OSHA requires 1 toilet for 20 or fewer construction workers, scaling to 1 toilet and 1 urinal per 40 workers up to 200, per OSHA 1926.51(c)(1). Mobile contractors bidding city or county jobs need this ratio in the proposal before construction site services get scheduled.
Start with the headcount, not the acreage. OSHA 1926.51(c)(1) sets the baseline: 1 unit per 20 workers on crews of 20 or under, then 1 toilet seat and 1 urinal per 40 workers as the crew grows, dropping to one seat and one urinal per 50 once you cross 200 workers. A 35-person framing crew in Mobile needs two units at minimum, not one, because 35 falls into the second tier. That is the core of osha portable toilet requirements construction crews run into first. Our how many porta potties do I need guide walks the math for mixed trades and multi-shift jobs. Renting light is the most common mistake we see on construction dumpster rental sites that also need sanitation, because crews assume one unit covers everyone through lunch. It does not. If your site runs two shifts, OSHA still counts concurrent workers per shift, not total headcount for the week. Pair your restroom order with a standard porta potty rental count sheet before delivery day, and confirm placement using our porta potty placement guide so units sit close enough to cut walk time without blocking access lanes.
There is no published osha portable toilet distance requirements number for toilet-to-work spacing on construction sites, so placement comes down to practical access and code compliance layered on top. What OSHA 1926.51(a)(1) does require is an adequate supply of potable water at the workplace, which affects where you stage a handwashing station rental next to the toilets. If your crew is applying paints, coatings, herbicides or insecticides, OSHA 1926.51(f)(1) kicks in separately and requires washing facilities for that contaminant exposure, distinct from general sanitation. Route access matters more than distance in practice: ADA Standards section 403.5.1 calls for a 36 inch clear route to any accessible unit, and section 405.2 caps ramp slope at 1:12 if the ground isn't level. A site in Tillmans Corner, 10.4 miles southwest of Mobile, still needs that same clear path even on a graded lot. Check our porta potty rental cost page for how placement complexity affects delivery pricing.
Not on every site, but once you cluster portable toilets, ADA Standards section 213.2 requires at least 5 percent to be accessible units, with a minimum of one no matter how small the cluster. That means a Mobile job site with four standard units needs one ADA accessible porta potty in the mix. The accessible unit itself has to meet real dimensions: a 32 inch clear door opening under section 404.2.3, a 60 inch turning circle inside per section 304.3.1, and stable, slip-resistant flooring under section 302.1. Reach ranges matter too, capped at 48 inches high and 15 inches low per section 308.2.1, and door hardware has to operate with one hand and no more than 5 pounds of force under section 309.4. Skipping this on a permitted event in Mobile, like a festival layout covered under festival restroom rental planning, is the fastest way to fail an inspection walk-through. Our ADA restroom requirements page breaks down every dimension in one place.
General sanitation goes beyond the toilet count. 29 CFR 1910.141(d)(2) requires washing facilities to have soap and towels or a hand-drying device, and hand sanitizer alone does not satisfy that rule for general industry workplaces. Construction crews fall under 1926.51(c) for the toilet ratio itself, but plenty of Mobile contractors add a portable sink rental or a full handwashing station rental anyway to keep crews compliant and clean between tasks. Agricultural operations run under a different rule entirely: OSHA 1928.110 requires field sanitation with potable water, toilets and handwashing within a quarter mile walk of hand-labor employees, one facility per 20 workers. That matters for farm sites outside Mobile proper, and our farm and agricultural restrooms page covers that ratio in more depth. Housekeeping rules under OSHA 1926.25 also require debris cleared from work areas, which ties sanitation planning to your roll-off dumpster rental schedule more than most contractors expect.
| unit | day | week | month |
|---|---|---|---|
| standard | $100-$350 | $130-$500 | $125-$325 |
| ada | $200-$400 | $200-$400 | n/a |
| deluxe | $85-$1200 | $150-$290 | n/a |
Weekend rates run separately from the daily and weekly bands above; a standard unit weekend rental typically lands near $250. For long-duration jobs, our monthly porta potty rental page has the full breakdown, and porta potty rental per day covers short jobs like a Daphne punch-list, 16.8 miles east of Mobile.
Yes, if workers are present. OSHA 1926.51(c)(1) sets the minimum ratio starting at one unit for crews of 20 or fewer, with no site-size exemption. A one-day punch-list job still needs a unit if a worker is on site for the shift, even a short one near Chickasaw, 11.5 miles north of Mobile.
A 50-person crew falls into the 20-to-200 tier under OSHA 1926.51(c)(1), requiring 1 toilet seat and 1 urinal per 40 workers. That works out to two full setups for 50 people. Round up, not down, and check our OSHA portable toilet requirements math again before ordering, the same how many porta potties do i need osha question every crew lead asks before a bid goes out.
Cal/OSHA rules apply only in California and are not part of this fact set for Alabama sites, and cal osha portable toilet requirements and cal osha portable toilet requirements construction ratios do not govern Mobile jobsites. Mobile contractors follow federal OSHA 1926.51(c)(1) for construction ratios. If you're bidding multi-state work, or searching for portable toilet rental oshawa because a crew is working across the border, confirm which standard governs the jobsite before finalizing your restroom count.
Construction ratios come from OSHA 1926.51(c)(1), but events aren't construction workplaces and typically plan by attendance instead. See event restroom rental or wedding restroom rental for attendance-based planning rather than the worker-count table used on job sites.
ANSI/PSAI Z4.3 sets a baseline of one service visit per week for up to 10 users across a 40-hour week. Heavier-use sites need more frequent pumping. Our how often are porta potties cleaned page covers scheduling for busier Mobile job sites and multi-day events.
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