Porta Potty Rental for Construction Sites in Phoenix
Construction sites in Maricopa County need at least 1 toilet per 20 workers within 200 feet of each work area. That county rule is stricter than OSHA Table D-1 for small and mid-size crews, so most Valley jobsites plan to the county number.
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OSHA sets the federal floor: 1 toilet for 20 or fewer workers, then 1 seat and 1 urinal per 40. Maricopa County asks for 1 per 20 at every size and adds the 200 foot distance. In Pinal County, the county code sets no ratio, so OSHA is the floor there.
Units used only by your crew are exempt from ADA accessibility (2010 ADA Standards 203.2). If clients, inspectors or the public use them, plan an accessible unit.
The numbers for construction sites
Jobsite toilet calculator
Units that fit
Standard Porta Potty
Truck access and a reasonably level pad. No water, no power.
Hand Washing Station
A level spot. No hookups.
High-Rise Crane Porta Potty
Crane picks, a level landing spot on the floor, and a plan for servicing.
Holding Tank
A level spot near the fixture and truck access for pumping.
Planning checklist
- Count your peak crew, not your average crew.
- Put units within 200 feet of each work area as the building spreads out.
- Ask for weekly service at minimum, more in summer.
- Add a hand wash station near concrete and paint work.
The rules that apply
| Source | What it says |
|---|---|
| OSHA 29 CFR 1926.51(c), Table D-1 | Construction sites: 1 toilet for 20 or fewer workers; 1 seat and 1 urinal per 40 workers at 20 or more; 1 seat and 1 urinal per 50 workers at 200 or more. |
| Maricopa County Environmental Health Code, Ch. II Sec. 6 Reg. 5 | Construction sites need at least 1 toilet per 20 persons, within 200 feet of each work area. |
| OSHA interpretation letter, May 17 2006 | A toilet that is unsanitary or too far away is not "provided." The letter points to ANSI Z4.3, which calls for a unit used by up to 10 people to be serviced at least weekly. |
| 2010 ADA Standards 203.2 | Portable toilets used only by construction personnel on a construction site are exempt from the accessibility requirements. |
| Maricopa County Solid Waste Permitting | Portable restroom units made available for use must be permitted by the county. Ask any operator for their county permit. |
Summaries checked against the source on 2026-11-03. Always confirm with your permitting office.
Questions people ask
How many porta potties does a jobsite need?
In Maricopa County, 1 per 20 workers within 200 feet. OSHA alone allows 1 seat and 1 urinal per 40 above 20 workers.
How often must jobsite units be serviced?
OSHA's 2006 letter points to ANSI Z4.3: at least weekly for a unit used by up to 10 people.
Related uses
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