2024 Ontario Building Code (OBC) Table 8.2.1.3.-B: Sewage Design Flow for Commercial and Institutional Occupancies
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OBC Compliance Specialist
"In regions like London and Oakville, accurate flow calculations for office and retail spaces are the foundation of a successful building permit application. At empcontracting.ca Inc. your construction contractor in London, Ontario, we've found that specifically in Muskoka cottage country developments, adhering to these flow rates for campgrounds and public facilities is essential to protect local water tables and ensure long-term system performance."
When planning a commercial or institutional build, understanding the daily sewage design flow is critical for compliance with the 2024 Building Code Compendium. As empcontracting.ca Inc. your construction contractor in London, Ontario, we help developers and property owners interpret these complex Part 8 requirements to ensure infrastructure reliability.
OBC Table 8.2.1.3.-B: Daily Design Sewage Flow Volumes
The following data identifies the volume of sewage in litres per day for specific occupancies, which is fundamental for sizing septic tanks and leaching beds.
Food Service and Retail Establishments
- Cafeterias: 12 litres per meal.
- Food Outlets (Meat Dept): 380 litres per 9.25 m² of floor space.
- Food Outlets (Bakery/Delicatessen): 190 litres per 9.25 m² of floor space.
- Shopping Centres: 5 litres per 1.0 m² (excluding food and laundry).
- Standard Stores: 1,230 litres per water closet.
Healthcare and Long-Term Care
- Hospitals (with laundry): 750 litres per bed.
- Hospitals (without laundry): 550 litres per bed.
- Long-Term Care Homes: 450 litres per bed.
Educational and Professional Spaces
- Office Buildings: 75 litres per employee per shift or per 9.3 m² of floor space.
- Schools (Day Schools): 30 litres per student plus 50 litres per non-teaching employee.
Public Assembly and Recreational Facilities
- Theatres (Indoor): 20 litres per seat.
- Stadiums and Ball Parks: 20 litres per seat.
- Public Parks: 20 litres per person (toilets only) or 50 litres (including showers).
- Campgrounds (Full hook-up): 425 litres per site.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.