Porta Potty Rental for School Events in Phoenix
School carnivals, field days and graduations can bring 1,500 people for 3 hours. The PSAI chart puts that near 9 units. The Maricopa County minimum for a public gathering without adequate restrooms is 15. Campus restrooms can cut the need.
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Pinal County exempts school events from the special event permit, though portable toilet permits may still apply.
Kids use restrooms often. Put units near food and play areas, and include accessible units.
The numbers for school events
Event restroom calculator
Units that fit
Standard Porta Potty
Truck access and a reasonably level pad. No water, no power.
ADA Accessible Porta Potty
A wider, level pad and an accessible route to the door.
Hand Sanitizer Station
Flat ground. Nothing else.
Porta Potty with Baby Changing Station
Same as a standard or accessible unit.
Planning checklist
- Ask which campus restrooms will be open.
- Place units near food and play areas.
- Include accessible units.
- Add sanitizer stands.
The rules that apply
| Source | What it says |
|---|---|
| Pinal County Ord. 2.151.040 | Small special events apply 60 days ahead; large events (1,000+ participants) apply 120 days ahead. The ordinance sets no toilet ratio. |
| Maricopa County Environmental Health Code, Ch. II Sec. 6 Reg. 5 | Public gatherings without adequate permanent toilets need at least 1 toilet per 100 attendees (or as the health officer requires), within 200 feet. |
| PSAI Extended Special Event Chart | Industry planning chart. Example: 1,000 guests need about 4 units for 1 hour, 8 for 4 hours and 12 for 8 hours. Add 20 to 30% when it is 80F or hotter or alcohol is served. |
| 2010 ADA Standards 213.2 Exception 3 | Where single-user portable toilets are clustered, at least 5% of the units in each cluster must be accessible, rounded up. 20 units means 1 accessible unit; 21 units means 2. |
Summaries checked against the source on 2026-11-03. Always confirm with your permitting office.
Questions people ask
Do school events need permits?
Pinal County exempts school events from the special event permit. Check Maricopa and city rules.
How many units for a graduation?
Use headcount and hours, and count open campus restrooms.
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