How many porta potties do I need for a jobsite?
Start with the OSHA table, not a guess. Under OSHA 1926.51(c), a crew of 20 workers or fewer needs 1 toilet facility. From 20 up to 200 workers, add 1 toilet seat and 1 urinal per 40 workers. At 200 or more, the ratio drops to 1 per 50. A 15-person framing crew in Davis needs 1 unit. A 60-person site needs 2. Bring a lift or aerial crew into the mix and you'll want to check construction site services for placement near the work zone, not just the trailer. If the crew is doing paint, coatings, herbicide or insecticide work, OSHA 1926.51(f)(1) kicks in and washing facilities become mandatory, not optional. Most contractors renting a standard porta potty rental for a single crew pay the day or week rate; longer jobs run month to month, and the monthly porta potty rental page breaks that down further.
How many porta potties do I need for an event?
| Guests | Hours | Units (no alcohol) | Units (with alcohol) |
|---|---|---|---|
| 50-100 | 4 | 2 | 3 |
| 100-250 | 4 | 4 | 6 |
| 250-500 | 4 | 8 | 11 |
| 500-1000 | 4 | 16 | 20 |
Alcohol adds roughly 25 to 30 percent more units because guests drink more fluid and use the restroom more often per hour. A wedding of 150 guests over 5 hours with a bar needs more than the table above shows for a straight 4 hour block; add one unit per extra hour past 4 for groups over 150. Check wedding restroom rental or event restroom rental for package options built around exactly this kind of scaling. Multi-day festivals compound the math again since waste accumulates and servicing gets harder each additional day; the festival restroom rental and county fair restrooms pages walk through servicing frequency for those longer runs.
Worked example: 15-person Davis job site
A framing crew of 15 working an 8 hour day, 5 days a week, falls under the 20-or-fewer bracket in OSHA 1926.51(c): 1 toilet unit covers it. If the crew works within 2.9 miles of University of California-Davis, near a job pulling students or overflow labor from campus, delivery logistics stay simple since it's a short haul from a Davis yard. A standard porta potty rental at the day or week rate covers this job cleanly, and if the job runs past a month, switch to the monthly rate through the monthly porta potty rental page. Add a handwashing station regardless of crew size; 29 CFR 1910.141(d)(2) requires soap and towels or a hand-drying device, not sanitizer alone, wherever workers wash up. A handwashing station rental or portable sink rental satisfies that requirement without adding a second toilet unit.
Worked example: 300-guest Davis wedding
Three hundred guests over 5 hours with a hosted bar pushes past the baseline in the event table above. Straight math off the 250-500 bracket puts you near 8 units for 4 hours; add roughly 2 more units for alcohol, then 1 or 2 more for the extra hour, landing around 10 to 12 units total. At least one of those needs to be accessible per ADA Standards section 213.2, which requires 5 percent of clustered units to meet accessibility standards, with a minimum of one. A deluxe flushable porta potty or two upgrades the guest experience past a standard bank of units, and pairing that with an ADA accessible porta potty rental covers both comfort and compliance. Venues near El Macero, 4.5 miles east of Davis, or out toward Winters, 14.8 miles west, sometimes lack existing plumbing entirely, which is where a full restroom trailer rental replaces a bank of standalone units.
Do I need more units for a multi-day event?
Yes, and servicing frequency matters more than raw unit count. ANSI/PSAI Z4.3 sets a baseline service interval of once per week for up to 10 users over a 40 hour week. A single-day festival never hits that ceiling, but a 3-day event with heavy foot traffic can blow past it fast, especially with alcohol service extending hours each night. Rather than double unit count, most organizers in Davis add a mid-event service call. The 8 stall restroom trailer or 4 stall restroom trailer options reduce the number of individual units to service and consolidate the waste tank into one larger holding system. For anything running past a weekend, check the restroom trailer rental cost page before locking in a headcount-based unit order, since trailers price by day, week or event flat rate rather than per unit.
How does alcohol change the calculation?
Alcohol increases both frequency of use and fluid intake, so add 25 to 30 percent more units than a dry event of the same size and duration. A 200-guest dry event over 4 hours might land at 4 units; the same event with a full bar pushes toward 5 or 6. Multi-hour cocktail receptions see heavier early use as guests arrive and start drinking immediately, front-loading demand rather than spreading it evenly across the event window. Golf tournaments and concerts follow the same logic; the golf tournament restrooms and concert restroom rental pages both build alcohol adjustment into their standard package sizing. If you're unsure which bracket your event falls into, a request a quote conversation is faster than working the math alone, since crew size, bar hours and guest flow all shift the number in different directions at once.
What about ADA-compliant units?
Under ADA Standards section 213.2, where single-user portable toilet units are clustered, at least 5 percent must be wheelchair accessible, with a minimum of one unit regardless of cluster size. That means even a small event with only 4 or 5 standard units still needs one accessible unit on site. ADA Standards section 304.3.1 requires a 60 inch turning circle inside that unit, and section 404.2.3 sets a 32 inch minimum clear door opening. Placement matters too: ADA Standards section 403.5.1 calls for a 36 inch clear route to the unit, and section 405.2 limits any ramp to a 1:12 slope if the ground isn't flat. Davis events held on turf or gravel, including anything near Monument Hills 16.0 miles northwest, should confirm ground stability against ADA Standards section 302.1 before placing an accessible unit. The ADA accessible porta potty rental page covers unit specs in full.
How many porta potties do I need for 100 people?
For 100 guests over 4 hours without alcohol, plan on 4 units. Add 1 or 2 more if there's a bar, and one of those units needs to meet ADA Standards section 213.2 for accessibility. Multi-day events at that headcount should add a mid-event service call rather than more units.
How many tons does a 30 yard dumpster hold?
Dumpster tonnage depends on material density more than volume, and exact weight capacity isn't listed in our spec sheet here. Check 30 yard dumpster rental or dumpster weight limits for the range that applies to your material type before booking.
How many cubic feet are in a 10 yard dumpster and a 20 yard dumpster?
A cubic yard equals 27 cubic feet, so a 10 yard dumpster holds 270 cubic feet and a 20 yard dumpster holds 540 cubic feet. Actual box dimensions vary by manufacturer. See dumpster sizes and dimensions for length, width and height specifics.
How many feet is a 20 yard dumpster?
Exact length and width vary by manufacturer, and we don't have a single fixed spec to quote here. The dumpster sizes and dimensions page lists dimensions by size so you can match the box to your driveway or lot clearance.
Do I need a permit for a porta potty in Davis?
Placement in the public right of way needs confirming with the city; permit rules aren't listed here. The porta potty permit requirements page walks through what to ask before delivery day.
How far in advance should I book?
Standard jobsite rentals can often be arranged within a few days, but events over 100 guests or requiring an ADA accessible porta potty rental or restroom trailer should book several weeks out. Peak wedding and festival season fills delivery slots fast across service areas near Davis.
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