Contractor profiles
- Leahy Excavations Inc.
- Leamington Sanitation
- Leary Excavating & Septic Systems
- Leo Sarault & Fils Inc. Excavation – Gilles Sarault
- Leroy Construction
- Liberty Pumps
- LinScott Drainage LTD
- Lloyd McMillan Equipment Ltd.
- Lockwood Bros. Construction – Brad Code
- Lockwood Brothers Construction
- Losey’s Haulage – Jim Losey
- LRL Associates Ltd.
- LTM Construction Services
- M. Riddle Excavating
- M.G Excavation & Solutions
- M&G Portables
- M&S Sarrazin Excavation Inc. – Stephane
- Mac McGill Excavating
- MacGregor Concrete Products
- MacGregor Concrete Products (Beachburg) Limited
- Mahon Drainage
- Make-Way Environmental Technologies Inc
- Maurice Duval Excavation Inc. – Michel Pilon
- McCarthy Septic and Vac
- McIntosh Perry
- McIntosh Perry – Patrick Leblanc
- McVeigh Construction
- MECP
- Metropolitan Pump Co.
- Michael Codner
- Mike Clark Excavating and Septic Pumping
- Miles Excavating LTD
- Mitch Rowley Plumbing Inc.
- MND6 Inc.
- MNT Consulting Group Inc.
- Mohawk College
- Moose Creek Precast Inc
- Morey Associates Ltd.
- Morey Associates Ltd. – Dan Morey
- Mr. Septic Inc – Trevor McMahon