Contractor profiles
- Jillian's Septic Design
- Jim's Portable Toilets and Septic Service
- JJ Mclellan & Son
- JM Consulting
- Joe Mumby Septic Tank Pumping
- John Knox Pumping Service
- John Warden Septic Tank Pumping
- Johnny by the Bay Portable Toilets
- Johnny on the Spot
- Johnson Septic Service Ltd.
- Jones Contracting and Building Service
- Jp2g Consultants Inc.
- Just In Time Sanitation
- K & T Port a John Rentals
- K. Smart Associates Limited
- K. Winter Sanitation
- Karhi Contracting
- KB Septic Pumping
- Ken White Construction
- Kinburn Plumbing & Heating
- King Excavation and Septic Inc
- Kingfish Pumping
- Kirwin & Oatman Excavating
- Knapps Paving & Landscaping – Russ Knapp
- Kollaard Associates
- Kollaard Associates Engineers
- Kollaard Associates Engineers – Kaleb Lakew or Paul Villeneuve
- Kuipers Construction
- Kwality Rentals & Sanitation
- Lacroix Excavation – Alain & Nykola Lacroix
- Ladcon
- Lake of Bays Septic Services
- Lambton Sanitation
- Lamoureux Pumping
- Landforge
- Lascelles Engineering
- Lascelles Engineering – François Eli
- Lauren Spivak - Architectural Designer
- Laviolette Excavation – Charles Laviolette
- Lavish Portable Restrooms