Maryland registers septic system installers and inspectors through the Maryland Department of the Environment's Board of On-Site Wastewater Professionals. This page lists them from the official state roster.
Showing the first 120 of 1330 certified companies (A–Z). Browse every Maryland company by name:
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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| 1st Choice Inspection Service | Edgewater, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01613 |
| 24/7 Grease Trap & Services, Inc. | Manassas Park, VA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01115 |
| 247 Grease Trap & Services | Manassas Park, VA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02391 |
| 7 Enterprises, LLC | Towson, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02489 |
| A game inspections LLC | Huntingtown, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00014 |
| A pair of Hands Contracting | Bryans Road, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01948 |
| A-1 Pump Service, Inc. | Darlington, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00968 |
| A-1 Sanitation Service Inc | New Castle, DE | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00358 |
| A-1 Septic Services, Inc. | Pasadena, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00542 |
| A-Plus Septic Service LLC | Galena, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00736 |
| A. J. Michaels Company | Baltimore, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00373 |
| A. Murrays Home Inspections | Oakland, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00080 |
| A.E. Berg Plumbing | Federalsburg, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 01447 |
| A.S.A.P. Port-A-Pots, Inc. | Hampstead, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01828 |
| A.S.A.P. Pumping Services Corp (Lewis | Parsonsburg, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01989 |
| A&A Construction and Utilities | Baltimore, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02082 |
| A&F Siteworks, LLC | Brandywine, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01793 |
| A&J Home Inspections LLC | Morgantown, WV | — | Inspector (BAT O&M)Installer (BAT)Installer (Sand Mound) | 02221 |
| A&V Septic Services LLC | Pasadena, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 00279 |
| A+J Septic Cleaners | Elkton, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 01234 |
| A2Z Environmental Group, LLC | Baltimore, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00722 |
| AAH Consultants LLC | Lanham, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01990 |
| AB&H Excavating, Inc. | Callaway, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00885 |
| Abbott Septic Tank Service | — | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00503 |
| ABC Trucking & Backhoe Service Inc | Berlin, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00570 |
| ABM Property Services LLC | Salisbury, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 00953 |
| Absolute Plumbing & Heating Inc | Fruitland, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (BAT) | 01798 |
| Absolute Plumbing LLC | Timonium, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02233 |
| Ac & T | Hagerstown, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 01564 |
| AC&T Co., Inc. | Hagerstown, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00936 |
| Accurate Environmental LLC | Stevensville, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01598 |
| Acorn Environmental Inc | Severna Park, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00280 |
| Action Wasterwater Solutions, Inc. | North Beach, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00219 |
| Action Wasterwater Solutions, Inc. | Owings, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01780 |
| Adam Construction, LLC | McHenry, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (Sand Mound) | 00230 |
| Adams & Sons Constructions, Inc. | Cumberland, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade) | 00556 |
| Addisu Woldesenbet | Silver Spring, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02411 |
| Adsg | Crownsville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00303 |
| Advanced Surveys, Inc. | Chesapeake Beach, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00571 |
| Affordable Septic & Excavating LLC | Hagerstown, MD | — | Inspector (BAT O&M)Installer (At-Grade) | 00992 |
| AJ Fenwick Septic, LLC | Avenue, MD | — | Inspector (BAT O&M)Installer (At-Grade) | 00062 |
| AJ Mcdonald Co., Inc. | Glen Burnie, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (Sand Mound) | 00413 |
| AJK Hauling | Princess Anne, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 02267 |
| Albright Excavating LLC | Grantsville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (BAT) | 01874 |
| Albright Services | Grantsville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 01264 |
| Alexander Plumbing services, INC | Darlington, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 01522 |
| Alford Homes Inc | Manchester, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00979 |
| Alfred Bradford | Marion Station, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01970 |
| All About Septics, LLC | Pasadena, MD | — | Inspector (BAT O&M)Installer (At-Grade) | 00012 |
| All Around Plumbing Inc. | Mount Airy, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01896 |
| All in One Home Inspections, LLC | Hollywood, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02006 |
| All Mechanical And Plumbing, L | Mechanicsville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02492 |
| Allen's Backhoe Service | Woodbine, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00288 |
| Alpha Plumbing | Pasadena, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00458 |
| American Combustion Industries Inc | Glen Dale, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00452 |
| American Outback Septic Service | Fruitland, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01837 |
| American Sanitation, Inc. | Brandywine, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01902 |
| American Septic & Backhoe | Aberdeen, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (Sand Mound) | 00343 |
| Amerispec Home Inspections | Hartly, DE | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02023 |
| Amy Taylor Design and Drafting service | Arnold, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01988 |
| Anarex, Inc | Millersville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00182 |
| Anderson Backhoe Service, Inc | Monrovia, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT) | 00127 |
| Anderson's A1 Plumbing | Hanover, PA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 02214 |
| Andrew Frase Excavating, LLC | Trappe, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01339 |
| Andrew Sebold | McHenry, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 00598 |
| Annapolis Sanitation | Centreville, MD | — | Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00212 |
| Annapolis Septic Service | Greensboro, MD | — | Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00211 |
| Anthony's Excavating | Elkton, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (Sand Mound) | 00952 |
| Antietam Excavating | Sharpsburg, MD | — | Inspector (Property Transfer) | 01718 |
| Antrim Septic Service | Greencastle, PA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade) | 00641 |
| Apex Plumbing and Gas | Union Bridge, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01426 |
| API Construction LLC | Oakland, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 01840 |
| Appalachian Builders LLC | Kitzmiller, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02459 |
| Appel Excavating | Delta, PA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00090 |
| Apple Plumbing and Heating, Inc. | Westminster, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00227 |
| Arkan, LLC | Westminster, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 01870 |
| Arrow Development Services, LLC | Charlotte Hall, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00636 |
| Arrow Environmental service inc | Grasonville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02340 |
| Arundel Kitchen Services | Gambrills, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02318 |
| Arundel Septic Services | Pasadena, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02218 |
| ASAP Pumping Service | Salisbury, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT) | 00592 |
| Ashby Property Services | Oakland, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (BAT) | 01445 |
| Athletic Field Consultants, Inc. | Queenstown, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01018 |
| Atlantic Bio Fuels, LLC. / Drain Rescue | Baltimore, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00520 |
| Atlantic Home Builders | Berlin, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01976 |
| Atlantic Mechanical, LLC | Baltimore, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02250 |
| Atlantic Pumping, Inc. | Bishopville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02090 |
| Atlantic Solutions | Tiverton, RI | — | Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00673 |
| Atlantic Wastewater Solutions, LLC | Gambrills, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01137 |
| Atlantic Wastewater Solutions, LLC | Crofton, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02468 |
| Atlas Inspections LLC | Charlestown, MD | — | Inspector (BAT O&M)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01064 |
| Atwell, LLC | Annapolis, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00455 |
| Atwell, LLC | Southfield, MI | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01912 |
| Austins Dirtworks LLC | La Plata, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01176 |
| B & B Land Management | Chester, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00983 |
| B & W Plumbing | Park Hall, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT) | 02383 |
| B + S Septic/ Whaley’s Construction | Eden, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 01373 |
| B and B Septic Service | Street, MD | — | Inspector (BAT O&M) | 00097 |
| B L Phippin Construction, Inc | Delmar, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade) | 01142 |
| B-N-B Excavating | Dameron, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade) | 01362 |
| B.B. Landscaping LLC | Easton, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00296 |
| B.E. Miller & Son Septic Services LLC | Street, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00415 |
| B.W. Compton Companies LLC | Port Tobacco, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01835 |
| B&B Excavating, Inc. | Lusby, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01539 |
| B&D Siteworks, LLC | Lexington Park, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 00700 |
| B&K Excavating, LLC | Keymar, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 00251 |
| B&R Excavating | Nottingham, PA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01189 |
| Back River Pre-Cast, LLC | Glydon, MD | — | 00148 | |
| Bailey Bros. Plumbing & Drain Services | West River, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 02022 |
| Barrett and Associates | Prince Frederick, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00444 |
| Barry Bechtel General Contract Inc | York Springs, PA | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade) | 00243 |
| Barton & Loguidice, D.P.C. | Eldersburg, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00693 |
| Barton & Loguidice, D.P.C. | Annapolis, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (BAT) | 02156 |
| Bat Onsite LLC | Union Bridge, MD | — | Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00677 |
| Bathon Rentals | Queenstown, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 01901 |
| Bay Area Associates Inc | Chesapeake City, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (Sand Mound) | 00282 |
| Bay Engineering Inc. | Annapolis, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 00558 |
| Bay Environmental Solutions LLC | Centreville, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (BAT) | 00631 |
| Bay hundred Environmental Vacuum P | St. Michaels, MD | — | Inspector (BAT O&M)Inspector (Property Transfer)Installer (At-Grade)Installer (BAT)Installer (Sand Mound) | 01782 |
| Bay Property Maintenance LLC | Easton, MD | — | Inspector (BAT O&M)Inspector (Property Transfer) | 02400 |
Most directories only tell you who to call. These are the cases where the honest answer is that you may not need this service at all, and the mistakes that cost people the most money.
Typical septic pumping pricing, with sources: what this costs in MD →
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