How many toilets does a Maricopa County site need?
The Maricopa County code, as we found it, asks for one toilet per 20 people on a construction site, within 200 feet of each work area. The copy we saw is dated 2011 and may have been amended. Confirm the figure with the county and your safety lead.
Twenty people per toilet is a floor, not a target. A crew of 60 needs at least three, and the 200-foot rule means they cannot all sit at one end of the lot. On a large site, units end up in two or three clusters.
Federal OSHA also has sanitation rules for construction sites. We have not reviewed them for this page, so check OSHA directly. See the construction site guide for more.
What are Arizona's heat-safety rules for outdoor workers?
An August 1, 2026 news report said Arizona outdoor workers are now covered by first-ever statewide heat-safety rules enforced by ADOSH, the Arizona Division of Occupational Safety and Health. We have not confirmed the rule text or what it requires of toilets or water. Check the Industrial Commission of Arizona.
That is as far as we go. Employers should read the rules, ask ADOSH or the Industrial Commission of Arizona what applies, and plan toilets, water and shade with that in mind. Federal OSHA publishes its own heat guidance for employers, and it is the place to read it.
This site makes no claim about what heat does to a person. For that, ask a doctor.
Why does the West Valley matter for site toilets?
The metro had about 21.4 million square feet of industrial space under construction in early 2026, mostly in the West Valley and around Mesa Gateway, according to an industrial market report. Sites there are large, with long distances between work areas, so toilets are placed in several clusters.
West Phoenix is reported as the most active zone for new warehouse and distribution construction, and Glendale planned a 471,000 square foot, three-building park on the 101 corridor with construction starting in the third quarter of 2026. Big flat sites spread the crew over a wide area.
For those jobs, see the industrial and warehouse page. A provider with a route through the West Valley is often a better fit than one across the metro.
How should a contractor plan servicing in summer?
Heat speeds waste breakdown and odour and weakens deodoriser, so many Phoenix-area providers suggest more frequent service in peak heat, with twice-weekly visits often mentioned as a practical baseline. That is common advice, not a rule. Agree the schedule with the provider.
Shade and ventilation help. A unit under a shade structure or on the north side of a building stays cooler than one in full sun. Ask the provider what it recommends, and tell it if the site has shade.
Put the schedule in the quote and tell the crew which days the units are serviced. A unit that is serviced just before the crew starts the week lasts through the busiest days.
How do multiple trades share toilets on one site?
The general contractor usually owns the site toilets and counts every trade's workers toward the total. A subcontractor who starts work should ask the general contractor what is provided before ordering its own units. Duplicates waste money and space.
Shared sites cause confusion. Three trades each assume another is providing the toilets, and the crew finds one unit for sixty people. Settle the question at the preconstruction meeting and put the count in writing.
If a subcontractor does order its own units, tell the general contractor where they will stand and who will service them. Units that block a haul road or a hoist area become a problem for everyone.
What should a site manager track?
Peak headcount by day, the distance from each work area to the nearest unit, the servicing days, and the condition of the units. A weekly check keeps the count right as the crew grows. A simple log of service visits settles any dispute with the provider.
None of this is complicated, and all of it prevents trouble. A foreman who knows the units are checked each Monday will not be surprised by a full tank on Friday.
- Peak headcount and how it changes by phase
- Distance from each work area to a toilet
- Servicing days and who confirmed each visit
- Stock of paper, soap and sanitiser
- Any damage or tipping after wind or a storm
