What are OSHA porta potty requirements for construction sites?
OSHA 29 CFR 1926.51(c) requires 1 toilet for 20 or fewer construction workers. From 20 to 199 workers, the minimum is 1 toilet seat and 1 urinal per 40 workers. At 200 or more, the minimum is 1 toilet seat and 1 urinal per 50 workers.
| Number of employees | Minimum facilities (Table D-1) |
|---|---|
| 20 or fewer | 1 |
| 20 or more | 1 toilet seat and 1 urinal per 40 workers |
| 200 or more | 1 toilet seat and 1 urinal per 50 workers |
Read the full rule: OSHA 29 CFR 1926.51 Sanitation (eCFR). The rule does not apply to mobile crews that have transportation to nearby toilets. Each standard porta potty has both a toilet seat and a urinal, so 1 unit covers 1 seat and 1 urinal.
Does OSHA require handwashing at a construction job site?
Yes. OSHA 29 CFR 1926.51(f) requires employers to provide washing facilities at construction sites, and those facilities must be kept sanitary. A practical setup is 1 two-sided handwashing station for every 4 job site toilets, with a minimum of 1 station near the toilets.
See 1926.51(f) Washing facilities (eCFR). Our handwashing stations have foot-pump fresh water, soap and paper towels, and serve 2 people at once. Crews working with concrete, paint or lead need soap and water, not just sanitizer. See handwashing station rentals.
What is the legal minimum vs. the recommended number of job site toilets?
The OSHA legal minimum allows 1 toilet for up to 20 workers, but 1 standard porta potty with weekly service comfortably handles about 10 workers on a 40-hour week. Above 10 workers, Brian Rental Works recommends a second unit or a second weekly service visit.
| Crew size | OSHA minimum | Our recommendation |
|---|---|---|
| 6 workers | 1 | 1 unit, weekly service |
| 15 workers | 1 | 2 units, or 1 unit serviced twice a week |
| 45 workers | 2 (45 ÷ 40 = 1.125 → 2) | 5 units (45 ÷ 10 = 4.5 → 5) + 2 handwashing stations |
| 120 workers | 3 (120 ÷ 40 = 3) | 12 units, staggered service |
The minimum keeps you legal. The recommendation keeps the unit from filling up by Thursday. Use the construction tab in our calculator to check your crew.
What OSHA rules apply to porta potties outside construction?
OSHA 29 CFR 1910.141 covers toilets in general industry, like warehouses, plants and yards. OSHA 29 CFR 1928.110 covers farms: crews of 11 or more hand-labor field workers need 1 toilet and 1 handwashing facility per 20 workers, within a quarter-mile walk.
Sources: OSHA 29 CFR 1910.141 Sanitation (eCFR) and OSHA 29 CFR 1928.110 Field sanitation (eCFR). OSHA’s plain-language page is at osha.gov/sanitation. The farm rule exempts crews whose work, including travel, is 3 hours or less. Farm and field crew toilets · industrial portable restrooms.
Setting up a new job site? Check delivery for your lot
Give us the address, crew size and start date. Call by noon Mon–Sat for same-day delivery to most Hidalgo County job sites.
How does Texas heat change porta potty service on a job site?
Edinburg highs average 99.9°F in June, 100.9°F in July and 101.3°F in August. Heat speeds odor and fills tanks faster because crews drink more water. From June through September, Brian Rental Works recommends twice-weekly service for any crew over 10 workers.
Set units on flat ground in shade if you can, away from the dumpster and the road. Keep the door facing away from the afternoon sun. Weekly service includes pumping, cleaning, sanitizing, deodorizing and restocking. Extra visits can be added on any call.
How do I verify that my porta potty company hauls waste legally in Texas?
Texas requires waste haulers that transport portable toilet waste to register with TCEQ under 30 TAC Chapter 312. Ask your hauler for its TCEQ registration number, then look the number up in the TCEQ database. Brian Rental Works hauls waste in TCEQ-registered transporter trucks.
Check the registration on the TCEQ sludge transporter registration page. Our waste goes to authorized disposal facilities. A broker that hires different haulers each week may not be able to tell you whose truck is coming.
Is this guide legal advice?
No. This guide summarizes 3 OSHA sections — 1926.51, 1910.141 and 1928.110 — plus the TCEQ transporter rule as of October 2026. Rules change, and inspectors look at your specific site. Confirm your requirements with OSHA, your safety officer or your general contractor before you rely on any count.
For long jobs, see construction site toilets and long-term rentals.