 695-7934

Jarretsville 1

  • Chavis Enterprises LLC

    3811 Federal Hill Rd, Jarretsville, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 940-9377

Keynar 1

  • C.R. Kline Excavating

    11054 Haughs Church Rd, Keynar, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (340) 636-3564

Landover 2

  • K Hovnanian Homes

    1802 Brightseat Road, Landover, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (310) 683-6291

  • K. Hovnanian Homes

    1802 Brightseat Rd, Landover, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 683-6272

Largo 1

  • Pg Chd

    9201 Basil Ct, Largo, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 883-7655

Laytonsville 1

  • King & Sons Inc

    8605 Augusta Farm La, Laytonsville, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 824-4218

Location not listed 85

  • Bjw Enterprises LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 613-5044

  • Ewald Schwarzeneg

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (518) 965-1203

  • Ronald A Griffin

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 975-2073

  • Vester Light Hauling

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 884-5357

  • AJK hauling

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Alex Davis

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Belho

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Bessie C Bowman

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Briguglio Plumbing And Gas LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Bucklen

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Carnes I & E

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Charles Bockriter

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Charles F Rash

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Cranston Construction Services LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Cullison Excavating

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Daye'S Excavation LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Diana Pelletier

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Dickerson

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Donald Willey

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Dustin B Sipes

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Dye Property Services llc

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Earl E Preston Jr inc & Whiteford Septic

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Elite Plumbing & Home Services

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Elizabeth Cambridge

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Faris Mustafa

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Fayig Mustafa

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Franco Smiroldo

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Frank Holland

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • G L Shannon Equipment services

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • G. Howard Burch

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Ger

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Graafeiland

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Greg's excavating & Utilities

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Gunpowder Excavation LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Harper & Sons Inc

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • II

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jacey Brooks

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • James R Johnson

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jason Berry

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jeb Deickman

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jeffrey Palmore

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jessy Handy

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • JLP Civil INC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Joe Mclosky

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • John Barhart

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • John Mckaster

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jonathan Pelletier

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Jones Pump Service

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Joseph A Bowles

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Joseph Cabahuq

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Joseph Price

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Kevin Hugel Sr

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Kmb Land Management

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Kyle Lannen

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Luke Stirparo

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • M&M Land Management

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Mark Williams

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Mary Phipps-

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Mdh

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Murray Underground services

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Nd

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Neil L Cerarol

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Old Line septic LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Paul Ache

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Peter D Resh

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Philip Martinels

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Phillips Property Solutions LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Raymond Phipps-

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Rj'S Plumbing & Septic

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Roger W Mullenax

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Roland J Toye

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Samuel Cahall

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Self

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Severn Landscaping LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Shoemaker Excavating

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Sr

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Steven A Yinger

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Tommy Wilkins

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Turd Burglar LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Veteran Construction services

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Waynes Drains & Septic Service LLC

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • William Derickson V

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • William Jacob

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Windsor Enterprise

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

  • Yates Contracting

    MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

Marburg 1

  • Sonny Septic

    4840 Pisgah Marbury Rd, Marburg, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 743-5260

Mchenry Rd 1

  • Spiker Brothers Inc

    5 Normans Way, Mchenry Rd, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 387-6142

Mt Lake Park 1

  • E-Z Excavating

    514 E Street, Mt Lake Park, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 334-2940

Northeast 1

  • D L Poarch Excavating

    345 Wheatley Rd, Northeast, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 350-7324

Owings Mill 1

  • Burgemeister-Bell, Inc

    10331 S Dolfield Rd, Owings Mill, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 363-0880

Pocomoke 3

  • C.I.D. Excavation

    2240 Ward Rd, Pocomoke, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 208-8969

  • Robert A Benak

    2291 Worcester Hwy, Pocomoke, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 235-5101

  • T & T Construction

    4408 Jones Rd, Pocomoke, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 880-0534

Proncess Anne 2

  • Bozman Sand & Gravel

    10515 Stewart Neck Rd, Proncess Anne, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 783-1988

  • James A Briddell & Son Inc

    Po Box 339, Proncess Anne, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 651-1588

Queenstwon 1

  • Michael A Sipes Plumbing, Inc

    333 Bryce Rd, Queenstwon, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 758-2346

Reisterstwon 1

  • Dwn Enterprises II LLC

    138 Hammershire Road, Reisterstwon, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 596-9623

Riviere-Du- Loup,Qc,Canada 1

  • Premier Tech

    1 Avenue Premier, Riviere-Du- Loup,Qc,Canada, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (804) 238-2638

Sausage 1

  • T & R Plumbing And Heating Inc

    P.O. Box 345, Sausage, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (301) 725-0031

St Michael 1

  • St Michaels Ventures LLC

    P.O. Box 571, St Michael, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 745-5292

St Michaels 2

  • St Michaels Ventures, LLC

    Po Box 571, St Michaels, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 924-5267

  • St Michaels Ventures LLC

    St Michaels, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    No phone on the state list

St. Leonard 2

  • Duncan Home Improvement Services LLC

    1960 Sandcastle Ln, St. Leonard, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (443) 975-3051

  • Smitty'S Backhoe & Septic Service

    10210 Mackall Road, St. Leonard, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 586-2646

Stillpond 1

  • Kw Matthews Electric, Plumbing & Hvac

    13744 Stillpond Rd, Stillpond, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 648-2200

Timonium 1

  • Elk Dev Copr

    P.O. Box 5075, Timonium, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (410) 561-2445

Wheaton 1

  • Montgomery Co DPS

    2425 Reedie Dr., Wheaton, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (240) 777-6358

Whitehall 1

  • BelHo LLC

    4990 Jolly Acres rd, Whitehall, MD

    • Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)

    Per state license: Installation · Aerobic systems

    (717) 515-1430

Septic companies in Maryland: common questions

How many licensed septic companies are in Maryland?

The Septic Guide lists 1,029 septic companies and licensed septic professionals in Maryland; 1,012 are matched to the Maryland Department of the Environment license or certification lists (data as of October 2026). 930 have a phone number listed; the others appear on the state list without one.

Do septic contractors need a license in Maryland?

Yes. Maryland certifies installers of nitrogen-reducing BAT septic units; installers also need the unit maker's certification, and some counties require a local license.

How do I check a septic license in Maryland?

Search the contractor on the Maryland Department of the Environment's lookup (https://mde.maryland.gov/programs/water/BayRestorationFund/OnsiteDisposalSystems/Pages/index.aspx). Every license badge in this directory links to the agency's own lookup.