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Baltimore City County, Maryland

Licensed Septic Companies in Baltimore City County, MD

5 septic companies serve Baltimore City County, Maryland, and 5 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 City County

Guides: Septic system installation · Aerobic septic systems · Installation cost · Pumping cost

5 septic companies in Baltimore City County

Baltimore 5

  • Aj Michaels

    4512 York Rd, Baltimore, MD

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

    Per state license: Installation · Aerobic systems

    (410) 435-5400

  • Ernst Environmental Services, Inc

    1907 Midland Rd, Baltimore, MD

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

    Per state license: Installation · Aerobic systems

    (410) 288-5081

  • Higgs Cowan Construction

    4555 Hollins Ferry Road, Baltimore, MD

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

    Per state license: Installation · Aerobic systems

    (443) 255-2920

  • Honga Excavating, Inc

    2104 Rosalie Ave, Baltimore, MD

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

    Per state license: Installation · Aerobic systems

    (410) 687-1783

  • Lenny S Plumbing

    10504 Bird River Road, Baltimore, MD

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

    Per state license: Installation · Aerobic systems

    (410) 218-0923

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 City 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 City County: common questions

How many licensed septic companies are in Baltimore City County, MD?

5 septic companies serve Baltimore City County, Maryland, and 5 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 install septic systems in Baltimore City County?

5 listings in Baltimore City 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.