OSHA Construction Toilet Requirements
OSHA establishes minimum sanitation requirements for construction jobsites based on the number of employees. The threshold changes as the workforce grows.
Portable Units vs Required Fixtures
A portable toilet rental unit does not necessarily correspond one-to-one with every fixture combination described in the OSHA table. Check whether each rented unit contains a toilet seat, urinal or both.
Sanitation and Access Matter Too
Meeting a numerical ratio does not eliminate requirements for sanitary condition and reasonable employee access to facilities.
Frequently Asked Questions
How many toilets does OSHA require on a construction site?
Under 29 CFR 1926.51(c)(1), Table D-1 specifies one facility for 20 or fewer employees. Larger workforces use toilet-seat and urinal ratios based on workforce size.
What is the OSHA toilet ratio for 21 to 199 workers?
Table D-1 specifies one toilet seat and one urinal per 40 workers.
What is the OSHA toilet ratio for 200 or more workers?
Table D-1 specifies one toilet seat and one urinal per 50 workers.
Does this calculator determine event portable toilet quantities?
No. It is specifically designed around OSHA construction-jobsite sanitation thresholds, not event attendance planning.
Do unsanitary portable toilets count toward the OSHA minimum?
OSHA has explained that facilities in an unsanitary condition do not satisfy the requirement simply by being physically present.