OSHA requires one toilet for every 20 workers on a job site with 20 or fewer people, per 1926.51(c). Crews between 20 and 200 need one toilet and one urinal per 40 workers. Kansas City Porta Pros builds every job quote around that ratio so contractors do not get caught short on inspection day.
Start with your headcount, then apply 1926.51(c). Twenty workers or fewer means one unit. Cross 20 and you owe one toilet seat plus one urinal per 40 workers, and once you hit 200 workers the ratio drops to one seat and one urinal per 50. A 35-person framing crew working outside Kansas City needs two units, not one, because 35 falls into that second bracket. Contractors bidding jobs near North Kansas City, 2.6 miles northwest, or out toward Liberty, 15 miles northeast, use the same math since OSHA is federal, not municipal. If you are unsure where your crew size lands, our how many porta potties do I need guide walks the brackets in more detail. Agricultural operations fall under a separate standard, 1928.110, which calls for one facility per 20 hand-labor employees within a quarter mile walk, which matters for farm operations working land toward Raytown or beyond. Get your count wrong on a permitted job and you risk a stop-work order, so we size every construction site services quote to the actual crew number, not a guess.
OSHA does not set a hard footage number for how far a toilet can sit from a work area, but it does require the units be reasonably accessible during the shift. Where the standard gets specific is illumination and access: 1926.56(a) sets minimum lighting for work areas including sanitation stations, and 1926.202 requires barricades meeting ANSI D6.1 if the unit sits near vehicle traffic or an excavation. Our porta potty placement guide covers ground stability, service truck access and wind exposure, all of which matter more in practice than a theoretical distance rule. A roll-off truck needs about 60 feet of straight clearance behind it to service a roll-off dumpster rental, and the same access thinking applies to positioning a toilet where our truck can reach it weekly without driving across wet ground. Housekeeping standard 1926.25 also comes into play, since a toilet blocked by debris or scrap material is functionally noncompliant even if it technically sits on site.
Not automatically. General handwashing at a typical Kansas City job site is not mandated the same way toilets are. But 1926.51(f)(1) requires washing facilities specifically where workers apply paints, coatings, herbicides or insecticides, or work around other harmful contaminants. A painting crew or a landscaping outfit spraying herbicide near Gladstone, 8.2 miles north, triggers that rule the moment the sprayer comes out. General industry sites, as opposed to construction, follow 1910.141(c)(1)(i) for toilet ratios and 1910.141(d)(2) for washing facilities, which requires soap and towels or a hand-drying device. Hand sanitizer alone does not satisfy that rule. We stock a handwashing station rental and a portable sink rental for crews that need to stay ahead of it, and our handwashing requirements page breaks down which trigger applies to which job type. OSHA 1926.51(a)(1) separately requires an adequate supply of potable water at every place of employment, which is a distinct obligation from washing facilities.
OSHA itself does not enforce ADA standards, but plenty of Kansas City event permits and some commercial job specs require at least one accessible unit regardless. ADA Standards 213.2 says that where portable toilets are clustered, at least 5 percent, and never fewer than one, must be accessible. That accessible unit needs a 60 inch turning diameter under 304.3.1, a 32 inch clear door opening under 404.2.3, and a stable, slip resistant floor under 302.1. We rent ADA accessible porta potty units built to that spec for job sites and public events alike, including races and festivals near Overland Park, 23.7 miles southwest. Pricing on those units runs by the day or week; see the table below. For general project budgeting beyond ADA units, our porta potty rental cost and porta potty rental per day pages break down what drives the number up or down.
| unit | day | week |
|---|---|---|
| ADA accessible | $200 to $400 | $240 |
| Standard | $100 to $350 | $130 to $500 |
Longer jobs often make more sense as a monthly porta potty rental instead of paying day rates week after week. If your project also needs waste containment, pair your toilets with a construction dumpster rental or a temporary fence rental to keep the site secured and inspection-ready in one delivery.
Once you cross 20 workers, OSHA 1926.51(c) moves you into the second bracket: one toilet seat and one urinal per 40 employees. A 22-person crew already needs two units under that math, not one, even though it barely cleared 20.
Cal OSHA sets its own construction sanitation rules for California job sites, separate from the federal 1926.51(c) ratios used in Missouri. Kansas City projects follow federal OSHA, so contractors bidding multi-state work should confirm which standard applies before finalizing headcount.
Yes, if your crew is 20 workers or fewer, one unit satisfies 1926.51(c). Most residential jobs never approach that threshold. See our home renovation porta potty page for typical single-unit setups.
No. OSHA 1926.51(c) governs employee headcount on construction sites, not public attendees at festivals or weddings. Event restroom counts are typically driven by guest count and duration instead; see event restroom rental for that math.
No, under 1910.141(d)(2) hand sanitizer does not substitute for soap and running water or a hand-drying device. That standard applies to general industry sites, while 1926.51(f)(1) governs construction crews using paints, coatings or pesticides.
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