OSHA Porta Potty Requirements for Illinois Job Sites

OSHA 1926.51 toilet counts for construction

Source: OSHA 29 CFR 1926.51(c). Requirements apply where no sanitary sewer is available.
Number of workers	Minimum facilities
20 or fewer	1 toilet
20 or more	1 toilet seat and 1 urinal per 40 workers
200 or more	1 toilet seat and 1 urinal per 50 workers

What contractors actually plan for

The OSHA minimum keeps you compliant, but units fill fast. Most crews plan one unit per 10 workers on a 40-hour week with weekly service, and add a second weekly visit for bigger crews or long shifts.

Hand washing

OSHA 1926.51(f) requires washing facilities where workers handle paints, coatings or other contaminants. A portable hand wash station near the toilets covers this and keeps crews healthier.

Placement and access

Keep units close enough that workers do not lose time walking.
Set them on level ground, out of traffic and equipment paths.
Leave a clear path for the service truck within about 25 feet.
Anchor units on open or windy lots.

Mobile crews

OSHA allows crews that move often, like road and utility crews, to use toilets at nearby facilities only when transportation is readily available. A towable unit or trailer-mounted toilet is often simpler.

See construction porta potty rental for pricing and service.

Common questions

Does OSHA require porta potties on construction sites?

OSHA requires toilets on construction sites for employees. Where there is no sewer connection, that means portable toilets, starting at one for 20 or fewer workers.

How many porta potties for 50 workers?

OSHA requires at least two toilet seats and two urinals for 50 workers. Most contractors place about five standard units with weekly service.

Does Illinois have its own job-site toilet rules?

Private-sector job sites in Illinois follow federal OSHA rules. Public-sector employers in Illinois fall under the state OSHA plan, which adopts the same construction standards.