What does OSHA 1926.51(c) actually require?
The rule is a ratio, not a flat number. Crews of 20 or fewer need just 1 unit. Once you cross 20 workers, OSHA 1926.51(c)(1) calls for 1 toilet seat and 1 urinal per 40 employees, and that ratio holds until you hit 200 workers, where it drops to 1 per 50. Longmont contractors often assume one unit covers a whole crew regardless of size, and that is where jobs get flagged. If your labor count changes week to week, size the order around your peak headcount, not your average day. Our construction site services page walks through how we plan for growing crews. For a fast gut check before you call, run your numbers through how many porta potties do I need. Water matters too: OSHA 1926.51(a)(1) requires an adequate supply of potable water at every jobsite, which is why most Longmont crews pair a standard porta potty rental with a nearby water source or a handwashing station rental.
Is this the same as Cal OSHA portable toilet requirements?
No. Cal OSHA rules are California's own state plan and differ from the federal ratio in places, so a crew working here follows federal OSHA 1926.51(c), not Cal OSHA. If your company operates in both states, do not assume the two rule sets match line for line. Colorado sites, including anything around Longmont, Firestone (9.5 miles east), or Lafayette (12.5 miles south), fall under the federal standard. General industry sites, meaning non-construction workplaces like warehouses or plants, use a different ratio under 1910.141(c)(1)(i) instead of the construction table. Know which standard applies before you order. If you are staffing a farm crew instead of a build site, field sanitation follows a separate rule, OSHA 1928.110, requiring one facility per 20 hand-labor employees within a quarter mile walk; see our farm and agricultural restrooms page for that setup.
Are there OSHA portable toilet distance requirements?
OSHA does not set a specific foot distance from workstations to the toilet, but the field sanitation standard for agriculture, 1928.110, does require the unit sit within a quarter mile walk of hand-labor workers. For construction, the practical rule is placement that a crew can reach without disrupting production, and that overlaps with accessibility rules. If your jobsite has any workers with disabilities, ADA Standards section 213.2 requires that at least 5 percent of clustered single-user units be accessible, with never fewer than one. Our ADA accessible porta potty units meet the clear width requirements under ADA 403.5.1, a 36 inch accessible route, and the 32 inch clear door opening called for in ADA 404.2.3. Placement also needs a stable, firm, slip-resistant surface per ADA 302.1. See our porta potty placement guide for how we handle uneven Longmont lots, gravel pads, and slope.
How many porta potties do I need for my Longmont crew?
The math starts with headcount, not guesswork. A 15-person framing crew needs just 1 unit under the 20-or-fewer rule. A 60-person crew crosses into the 40-person ratio and needs at least 2 toilet seats and 2 urinals. Here's how that breaks down:
| Crew size | Units required under 1926.51(c)(1) |
|---|---|
| 1 to 20 | 1 toilet |
| 21 to 40 | 1 toilet seat, 1 urinal |
| 41 to 80 | 2 toilet seats, 2 urinals |
| 81 to 120 | 3 toilet seats, 3 urinals |
| 200 or more | 1 seat, 1 urinal per 50 workers |
A standard unit rents for a typical 150 dollars a day or 200 dollars a week in Longmont, with monthly rates running higher for long builds. Multi-unit jobs usually add a delivery fee, and our porta potty rental cost page breaks down what drives that number up or down. For jobs running past a month, check monthly porta potty rental pricing before you commit to weekly renewals. Crews doing painting, coating, or pesticide work need washing facilities under OSHA 1926.51(f)(1), which is separate from the toilet count and applies specifically to those contaminant tasks; a portable sink rental or handwash station covers that requirement.
Do I need a permit to place a porta potty in Longmont?
Placement in the public right of way needs confirming with the city of Longmont before delivery. We do not guess at ordinance numbers we have not verified. Check our porta potty permit requirements page, or ask us directly when you request a quote; we will flag it if your site sits on a curb, sidewalk, or road easement.
What happens if my crew size changes mid-project?
Order for your peak headcount, not your starting crew. If a 25-person crew grows to 45, you cross a ratio threshold under 1926.51(c)(1) and need a second unit. Our emergency porta potty rental service can add units fast if a project scales up faster than planned.
Does OSHA require handwashing at every construction site?
Not automatically. General jobsite handwashing is not a blanket OSHA mandate. Washing facilities are specifically required under 1926.51(f)(1) for work involving paints, coatings, herbicides, or insecticides. Where required, 29 CFR 1910.141(d)(2) calls for soap and towels or a drying device; hand sanitizer alone does not satisfy it.
Can one portable toilet serve a 50-person crew?
No. Under 1926.51(c)(1), a crew over 40 people needs at least 2 toilet seats and 2 urinals. One unit only covers crews of 20 or fewer. Undercounting is one of the most common OSHA findings on Longmont jobsites we service.
What is the difference between a standard and deluxe unit for compliance?
OSHA does not require deluxe features, only functional toilets and water access. A deluxe flushable porta potty adds comfort, not compliance. For crews needing more capacity per unit, an 8 stall restroom trailer can also satisfy the seat count on larger sites.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.