Licensed Septic Companies in Great Mills, MD
6 septic companies serve Great Mills, Maryland, and 6 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 Great Mills
Guides: Septic tank pumping · Septic system installation · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost
6 septic companies in Great Mills
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A & A Construction
Po Box 117, Great Mills, MD 21215 · Baltimore County
- 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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Delta Construction Co
45846 D Highway To Heaven, Great Mills, MD 20743 · Prince George's County
- 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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Duncan Lepper
Po Box 317, Great Mills, MD · St. Mary's County
- 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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Larry Hills & Sons Excavating Inc
20531 Point Lookout Rd, Great Mills, MD · St. Mary's County
- 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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Larry Hills & Sons Excavating, Inc
20531 Point Lookout Rd, Great Mills, MD · St. Mary's County
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Pumping · Repair · Drain field · Perc testing Per state license: Installation · Aerobic systems
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Larry Hills and Sons Excavating
20531 Point Lookout rd, Great Mills, MD 20634 · St. Mary's County
- 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 Great Mills and whether the permit fee is in their quote.
Maryland septic licensing: agencies, license types and how to check a license →
Septic companies in Great Mills: common questions
How many licensed septic companies are in Great Mills, MD?
6 septic companies serve Great Mills, Maryland, and 6 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 Great Mills?
1 of the 6 listings in Great Mills 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 Great Mills?
6 listings in Great Mills 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.