Licensed Septic Companies in Montgomery County, MD
29 septic companies serve Montgomery County, Maryland, and 28 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 Montgomery County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost
29 septic companies in Montgomery County
Damascus 4
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Bennett Excavation
28630 Clarksburg Road, Damascus, 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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Environmental Septic & Waste Services Inc
Po Box 466, Damascus, 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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Moxley Backhoe
28920 Kemptown Rd, Damascus, 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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Reise Enterprises Inc
Po Box 505, Damascus, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Gaithersburg 4
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Casey Jones Enterprises
7560 Lindbergh Dr, Gaithersburg, MD 20879
- 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 Hands Construction
8319 Warfield Road, Gaithersburg, 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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King & Sons Septic Service, LLC
8605 Augusta Farm Ln, Gaithersburg, MD 20882
- 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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Witmer Associates, LLC
18401 Woodfield Rd, Gaithersburg, MD 20879
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Clarksburg 3
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Ben Lewis Plumbing
23407 Frederick Rd, Clarksburg, MD 20871
- 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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M Zuckerman Contracting, LLC
23219 Stringtown Rd #260, Clarksburg, 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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R & P Backhoe Services
23728 Stringtown Rd, Clarksburg, MD 20871
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Poolesville 3
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Charles H Jamison Inc
19939 Fisher Ave, Poolesville, MD 20837
- 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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Eglobal Initiatives LLC
20405 Whites Ferry Rd, Poolesville, 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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Ogden Construction
Po Box 1021, Poolesville, MD 20837
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Sandy Spring 3
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Bacon
18553 Brooke Road, Sandy Spring, 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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Bacon Co LLC
18553 Brooke Road, Sandy Spring, 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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Bacon Company
18553 Brooke Road, Sandy Spring, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Dickerson 2
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J Maurice Carlisle Inc
19700 Barnesville Rd, Dickerson, MD 20842
- 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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Maurice J Carlisle Inc
19700 Barnesville Rd, Dickerson, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Germantown 2
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Clarksburg Plumbing
23230 Ridge Rd, Germantown, 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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Gebcon Corporation
17504 Black Rock Rd, Germantown, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Rockville 2
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Linc Construction Services LLC
704 Wade Avenue, Rockville, MD 20878
- 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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Mncppc
16641 Brabbs Broch Way, Rockville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Boyds 1
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Miller Excavating, Inc
13850 Old Baltimore Rd, Boyds, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Brookeville 1
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Perfect Finish Remodeling Inc
4335 Roxbury Mill Rd, Brookeville, MD 20886
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Laytonsville 1
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John Seek Septic Tank Pumping
21616 1st St, Laytonsville, MD 20882
From their website: Pumping · Inspection · Repair · Drain field · Grease traps
Silver Spring 1
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Oak Hill Construction
16910 Oak Hill Rd, Silver Spring, MD 20905
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Installation · Repair · Aerobic systems · Risers & lids · Perc testing
Spencerville 1
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Renovation Craftsmen
1313 Spencerville Road, Spencerville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Upper Marlboro 1
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Bryant Built LLC
9502 Fitzgerald Ct., Upper Marlboro, MD 20879
- 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 Montgomery 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 Montgomery County: common questions
How many licensed septic companies are in Montgomery County, MD?
29 septic companies serve Montgomery County, Maryland, and 28 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 Montgomery County?
2 of the 29 listings in Montgomery 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 Montgomery County?
28 listings in Montgomery 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.