OSHA requires 1 toilet for every 20 workers on a construction site, per 1926.51(c). Above 20 workers, the ratio shifts to 1 toilet seat and 1 urinal per 40 people, and it changes again at 200 workers. Pittsburg contractors use this ratio to plan construction site services before crews mobilize, and it's the same math behind cal osha portable toilet requirements construction crews follow statewide, whether the job sits in Pittsburg or a job site up in Oshawa.
Osha portable toilet requirements construction crews rely on come down to a simple headcount ratio, and getting it right up front saves a callback mid-project.
Start with the headcount, not the site size. OSHA 1926.51(c) sets the baseline: 20 workers or fewer needs 1 unit, and every additional 40 workers adds one toilet seat and one urinal up to 200 people. A 15-person framing crew in Pittsburg needs just one standard porta potty rental, but a 60-person site crosses into the next tier and needs two. Our own how many porta potties do I need guide walks through the math with worked examples. Don't guess. Undercounting means lines at break time and a citation risk if an inspector counts heads against units. Crews doing renovation work should check home renovation porta potty guidance too, since smaller residential jobs still fall under the same ratio once subcontractors are on site. Water matters here as well: 1926.51(a)(1) requires an adequate supply of potable water at every place of employment, which is why most contractors pair toilets with a handwashing station rental rather than relying on sanitizer alone.
Federal OSHA sets the toilet-to-worker ratio; California enforces it through Cal/OSHA, which follows the same 1926.51(c) framework for construction, so cal osha portable toilet requirements mirror the federal table rather than replacing it. The core numbers don't change: 1 unit per 20 workers, then 1 seat and 1 urinal per 40 up to 200. What does change locally is enforcement and placement expectations, and that's worth confirming directly with the city before final unit placement, since public right-of-way rules vary by block in Pittsburg. If your project sits near a public sidewalk or curb, check our porta potty placement guide and our porta potty permit requirements page first. Farm labor operations follow a separate standard: 1928.110 requires field sanitation with one facility per 20 hand-labor employees, reachable within a quarter mile, which matters for growers doing farm and agricultural restrooms work near Oakley, 13.7 miles east of Pittsburg.
OSHA doesn't set a hard footage number for toilet placement on general construction sites, but it does require units be reasonably accessible during the shift, and 1928.110 sets a quarter-mile walk limit specifically for agricultural field sanitation. For general construction, the practical rule is: put units where workers can reach them without losing work time, and keep access clear per 1926.25 housekeeping standards so debris doesn't block the path. Lighting matters after dark; 1926.56(a) sets minimum illumination for active work areas, which applies if crews use units during early or late shifts and you've brought in a light tower rental. If the site spans multiple zones, distribute units rather than clustering them, and route delivery trucks with the same care you'd give a roll-off dumpster rental, since a standard delivery truck needs about 60 feet of straight clearance behind it to place either unit type.
Yes, once units are clustered. ADA Standards section 213.2 requires that where portable toilets are grouped together, at least 5 percent of the units, and never fewer than one, must be wheelchair accessible. That accessible unit needs a 32 inch clear door opening under section 404.2.3, a 36 inch clear route under 403.5.1, and a 60 inch turning circle inside per 304.3.1. Our ADA accessible porta potty units meet those specs, and pricing runs in the table below. For events or job sites near Brentwood, 14.1 miles southeast, or Martinez, 14.8 miles west, the same ADA math applies regardless of which side of the county line the site sits on. Handwashing stations tied to the restroom cluster should follow 29 CFR 1910.141(d)(2), which requires soap and towels or a hand-drying device; hand sanitizer alone does not satisfy that standard.
| unit | duration | typical price |
|---|---|---|
| standard | day | $150 |
| standard | week | $200 |
| ada | day | $230 |
| ada | week | $185 |
| deluxe | week | $250 |
Pricing above reflects measured rates across the region; see porta potty rental cost and porta potty rental per day for the full breakdown, or monthly porta potty rental if the job runs long. Longer jobs near Pleasant Hill, 15.0 miles southwest, often shift from daily to weekly billing once the schedule passes a week.
Not automatically. 1926.51(f)(1) specifically requires washing facilities where workers apply paints, coatings, herbicides or insecticides. General labor sites fall under the broader sanitation rule in 1926.51(c) instead. Painting crews and pesticide applicators in Pittsburg should still add a portable sink rental to stay covered.
A 50-person crew crosses the first tier at 20 workers, so the ratio becomes 1 toilet seat and 1 urinal per 40 workers. That puts a 50-person site at two combined units minimum under 1926.51(c). Check OSHA portable toilet requirements math again if headcount fluctuates by shift.
Yes, but event math differs from OSHA's worker ratio since attendees, not employees, drive the count. See event restroom rental or festival restroom rental for guest-based planning instead of the 1926.51(c) worker ratio.
No, but they share a job site logistics conversation. A storage container rental or roll-off dumpster rental needs its own clearance, while sanitation units follow 1926.51(c) separately based on crew size.
The OSHA 1926.51(c) ratio referenced on this page is a US federal construction standard, so a portable toilet rental oshawa crew would instead follow Canadian provincial rules, not this table; confirm local requirements directly if you're working outside Pittsburg. The same goes for a storage container rental oshawa site might need alongside sanitation units, since container placement and toilet ratios are governed separately.
Inspectors can cite the ratio violation directly under 1926.51(c), and it's an easy headcount check. Request a quote through Pittsburg Porta Pros before mobilization so unit count matches crew size from day one, not after a walk-through.
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