OSHA Restroom Requirement Calculator

OSHA standard 29 CFR 1926.51(c) requires a minimum of 1 toilet for every 20 workers on a construction site. For sites with 200 or more workers, the requirement shifts to 1 toilet and 1 urinal per 50 workers. These are minimums — high-usage sites or longer shifts may need more units for comfort and compliance.

Yes. OSHA requires that handwashing facilities be provided near toilet facilities on construction sites. Many states also have specific requirements. Portable handwash stations with soap and clean water are the standard solution for sites without permanent plumbing.

The industry standard is once per week for normal usage (about 10 users per unit per day). For heavier usage or hot weather, twice-weekly service is recommended. Units at events or high-traffic sites may need daily service. Regular servicing keeps units sanitary and prevents overflow issues.

OSHA violations for inadequate sanitation facilities can result in fines starting at $16,131 per violation for serious offenses, and up to $161,323 for willful or repeated violations. Beyond fines, inadequate facilities hurt worker morale and productivity. It is always cheaper to rent extra units than to face penalties.