Licensed Septic Companies in Baltimore County, MD
43 septic companies serve Baltimore County, Maryland, and 40 of them hold a Maryland septic license or certification matched to the Maryland Department of the Environment list (data as of October 2026).
Septic services in Baltimore County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost
43 septic companies in Baltimore County
Towson 5
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Baltimore CHD
111 W. Chesapeake Ave, Towson, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Baltimore County
111 W Chesapeake Ave, Towson, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Ca Taciak & Sons
9 Edgeview Rd, Towson, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Home Land Environmental
1220 E Joppa Rd C505, Towson, MD 21286
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Inspection Per state license: Installation · Aerobic systems
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C.A. Taciak & Sons
9 Edgeview Rd, Towson, MD 21286
From their website: Installation · Inspection · Repair
White Marsh 4
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Gast Construction Co Inc
11100 Pulaski Hwy, White Marsh, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Good Shephard Septic Service
11435 Red Lion Rd, White Marsh, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Lee Foundation Co, Inc
10039 Pulaski Hwy, Po Box 211, White Marsh, MD 21220
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Bel Air Septic Service
11412 Pulaski Hwy Unit C, White Marsh, MD 21162
From their website: Pumping · Installation · Repair · Drain field · Grease traps
Cockeysville 3
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Redford Excavating LLC
26 Hillside Avenue, Cockeysville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Redford Excavating LLC
26 Hillside Avenue, Cockeysville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Joseph S. Gray
10918 Hollow Road, Cockeysville, 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
Reisterstown 3
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George C Cowman Jr Inc
1103 Nicodemus Rd, Reisterstown, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Harry G Shaneybrook Inc
144 Westminster Rd, Reisterstown, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Mathena Septic Tank Services Inc
Main St, Reisterstown, MD 21136
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Pumping · Installation · Inspection · Repair · Drain field Per state license: Aerobic systems
Baltimore 2
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Mitchell Plumbing And Heating
11650 Eastern Avenue, Baltimore, MD 21220
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Tech Contracting Co Inc
4000 Hudson Street, Baltimore, MD 21224
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Catonsville 2
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Creative Builds, LLC
5 America Ct, Catonsville, MD 21227
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Valley Road Enterprises, LLC
5443 Valley Rd, Catonsville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Freeland 2
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Blevins & Sons Septic Service
2618 Beckleysville Rd, Freeland, MD 21053
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Pumping · Installation · Inspection · Repair · Risers & lids · Grease traps Per state license: Aerobic systems
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Maryland Concrete, Inc.
21616 Fork Road, Freeland, MD 21053
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Grease traps Per state license: Installation · Aerobic systems
Glen Arm 2
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Groom'S Inc.
Hannibal Ln, Glen Arm, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Sample Excavating
11525 Hannibal Rd, Glen Arm, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Kingsville 2
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Kenneth E Kahl
11815 Reynolds Road, Kingsville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Suburban Cont Co, Inc
7501 Shipley Lane, Kingsville, MD 21087
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Monkton 2
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Cross Timbers Utility
4058 Old York Rd, Monkton, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Harris Septic Systems
Po Box 394, Monkton, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Randallstown 2
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Edward L Linsenmeyer Plh
9304 Migan Rd, Randallstown, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Linsenmeyer Excavation
9304 Migan Rd, Randallstown, MD 21133
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Upperco 2
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Cossentino Septic
15411 Dover Rd, Upperco, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
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Cossentino Septic Tank Pumping, Cleaning and Repair
15411 Dover Rd, Upperco, MD 21155
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Pumping · Repair · Drain field Per state license: Installation · Aerobic systems
Fork 1
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Don Smith
12652 Fork Rd, Fork, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Glyndon 1
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Back River Pre-Cast, LLC
Po Box 329, Glyndon, MD 21136
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Great Mills 1
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A & A Construction
Po Box 117, Great Mills, MD 21215
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Gwynn Oak 1
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The Jordon Company
2107 Gwynn Oak Avenue, Gwynn Oak, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Halethorpe 1
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Len The Plumber Heating & Air, LLC
3610 Commerce Dr #808, Halethorpe, MD 21227
From their website: Installation
Hunt Valley 1
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Mosh
10946 Golden West Dr, Hunt Valley, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Middle River 1
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Jro Associates LLC
3337 Edwards Lane, Middle River, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Perry Hall 1
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Philp J Goetz Plumbing & Heating
4942 Silver Spring Rd, Perry Hall, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Phoenix 1
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Sweet Air Plumbing Inc
Po Box 242, Phoenix, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Rosedale 1
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Meadowbrook Water
7410 Rossville Blvd, Rosedale, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Westminster 1
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Carroll Water Systems Inc
60 Aileron Lane #3, Westminster, MD 21030
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Windsor Mill 1
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MD Building & Landscape
2517 N. Rolling Rd, Windsor Mill, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
No listings match those filters.
Septic licensing 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. The Maryland Department of the Environment issues these credentials: BAT (Best Available Technology) certified installer; County septic installer licenses in some counties.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Baltimore County and whether the permit fee is in their quote.
Maryland septic licensing: agencies, license types and how to check a license →
Septic companies in Baltimore County: common questions
How many licensed septic companies are in Baltimore County, MD?
43 septic companies serve Baltimore County, Maryland, and 40 of them hold a Maryland septic license or certification matched to the Maryland Department of the Environment 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 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. The licensing body is the Maryland Department of the Environment.
Which companies pump septic tanks in Baltimore County?
4 of the 43 listings in Baltimore 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 Baltimore County?
43 listings in Baltimore County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Maryland license.
How do I check a septic contractor's license in Maryland?
Use the Maryland Department of the Environment's lookup (https://mde.maryland.gov/programs/water/BayRestorationFund/OnsiteDisposalSystems/Pages/index.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.