How Many Portable Toilets Does OSHA Require?
The count comes straight from OSHA 1926.51(c)(1). Crews of 20 or fewer need just one toilet facility. Once you cross 20 workers, the rule calls for one toilet seat and one urinal per 40 employees, and that ratio holds until you hit 200 workers, where it eases to one per 50. A 35-person crew working a job site in Denver needs two units minimum, not one, because 35 falls into the 20-to-200 bracket. Contractors sizing a job should check how many porta potties do i need osha before ordering, using our how many porta potties do I need page, since crew size changes week to week on most builds. Standard units run about 44 by 48 inches on the ground and stand roughly 92 inches tall, which matters when you're planning clearance near scaffolding or material stacks. Denver Porta Pros delivers standard units sized to fit tight urban lots without blocking a sidewalk or a loading zone. If your crew count is close to a ratio breakpoint, order one extra. Inspectors do not average across the week; they count heads on the day they show up.
What Does OSHA Say About Toilet Placement and Water?
OSHA 1926.51(a)(1) requires an adequate supply of potable water at every place of employment, separate from the toilet count itself. That means a job site needs drinking water on top of restrooms, not instead of them. Placement rules for the units themselves aren't spelled out by exact footage in the construction standard, so the safest approach is a stable, accessible spot near the work area that doesn't force workers to cross active traffic or excavation. See our porta potty placement guide for layout details. If your project also involves painting, coating, herbicide or insecticide work, OSHA 1926.51(f)(1) kicks in separately and requires washing facilities for those specific contaminant exposures, not general jobsite handwashing. Pair a handwashing station rental with your toilets if any of that work is happening. General industry sites, as opposed to construction, follow a different ratio table under 1910.141(c)(1)(i), so don't mix the two standards when scoping a mixed-use property in Denver. Colorado contractors sometimes ask about cal osha portable toilet requirements or cal osha portable toilet requirements construction, but Denver jobs fall under federal OSHA, not the California program, and a company fielding a call about portable toilet rental oshawa is dealing with a different country's rules entirely.
Are ADA-Accessible Units Required on Construction Sites?
Where portable toilets are clustered, ADA Standards section 213.2 requires at least 5 percent of units to be accessible, with a minimum of one no matter how small the cluster. An accessible unit needs a 32-inch clear door opening under section 404.2.3 and a 36-inch clear route under section 403.5.1, plus a 60-inch turning circle inside per section 304.3.1. Denver Porta Pros stocks ADA accessible units built to those dimensions, with grab bars positioned for the reach ranges in ADA 308.2.1 and door hardware that meets the one-hand, 5-pound-force operation standard in section 309.4. Public-facing events in Denver, from a downtown 5K to a fairground gathering, tend to draw more scrutiny on accessibility than a fenced construction lot, so budget for at least one ADA unit even on a small job. Check our ADA restroom requirements page for the full spec sheet before you order for a permitted event.
Do Portable Toilet Requirements Change for Events or Agriculture?
Yes. Special events, farm labor, and general industry workplaces each follow a different rulebook than a construction site. Agricultural operations fall under OSHA 1928.110, which sets one facility per 20 hand-labor employees and requires it be reachable within a quarter mile walk, plus potable water and handwashing at the same location. That's a tighter geographic standard than construction work typically demands. Farms and ranches near Denver should look at farm and agricultural restrooms for a setup that meets that walking-distance rule. Event organizers planning a wedding restroom rental or a festival restroom rental aren't bound by the construction ratio at all, but venues and city permitting offices often expect similar coverage. A concert restroom rental or marathon and race restrooms job usually needs restroom placement mapped along the route or crowd flow, not just a flat headcount formula. For daily rental costs across unit types, see porta potty rental cost or porta potty rental per day.
| Unit type | Day | Week | Month |
|---|---|---|---|
| Standard | $100-$350 | $130-$500 | $125-$325 |
| ADA | $200-$400 | $185-$240 | - |
| Deluxe | $85-$1200 | $150-$290 | - |
Weekend rates run separately from the day/week/month table above; a standard unit weekend rental typically lands between $125 and $400 depending on delivery distance and duration. Job sites within 10 miles of Denver, including areas like Glendale 7.4 miles southwest or Four Square Mile 7.6 miles south, usually see lower delivery fees than sites farther out toward Littleton at 21.9 miles southwest. Roll-off delivery trucks also need about 60 feet of straight clearance behind the vehicle, worth checking before ordering a roll-off dumpster rental alongside your toilets. For jobsite storage needs, a storage container rental can hold tools and materials while your sanitation units handle crew needs.
Does OSHA require a specific number of feet between the toilet and the work area?
No fixed footage is written into 1926.51(c)(1) itself. The rule sets ratios by worker count, not distance. Practical placement should still avoid excavation edges, active traffic, and material laydown zones, per general housekeeping expectations under 1926.25.
How many porta potties do I need for a 50-person crew?
At 50 workers you fall into the 20-to-200 bracket under OSHA 1926.51(c)(1), needing roughly two units at the one-per-40 ratio, rounded up. See how many porta potties do I need for a full breakdown by crew size.
Do portable toilets need soap and towels, not just sanitizer?
Yes, under 29 CFR 1910.141(d)(2), washing facilities need soap and towels or a hand-drying device. Hand sanitizer alone does not satisfy this. A handwashing station rental paired with your toilets covers this properly.
Is a separate ADA unit required on every job site?
If units are clustered, ADA Standards 213.2 requires at least 5 percent to be accessible, minimum one. A single-unit small job site doesn't trigger a percentage requirement the same way a multi-unit cluster does. Check ADA accessible porta potty options.
Does Cal OSHA use the same ratio as federal OSHA?
Colorado follows federal OSHA construction standards, including 1926.51(c)(1), rather than California's separate Cal OSHA program. Contractors moving between states should confirm which agency has jurisdiction; our OSHA portable toilet requirements guide reflects the federal standard used across Denver.
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