How many toilets does OSHA require on a construction site?
OSHA 29 CFR 1926.51(c), Table D-1, requires 1 toilet for 20 or fewer workers, 1 toilet seat and 1 urinal per 40 workers for 20 to 199 workers, and 1 toilet seat and 1 urinal per 50 workers for 200 or more. A standard porta potty has one seat and one urinal, so it counts as one of each.
| Workers | Minimum units |
|---|---|
| 1–20 | 1 |
| 21–40 | 1 |
| 41–80 | 2 |
| 81–120 | 3 |
| 121–199 | 4–5 |
| 200–250 | 5 |
Read the official text at OSHA 1926.51. Nebraska follows federal OSHA for private employers; there is no separate state plan for private construction.
Does a job site need a hand-washing station?
A construction site needs hand-washing facilities under OSHA 29 CFR 1926.51(f) whenever workers handle paints, coatings, herbicides, insecticides or other harmful materials. Concrete, drywall mud and lead paint crews fall in this group. A two-sink portable hand-washing station meets the need without water or power.
In practice, most general contractors around Lincoln put one hand-washing station beside every 2 to 3 units during the warm months, then switch to sanitizer once nights freeze.
What are the rules for farm field crews?
Farm field crews of 11 or more workers fall under OSHA 29 CFR 1928.110. The rule requires 1 toilet and 1 hand-washing facility for every 20 workers, placed within a quarter-mile walk of each worker, or at the closest vehicle access point if the field is farther.
Source: OSHA 1928.110. Toilets must also be kept clean and supplied with toilet paper, and hand-washing water must be potable. For moving crews, trailer-mounted units that the driver relocates each service visit are the simplest fix.
How often must a job site porta potty be serviced?
OSHA requires sanitation facilities to be kept clean and sanitary, without naming a schedule. Weekly service is the industry norm and is included on our long-term rentals. Crews of more than 10 per unit, or long weekly hours, should add a second visit.
An overflowing unit is one of the most common complaints that triggers an inspection, so err on the side of more service. See construction porta potty rental for how service days work.
What mistakes do Nebraska contractors make with job site toilets?
The most common mistakes are too few units after the crew grows, no hand-washing station for concrete or paint crews, units placed where the service truck cannot reach, no lock after hours, and units left on open ground in high wind. Each one is easy to fix with a phone call.
- Recount every time trades overlap: framers, electricians and plumbers on site together can double the crew.
- Place units within 25 feet of truck access.
- Ask for stakes or straps on open lots.
- Use the calculator with your peak crew size.
This guide summarizes federal rules and is not legal advice. Confirm with your safety officer.