OSHA portable toilet requirements in the USA
For most construction employers, the key federal rule is OSHA’s construction sanitation standard, 29 CFR 1926.51(c). It does not require one specific brand or cabin style. It requires employers to provide enough sanitary toilet facilities, make them available to employees, and follow the applicable local code.
This guide summarizes the federal construction rule in plain language. It is educational information, not legal advice. Always confirm requirements with the controlling OSHA state plan, local authority having jurisdiction, project owner, and your safety professional.
Federal requirements, point by point
Provide enough toilets
For construction jobs with 20 or fewer employees, provide at least one toilet. OSHA’s table requires one toilet seat and one urinal per 40 workers for 20–200 employees, and one toilet seat and one urinal per 50 workers when the workforce is over 200.
Keep facilities sanitary
The employer must provide sanitary toilets that are readily available. A portable cabin that is full, unusable, or not maintained is not an adequate facility.
Use an approved type
Where there is no sanitary sewer, OSHA permits privies where safe, chemical toilets, recirculating toilets, or combustion toilets, unless local codes prohibit a particular type.
Plan for temporary field conditions
Even under temporary field conditions, at least one toilet facility must be available. Do not treat a short-duration project as automatically exempt.
Know the mobile-crew exception
The toilet-facility rules do not apply to mobile crews when transportation is readily available to nearby toilet facilities. The employer still must ensure access is practical and sanitary.
Provide handwashing support
OSHA requires adequate washing facilities at workplaces, maintained in sanitary condition, with running water, soap or cleanser, and individual towels or an air blower.
Follow local requirements too
OSHA is the federal baseline. State plans, county health departments, municipalities, event venues, and project owners may require more units, servicing, handwashing stations, accessibility, or placement controls.
OSHA toilet-count table
| Employees | Minimum facilities |
|---|---|
| 20 or fewer | 1 toilet |
| 20–200 | 1 toilet seat and 1 urinal per 40 workers |
| More than 200 | 1 toilet seat and 1 urinal per 50 workers |
What a compliant site plan looks like
Before delivery, count the largest expected crew, consider shifts and peak attendance, identify a level and accessible placement area, and add handwashing near the cabins. Schedule servicing often enough that the units remain clean and usable. For public events, ask the venue about ADA access, food-service separation, lighting, anchoring, and emergency access.
The official source is OSHA 29 CFR 1926.51. Palm Coast Portable Comfort Co. can help you estimate unit counts and service frequency, but your employer or site safety representative remains responsible for compliance.