OSHA requires 1 toilet per 20 workers on a crew of 20 or fewer, under 1926.51(c)(1). Above 20 workers, the ratio shifts to 1 toilet seat and 1 urinal per 40 workers, then 1 per 50 once headcount hits 200. Portland job sites still have to hit that math to pass inspection.
Start with your peak headcount, not your average. OSHA 1926.51(c)(1) sets the baseline: 20 workers or fewer gets 1 toilet, 20 to 199 workers gets 1 toilet seat plus 1 urinal per 40 people, and crews of 200 or more drop to a 1-per-50 ratio. A 35-person framing crew in Portland needs 1 toilet and 1 urinal to clear that second bracket. Run the numbers before you call, because guessing usually means under-ordering. Our how many porta potties do I need guide walks through the math with worked examples. If you are staffing up fast, the emergency porta potty rental option gets units on site same day. For jobs that will run months rather than weeks, a monthly porta potty rental usually pencils out cheaper than renewing short-term.
| duration | low | typical | high |
|---|---|---|---|
| day | 100 | 150 | 350 |
| week | 130 | 200 | 500 |
| month | 125 | 200 | 325 |
Standard unit pricing above covers a single toilet, not a bank of units. Multiply by your OSHA-required count to budget a whole site. See porta potty rental cost for the full cost breakdown, or porta potty rental per day if you only need coverage for a short pour or inspection day.
OSHA does not publish a hard distance number in feet for portable toilet placement on construction sites; that gap is real, and any site claiming an exact figure is guessing. What OSHA does require is accessibility: units have to be reachable during work hours without hazard, and ADA-compliant units must have a 60 inch turning circle per ADA Standards 304.3.1 and a 32 inch clear door opening per ADA Standards 404.2.3. Where you cluster multiple units, at least 5 percent must be accessible, per ADA 213.2, with a minimum of one unit regardless of total count. Our porta potty placement guide covers ground stability, per ADA 302.1's slip-resistant surface standard, and clearance for service trucks. If you are placing units near a public sidewalk in Portland, confirm right-of-way placement with the city before delivery, since that permission is not standardized and needs a direct check with the city rather than a guess. Full detail on required paperwork lives at porta potty permit requirements.
Cal OSHA applies in California, not Oregon, so a Portland job site follows federal OSHA 1926.51(c)(1) directly, not the California variant. The ratios are functionally similar in structure (headcount bands driving toilet and urinal counts), but Oregon OSHA enforces the federal construction standard here, and that is the rule your Portland superintendent needs on file. Don't let a Cal OSHA PDF from a California GC override what applies on your Multnomah County site. For general industry workplaces rather than construction, the ratio comes from 1910.141(c)(1)(i) instead, a separate standard with its own bands. Confirm which standard applies to your Portland job type before ordering units, and check OSHA portable toilet requirements against your specific crew classification. A standard unit for a Portland crew runs the same measured price band whether you are doing residential remodel work covered by home renovation porta potty needs or full construction site services.
General sanitation under 1926.51(c) does not by itself mandate a handwashing station at every toilet, but a separate trigger does: 1926.51(f)(1) requires washing facilities where workers apply paints, coatings, herbicides or insecticides, or handle other harmful contaminants. A framing crew with no chemical exposure may not trigger that rule; a crew spraying stain or herbicide on a Portland landscaping job does. Where handwashing is required, 29 CFR 1910.141(d)(2) specifies soap and towels or a hand-drying device; hand sanitizer alone does not satisfy it. Pair your toilet order with a handwashing station rental or a portable sink rental if your scope includes any of those contaminant categories. Full detail on which jobs trigger the rule sits at handwashing station requirements. Portland crews working within 8.9 miles of Raleigh Hills or out toward Milwaukie, 8.3 miles south, face the same federal standard regardless of which side of the metro they're on.
1926.51(c)(1) is the construction standard: 1 toilet for 20 workers or fewer, scaling to 1 toilet seat and 1 urinal per 40 workers above that, then 1 per 50 at 200-plus workers. It's specific to construction, separate from the general industry ratio in 1910.141(c)(1)(i).
No. Agricultural field sanitation falls under OSHA 1928.110, which requires one facility per 20 hand-labor employees, reachable within a quarter-mile walk. That's different math than the 1926.51(c)(1) construction bands. See farm and agricultural restrooms for Portland-area setups.
Only where clustering applies. ADA Standards 213.2 requires at least 5 percent of clustered single-user units to be accessible, never fewer than one. A single standalone toilet on a small job may not trigger that rule. Details at ADA accessible porta potty.
OSHA itself doesn't set a weekly service number; that comes from ANSI/PSAI Z4.3, which sets one visit per week as the baseline for up to 10 users over a 40 hour week. Heavier crews need more frequent pumping. See how often are porta potties cleaned.
Yes. Portland Porta Pros can add units fast when headcount jumps mid-project. Weekend and short-term rates apply differently than weekly or monthly terms, so call ahead with your new headcount. Check emergency porta potty rental for same-day options.
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