Federal OSHA rules at 29 CFR 1926.51 set how many toilet facilities and washing facilities a construction site needs, with a table that rises with crew size. In North Carolina, waste from portable toilets and site holding tanks is generally handled by a permitted septage firm. Confirm the current state rule before you plan the site.
Key takeaways
- The OSHA toilet table in 29 CFR 1926.51(c) sets the minimum by crew size: one facility for 20 or fewer workers, and more above that.
- 29 CFR 1926.51(f) requires washing facilities, so handwashing is part of the requirement rather than an extra.
- The common paraphrase, one toilet per 20 workers, is a vendor summary and not the regulation's wording, so read the table itself.
- North Carolina rules generally require a permitted septage management firm to handle waste from portable toilets.
- OSHA places the duty on the employer, so confirm with the general contractor who is supplying the units before ordering.
- The codified North Carolina text was not checked for this guide, so confirm it with the state before you plan.
What does OSHA require for toilets on a construction site?
29 CFR 1926.51(c) sets a table of toilet facilities by number of workers: one facility for 20 or fewer workers, and one seat and one urinal per 40 workers above that. Crew size drives the count.
The table is a floor, not a target. A site with a large crew, a long shift or a mix of trades needs enough units that nobody has to wait, so the count should be planned from the real crew each week rather than a single number set at the start.
The rule places the duty on the employer. Before ordering units, confirm with the general contractor who is supplying the toilets and who is checking them.
Are washing facilities required on a construction site?
Yes. 29 CFR 1926.51(f) requires washing facilities, and handwash stations placed near the toilets are one way to provide them on a site without plumbing.
Washing facilities are a separate requirement from toilets. Handwash stations are one way to meet it where a site has no water line, and they belong near the toilets and the eating area.
Ask whether the station needs its own water supply and waste handling, since the provider has to cover both.
What does North Carolina require for holding tanks on a site?
North Carolina rules generally require that waste from portable toilets and site holding tanks is handled by a permitted septage management firm. The codified text was not checked for this guide, so confirm it with the state.
Under North Carolina's septage rule, renting, leasing or managing waste from portable toilets is an activity for a permitted septage management firm, and placing a portable toilet for use in the state is treated the same way. The statute and rule were not checked against the current code for this guide.
Ask the provider which firm empties the tank, whether that firm holds the state permit, and how to check the permit with the state's environmental department.
How do you plan site units for the whole job?
Plan the count, the placement and the servicing schedule for the whole job, and review them whenever the crew size changes.
Place units off the traffic route, on level ground, and where the crew can reach them without crossing the active work area. Agree a servicing schedule with the provider and check the units at each visit.
When the crew grows, add units before the new crew arrives rather than after the first complaint.
Frequently asked questions
Does the OSHA table apply to every site?
It applies to construction sites covered by the OSHA construction standard. Confirm with the general contractor how the site is set up.
Who empties a construction site toilet in North Carolina?
Under the state's septage rule as generally stated, a permitted septage management firm. Ask the provider which firm handles it and check the permit with the state.
Where do I check the North Carolina rule?
The statute is in the General Assembly's published law, and the state environmental department runs the septage programme. Confirm the current text before you plan.
Sources
- Occupational Safety and Health Administration, 29 CFR 1926.51
- North Carolina General Assembly
- North Carolina Department of Environmental Quality
This guide is general information for Mecklenburg County homeowners, not a substitute for an on-site inspection. Prices are estimates. See our disclaimer.