Guide
OSHA Porta Potty Rules for Oklahoma Job Sites
Every Oklahoma construction site falls under federal OSHA sanitation rules. The core rule is short: 1 toilet for 20 or fewer workers, then 1 seat and 1 urinal for every 40. Here is how it works on a real job.
What does OSHA 1926.51 require for toilets?
OSHA 29 CFR 1926.51 Table D-1 requires 1 toilet for 20 or fewer workers. For 20 or more workers, the rule is 1 toilet seat and 1 urinal per 40 workers. For 200 or more, it is 1 seat and 1 urinal per 50. A standard porta potty has both a seat and a urinal.
| Workers | Required | Standard units |
|---|---|---|
| 1–20 | 1 toilet | 1 |
| 21–40 | 1 seat + 1 urinal | 1 |
| 41–80 | 2 seats + 2 urinals | 2 |
| 81–120 | 3 seats + 3 urinals | 3 |
| 200 | 4 seats + 4 urinals | 4 |
Are mobile crews exempt?
Mobile crews are exempt from the toilet rule only when they have transportation readily available to a nearby toilet. A fence or survey crew with a truck parked next to a gas station may qualify. A crew stuck on a lease road miles from town needs a unit, often a towable porta potty trailer.
Does OSHA require hand washing stations?
OSHA 1926.51(f) requires washing facilities when workers handle paints, coatings, herbicides, insecticides or other harmful materials. Concrete, drywall and painting crews should have a hand washing station. We suggest 1 two-sink station per 3 toilets on those sites.
How often does a job site porta potty need service?
OSHA requires toilets to be kept sanitary but does not set a service schedule. Weekly service is the industry standard and is included on every 28-day rental. Crews over about 15 workers per unit, or sites in July heat, usually need 2 visits a week.
This guide explains the federal rule. It is not legal advice. Your contract, city or project owner may require more. See construction porta potty rental.