Illinois follows federal OSHA sanitation standards for construction sites, which set minimum restroom counts based on crew size: one unit for every 20 workers is the baseline, with additional units required as crews grow past that threshold. General contractors are responsible for providing units even when subcontractors bring their own crews onto the job.
Placement rules matter as much as the count. Units need to sit within a reasonable walking distance of the active work area, on stable ground, and be serviced often enough to stay usable — weekly servicing is standard, but high-crew-count sites often need twice-weekly pickups.
Contractors bidding Illinois jobs who want a straightforward breakdown of unit counts by crew size can check Illinois porta potty rentals for site-specific planning.
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