Licensed Septic Companies in Williamsport, MD
5 septic companies serve Williamsport, 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 Williamsport
Guides: Septic system installation · Aerobic septic systems · Installation cost · Pumping cost
5 septic companies in Williamsport
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Bowman Development Corp.
10228 Governor Ln Blvd, Ste 3002, Williamsport, MD 21795 · Washington 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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Cedar Valley Septic
12063 Kemps Mill Rd, Williamsport, MD · Washington 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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Jeff Hurd Septic Service
11845 Camden Rd, Williamsport, MD · Washington 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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Tana Plumbing
15813 Lockwood Rd, Williamsport, MD 21795 · Washington 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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Tana Plumbing & Heating LLC
15813 Lockwood Rd, Williamsport, MD · Washington 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 Williamsport and whether the permit fee is in their quote.
Maryland septic licensing: agencies, license types and how to check a license →
Septic companies in Williamsport: common questions
How many licensed septic companies are in Williamsport, MD?
5 septic companies serve Williamsport, 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 Williamsport?
5 listings in Williamsport 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.