How many porta potties do construction sites need under OSHA?
The federal table in OSHA 1926.51(c) is the starting point for any jobsite in Paradise, and it scales in brackets, not a straight per-head ratio. Crews of 20 or fewer need 1 toilet facility, full stop. Once you cross 20 workers, add 1 toilet seat and 1 urinal for every 40 people, and that ratio holds until you hit 200 workers, where it eases to one seat and one urinal per 50. A 35-person framing crew falls in the 20-to-40 bracket, so two units covers it with room to spare. A 120-person site sits in the same math three times over. If you're staging a bigger job, our construction site services page walks through delivery timing and swap-out schedules, and the standard porta potty rental unit is what most crews start with. Don't forget water either: OSHA 1926.51(a)(1) requires potable water at every jobsite, which is a separate obligation from toilet count.
How many porta potties do I need for an event?
Events run on headcount and hours, not worker brackets, so the math looks different from a jobsite. A useful planning table:
| guests | duration | units needed |
|---|---|---|
| 50 | 4 hours | 2 |
| 100 | 4 hours | 3 |
| 150 | 4 hours | 4-5 |
| 250 | 4 hours | 6-7 |
| 500 | 4 hours | 10-12 |
Add roughly one unit for every additional 2 hours past the 4-hour mark, and add at least one more if alcohol is being served, since drinking drives bathroom trips up fast. A 150-guest backyard wedding in Paradise running 6 hours should budget for 6 units, not 5. For weddings specifically, check the wedding restroom rental page, and for anything with a beer garden or bar, the festival restroom rental guide covers alcohol adjustments in more depth. Multi-day festivals need a servicing plan too, not just more units, which we cover next.
Does a multi-day event change the count?
Yes, and it's less about adding units and more about servicing them. ANSI/PSAI Z4.3 sets a baseline service interval of once per week for up to 10 users across a 40-hour week, which is built for a steady office crew, not a weekend of 500 people cycling through. A 3-day event in Paradise with sustained foot traffic needs daily service on top of your unit count, not instead of it. If you under-plan servicing, units fill early on day two and you're stuck mid-event. Our emergency porta potty rental option exists for exactly that gap, but it's cheaper to build the service plan up front. For a county fair or multi-day tournament, look at county fair restrooms or golf tournament restrooms for format-specific counts.
What about ADA accessible units?
ADA Standards section 213.2 requires that when single-user portable toilets are clustered, at least 5 percent of the units be accessible, and never fewer than one. So even a small cluster of 3 or 4 units at a Paradise event needs one ADA unit in the mix. The accessible unit itself has real dimensions behind it: ADA Standards 404.2.3 sets a 32 inch minimum clear door opening, and ADA Standards 304.3.1 requires a 60 inch turning circle inside. The path to the unit matters too. ADA Standards 403.5.1 calls for a 36 inch clear route, and 405.2 caps ramp slope at 1:12 if the ground isn't level. Our ADA accessible porta potty page has the full spec sheet, and pricing sits in the table below. If you're not sure how ADA obligations apply to your specific site, the ADA restroom requirements guide breaks it down further.
How much does the right number of units cost?
Once you know your count, the next question is budget. Pricing runs by unit type and rental length, and longer terms don't always mean lower per-day cost the way people expect:
| unit | day | week | month |
|---|---|---|---|
| standard | $100-$350 | $130-$500 | $125-$325 |
| ada | $200-$400 | $200-$240 | - |
| deluxe | $85-$1200 | $150-$290 | - |
A standard unit for a Saturday event runs in the $125 to $400 weekend range in prose terms, separate from the day/week/month table above. If your job runs closer to a month, the monthly porta potty rental page has more detail, and general cost drivers are covered on porta potty rental cost. For day-rate jobs specifically, see porta potty rental per day.
Do I need extra units if my dumpster or septic setup is on-site too?
Not directly, but the same site planning applies, and people often ask about both at once. If you're renting a roll-off dumpster rental alongside your restrooms, sizing matters just as much on that side. A 10 yard dumpster runs about 12 feet by 8 feet, which answers how many feet is a 10 yard dumpster, and it holds roughly 1,360 cubic feet, answering how many cubic feet in a 10 yard dumpster, suited to smaller cleanouts. A 20 yard dumpster is closer to 22 feet long and holds about 2,720 cubic feet, carrying up to roughly 3 tons of debris depending on material, which is the rough answer to how many tons does a 20 yard dumpster hold. A 30 yard holds around 4,080 cubic feet and can carry up to about 4-5 tons, answering how many tons can a 30 yard dumpster hold, while a 40 yard tops out near 5,440 cubic feet, answering how many cubic feet in a 40 yard dumpster, and can carry up to roughly 6-8 tons, which is the ballpark answer to how many tons does a 40 yard dumpster hold. Heavier debris like concrete or shingles fills the weight limit long before the box is full, so check the dumpster weight limits page before you order. Full dimension breakdowns live on dumpster sizes and dimensions, and size-specific pages exist for the 10 yard dumpster rental, 20 yard dumpster rental, 30 yard dumpster rental and 40 yard dumpster rental. Placement rules for a dumpster in the public right of way aren't fixed here and need confirming with the city before delivery.
Where can I get help figuring out my exact count?
The fastest way is to tell Paradise Porta Pros your headcount, hours, and whether it's a jobsite or an event, and let us run the math against the OSHA 1926.51(c) brackets or the event table above. We deliver across Paradise and into nearby communities: Winchester sits 5.6 miles north, Whitney is 6.7 miles east, and Henderson is 13.1 miles southeast, so drive time rarely holds up a delivery window. If you're outside Paradise proper, our service areas page lists coverage, including porta potty rental in Las Vegas, NV 19.7 miles northwest and porta potty rental in Henderson, NV. For a full walkthrough of unit types before you call, start with portable toilet rental or the general porta potty rental in Paradise hub, then request a quote when you're ready.
How many porta potties do I need for 100 guests?
Plan on 3 units for 100 guests over a standard 4-hour event, per the ratio of roughly 1 unit per 50 people. Add a unit if you're pouring alcohol, and add an ADA unit under ADA Standards 213.2 once your cluster reaches that size.
How many porta potties does a construction site need per OSHA?
OSHA 1926.51(c) sets 1 toilet for 20 workers or fewer, then 1 toilet and 1 urinal per 40 workers up to 200, easing to 1 per 50 above that. A 35-person crew needs 2 units under this bracket.
How many tons does a 30 yard dumpster hold?
A 30 yard dumpster can carry up to roughly 4-5 tons of debris, though heavier material like concrete hits the weight cap well before the box fills. Check dumpster weight limits before loading.
How many cubic feet are in a 20 yard dumpster?
A 20 yard dumpster holds about 2,720 cubic feet and runs roughly 22 feet long. See dumpster sizes and dimensions for full measurements.
Do I need an ADA unit for a small event?
Yes, if you're clustering portable toilets at all. ADA Standards 213.2 requires at least 5 percent of units be accessible, and never fewer than one, even for a cluster of 3 or 4.
How often should porta potties be serviced at a multi-day event?
Daily service is standard for high-traffic multi-day events in Paradise, well above the ANSI/PSAI Z4.3 baseline of once weekly for light office-style use. Under-servicing is the most common reason units fail mid-event.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.