Porta Potty Rental for Solar Farm Construction in Phoenix
A solar farm build with 250 workers needs at least 13 toilets in Maricopa County (1 per 20), within 200 feet of each work area. OSHA alone would require 5 seats and 5 urinals at that crew size. Spread across open desert, distance usually drives the count up.
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Utility-scale solar sites in the west Valley and Pinal County cover huge areas. The 200 foot rule in Maricopa County means units have to move with the crews as rows go in.
Heat is the other driver. Summer service frequency matters for odor and worker comfort.
The numbers for solar farm construction
Jobsite toilet calculator
Units that fit
Standard Porta Potty
Truck access and a reasonably level pad. No water, no power.
Towable Porta Potty Trailer
A hitch and a truck. Level parking at each stop.
Hand Washing Station
A level spot. No hookups.
Holding Tank
A level spot near the fixture and truck access for pumping.
Planning checklist
- Map units by work zone, not by headcount alone.
- Use towable units for crews that move.
- Add wash stations near staging areas.
- Plan summer service twice a week or more.
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 for a large jobsite?
In Maricopa County, 1 per 20 workers. Above 200 workers, OSHA allows 1 seat and 1 urinal per 50, but the county rule is stricter.
How far can units be from workers?
Within 200 feet of each work area under the Maricopa County code.
Related uses
All uses | Service area | Answers