OSHA Porta Potty Requirements for Texas Construction Sites
Texas has no state OSHA plan for private employers, so federal OSHA rules apply on every Texas job site. Here's what they require for toilets and hand washing.
How many toilets does OSHA require?
OSHA 29 CFR 1926.51(c) Table D-1 requires at least one toilet for 20 or fewer workers; one toilet seat and one urinal per 40 workers for 20 to 199 workers; and one seat and one urinal per 50 workers for 200 or more. The toilets must be kept sanitary.
| Workers | Minimum |
|---|---|
| 20 or fewer | 1 toilet |
| 20–199 | 1 seat + 1 urinal per 40 |
| 200+ | 1 seat + 1 urinal per 50 |
Is weekly service enough?
OSHA requires toilets to be kept sanitary but does not set a service frequency. Industry practice (ANSI Z4.3, cited in an OSHA interpretation) uses about one toilet per 10 workers with weekly service. In Texas summer heat, crews of more than 10 per unit should add a second weekly service.
Source: OSHA interpretation letter, 2006.
Do I need hand-wash stations?
OSHA 1926.51(f) requires washing facilities where workers apply paints, coatings or other contaminants, kept sanitary and near the work. Most Texas crews add one hand-wash station for every 20 workers or at each break area.
What about farm crews?
Farm field crews follow OSHA 1928.110: one toilet and one hand-washing facility per 20 workers, within a quarter-mile walk, when 11 or more workers are employed in hand labor. This matters across rice and cotton country in Jackson and Wharton counties.
Worked example: a 45-worker commercial build
A 45-worker commercial build needs 2 toilet seats and 2 urinals under OSHA Table D-1, because 45 divided by 40 rounds up to 2. With weekly service in Texas heat, we recommend 5 standard units (45 divided by 10, rounded up) plus 2 hand-wash stations at the break area.
Each of our standard units has one seat and one urinal, so 5 units give 5 seats and 5 urinals — well above the minimum, with lines short enough to keep crews on task.
Related reading
Written by the Kyle Rental Works dispatch desk — the team that books, routes and services every unit from our yard at 1107 E Oak St, Victoria, TX 77901. Answers come from 173 recorded rental calls and our own delivery routine.
Reviewed against current OSHA, ADA and City of Victoria sources: October 6, 2026