Contractor profiles
- Rooter-Man
- Roswell Concrete Products
- Roth North America
- RT Excavation Inc.
- Rudak Excavating Inc.
- Ruppert Haulage Inc
- RVSS - Rideau Valley Septic Services
- S Charlebois Haulage And Excavating LTD
- Safe Sewage Systems Consulting Inc.
- Sanitary Sewer Cleaning Co Ltd.
- SciCorp International Corp
- Scotland Yard Facility Maintenance
- Scott's Excavating & Landscapes
- SCS (Smale Consulting Services)
- Seamless Building
- Seeley Group Inc.
- Seneca College
- Seneca Polytechnic
- Seneca Polytechnic
- Septex Design Engine
- Septivac Service
- SGB Septics – Shannon Burchill
- Sharpworks Landscaping
- Site Ex Inc.
- Siteworks Construction
- Skootamatta Environmental Consulting Inc.
- Slagter Construction Ltd
- Sludge Mapper
- Smith Excavating, Grading & Septic Services
- SMV Forestry & Construction
- Snork's Septic Service
- Snorks Septic Service
- Snow Brothers Contracting
- Soil Surgeons Excavating and Grading Inc.
- St. Bernard Septic Design and Consult
- Star Toilet Rentals
- Stealth Environmental
- Stephens Excavating
- Stonecairn Consulting Inc.
- Storring Septic Service