Licensed Septic Companies in Harford County, MD
45 septic companies serve Harford County, Maryland, and 44 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 Harford County
Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost
45 septic companies in Harford County
Forest Hill 8
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Atlantic Design And Build
1306 Boggs Road, Forest Hill, 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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C & L Excavating Inc
P.O. Box 184, Forest Hill, 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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C&L Excavating
Po Box 539, Forest Hill, 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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Chavis Septic Services
346 Bynum Rd, Forest Hill, MD 21050
- 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 · Perc testing · Grease traps Per state license: Aerobic systems
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Fred The Plumber LLC
712 Chestnut Hill Road, Forest Hill, 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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Robyn'S Septic Service
297 Dellcrest Dr, Forest Hill, 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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Warfield Backhoe Service
1820 Grafton Shop Rd, Forest Hill, 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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Pleasantville Construction
1952 Pleasantville Rd, Forest Hill, 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
Jarrettsville 8
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Bedsaul Plumbing Inc
1339 Knopp Road, Jarrettsville, MD 21084
- 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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Chavis Enterprises
P.O. Box 451, Jarrettsville, 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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Chavis Enterprises, LLC
P. O. Box 451, Jarrettsville, 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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Earl E Preston Jr Inc and Whiteford Septic Service
4045 Federal Hill Rd, Jarrettsville, MD 21084
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Pumping · Installation · Risers & lids · Perc testing Per state license: Aerobic systems
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Earlpreston Jr Inc
4045-C, Jarrettsville, 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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Jones Pump service
4213 Madonna Rd, Jarrettsville, 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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Jones Pump Service
4213 Madonna Rd, Jarrettsville, MD 21084
- 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 · Perc testing · Grease traps Per state license: Aerobic systems
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Ron Fletcher Inc
P.O. Box 641, Jarrettsville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Bel Air 5
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Bradys Business
2221 Calvary Rd, Bel Air, 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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Hanks Contracting
2107 Jacobs Well Ct, Bel Air, 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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Pinnacle Excavating
1933 Cypress Dr, Bel Air, 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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Pinnacle Excavating
1933 Cypress Dr, Bel Air, 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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S$S Contractor Services, LLC
2215 E. Churchville Rd, Bel Air, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Street 5
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Cauallucci And Cauallucci Plumbing
1032 Doyle Road, Street, 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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Elite Transport Inc
3235 Conowingo Rd, Street, 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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Garrison Plumbing LLC
1110 Poplar Grove Rd, Street, MD 21154
- 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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Hall'S Septic Services Inc
1410 N Tucker Rd, Street, 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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J Dennis Bosley Service Inc
2646 Dublin Rd, Street, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Aberdeen 3
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American Septic & Backhoe
3402 Carvale Dr, Aberdeen, 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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Mini Excavation Services, Co
2112 Forestside Drive, Aberdeen, MD 21001
- 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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John's Septic Service
510 S Stepney Rd, Aberdeen, MD 21001
From their website: Pumping · Installation · Inspection · Repair · Drain field · Risers & lids · Perc testing · Grease traps
Abingdon 2
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Abingdone Complete Services
3723 F Abingdon Beach Road, Abingdon, 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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Lucas Construction
704 W Baker Ave, Abingdon, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Darlington 2
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Cox Enterprises LLC
PO Box 23, Darlington, 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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Smith & Smith Inc
3191 Deths Ford Rd, Darlington, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Fallston 2
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Brian Baker Inc
P.O. Box 495, Fallston, 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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Jfg Plumbing
2727 Harford Road, Fallston, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Pylesville 2
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C E Campbell Plumbing & Heating, Inc.
1244 Ridge Road, Pylesville, MD 21132
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Installation Per state license: Aerobic systems
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Knox Enterprises Inc
1350 Quarry Rd, Pylesville, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Whiteford 2
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Barnhart Excavating
2107 A Whiteford Road, Whiteford, 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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Cox Enterprises LLC
4439 Prospect Rd, Whiteford, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Conowingo 1
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Alexander Plumbing Services Inc
53 Crocus Ct, Conowingo, MD 21034
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Cumberland 1
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Floyd Price Construction
16111 Colllier Run Rd Se, Cumberland, MD 21161
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
From their website: Perc testing Per state license: Installation · Aerobic systems
Edgewood 1
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Rh Pest Management LLC
SAND PEOPLE PROFESSIONAL BUILDING, 2809 Pulaski Hwy, Edgewood, MD 21040
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Havre De Grace 1
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Bowman'S Backhoe Service
4201 Webster Road, Havre De Grace, MD
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Havre de Grace 1
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Cerny Enterprises, LLC
P.O. Box 763, Havre de Grace, MD 21001
- Licensed: Maryland MDE Certified BAT (Best Available Technology) Septic Installer (Maryland Department of the Environment, verify)
Per state license: Installation · Aerobic systems
Havrfe De Grace 1
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A. M. Curry Excavating Inc
442 Cooley Mill Rd, Havrfe De Grace, MD 21001
- 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 Harford 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 Harford County: common questions
How many licensed septic companies are in Harford County, MD?
45 septic companies serve Harford County, Maryland, and 44 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 Harford County?
4 of the 45 listings in Harford 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 Harford County?
45 listings in Harford 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.