Guides
Ontario Construction Site Portable Toilet Requirements Explained
Ontario construction site portable toilet requirements under Regulation 213/91 set worker-to-toilet ratios and let Ministry of Labour inspectors halt work.
What to take away
- Ontario construction sites follow section 29 of Regulation 213/91. The minimum is one toilet for every 10 workers on site at one time, counting any part of 10 as a full 10.
- Every project needs at least one unit. The ratio steps up once 10 or more workers are present together.
- Units must be clean and stocked, and washing facilities with warm water, soap and a means of drying must be provided where 10 or more workers are on site.
- The Ministry of Labour, Immigration, Training and Skills Development enforces the rule through inspections and orders. A missed deadline can bring a stop-work order.
- Municipalities control placement. A unit on a road allowance in Toronto or Hamilton needs a permit before delivery.
The worker-to-toilet ratio
Regulation 213/91 is the binding text for construction projects in Ontario. It was made under the Occupational Health and Safety Act, which also gives provincial inspectors their powers.
Section 29 sets the count. A project needs at least one toilet for every 10 workers at any one time, plus one more where the workers do not divide evenly by 10. Twenty-one workers means three units, not two.
Worker-to-toilet ratio
| Workers on site at one time | Minimum toilets under s. 29 |
|---|---|
| 1 to 10 | 1 |
| 11 to 20 | 2 |
| 21 to 30 | 3 |
| 31 to 40 | 4 |
| 41 to 50 | 5 |
The count follows workers present at any one time, not total payroll. A night shift that starts after the day crew leaves does not raise the requirement. Overlapping trades do, and that is where sites fall short.
Toilet Count Drivers by Site
Small renovation
- Count driver
- Worker count
- Who checks
- Ministry, contractor
Mid-size commercial
- Count driver
- Worker count + phase
- Who checks
- Ministry, municipal officer
Large subdivision
- Count driver
- Workers, trades, distance
- Who checks
- Ministry, owner, safety rep
Contractors who bid large projects often compare Ontario with the American rule in OSHA 1926.51. Those counts apply to United States job sites only.
For a worked comparison, portable restrooms per person on construction sites runs the same math on larger crews.
What sections 29 and 30 also require
Both sections sit in Regulation 213/91. Section 29 covers the units. Where a flush toilet is not reasonably practicable, a chemical or portable toilet is allowed.
The constructor must keep the units clean and supplied with toilet paper for as long as the project runs.
Section 30 covers washing. Where 10 or more workers are on site, warm water, soap and a means of drying hands are required. On most sites that means a hand-wash station beside the cluster of units.
Servicing counts as compliance, not housekeeping. A unit that has gone weeks without pumping is not a sanitary facility, and an inspector treats it much like a missing one.
Fleet owners who check their own service records before an inspection avoid most orders. Those checks are set out in keeping a portable restroom rental business to standard.
Who enforces the rule and what an inspector can do
Ontario's construction inspectors work for the Ministry of Labour, Immigration, Training and Skills Development. They can enter a site without a warrant, question workers and require documents.
Enforcement and inspection
- An inspector attends, often after a complaint, an incident or a scheduled blitz on one sector.
- Facilities are counted against the workers present and checked for servicing, supplies and hand washing.
- A shortfall brings a written order naming the constructor or employer, with a date to comply.
- Missing that date can bring a stop-work order on part or all of the site.
- The Ministry can also lay charges, and a conviction carries a fine set by the court under the Act.
Municipal permits and how long they take
Placement on private property usually needs no municipal permit. Site plan conditions, screening rules and setbacks can still apply. A unit on a road allowance, sidewalk or boulevard needs one.
Municipal permits
Permit for a unit on the road allowance
- Toronto
- Street use permit, Municipal Code Chapter 743 (Streets and Sidewalks)
- Hamilton
- Road occupancy permit
- Ottawa
- Road occupancy permit
Typical review time
- Toronto
- Days to a few weeks
- Hamilton
- Two to six weeks
- Ottawa
- Two to four weeks
Service standards change, so treat those ranges as typical and confirm with the city's right-of-way office before delivery. The provincial rule needs no application and applies from the first day of work.
Example: a compliant setup for 42 workers in Hamilton
A mid-rise commercial project peaks at 42 workers across two trades, with both sexes on site. The regulation floor is five units.
Compliant setup for 42 workers
- Five standard units as the legal minimum, plus a sixth written into the contract by the general contractor.
- A hand-wash station beside the unit cluster, with fresh water, soap and paper towels, to meet section 30.
- Weekly pumping and cleaning, moved to twice weekly in July and August or when use rises.
- Toilet paper and deodorizer restocked at every service visit.
- Waste pumped to an approved receiving facility, with the manifest kept on file.
Service intervals follow use rather than the calendar. Route planning around those intervals is covered in portable restroom pumping frequency.
If an inspector arrives at that Hamilton site and finds two unserviced units and no washing station, the escalation is fast.
Hamilton Compliance Order Sequence
- Inspector arrivesFour-storey commercial project in Hamilton
- Finds violationsTwo toilets, 42 workers, unserviced, no hand-washing
- Issues orderCompliance order with a deadline
- Contractor must fixAdd units, pumping, washing facilities
- Failure consequenceStop-work order on affected area
A stop-work order does not pause the schedule. It pauses the work, and the trades still expect to be paid for the days they cannot proceed.
Document what you were told about worker counts, the units you supplied and the dates you serviced them. That record decides who carries the cost when a general contractor looks for someone to blame.
