OSHA 1926.51(c) sets one toilet for every 20 workers on a construction site, scaling to one toilet and one urinal per 40 workers once the crew passes that mark. Medford contractors use this ratio to plan construction site services before the crew shows up on day one.
The math is simple once you know your headcount. OSHA 1926.51(c)(1) requires 1 toilet facility for 20 workers or fewer, then 1 toilet seat and 1 urinal per 40 workers as the site grows past 20, and 1 per 50 once you hit 200 or more. A 15-person framing crew in Medford needs one unit. A 60-person job needs closer to two toilets and two urinals under that same table. Run your own numbers with the porta potty calculator guide before you call in an order, because guessing low is the most common mistake we see on new builds. Most crews start with a standard porta potty rental and add units as headcount climbs. If the project is agricultural rather than a construction site, the ratio changes: OSHA 1928.110 calls for one field sanitation facility per 20 hand-labor employees, reachable within a quarter mile walk, which matters for anyone running farm and agricultural restrooms outside the city core.
People searching osha portable toilet distance requirements are often surprised to learn OSHA does not publish a fixed foot distance from the work area to the toilet, but it does require the facilities to be reasonably accessible, adequately ventilated, and kept in sanitary condition. Water for handwashing falls under OSHA 1926.51(a)(1), which calls for an adequate supply of potable water at all places of employment. That is separate from OSHA 1926.51(f)(1), which applies specifically when workers are applying paints, coatings, herbicides or insecticides, or handling other harmful contaminants. If your crew is spraying finishes on a Medford renovation, that clause kicks in and you need a wash station on hand, not just a toilet. Our handwashing station rental and portable sink rental options satisfy that separately from toilet count. For general industry sites rather than construction, the ratio comes from 1910.141(c)(1)(i) instead of the construction table. Placement itself still needs to work with your site logistics: check the porta potty placement guide for setup distances that keep units stable and serviceable. A porta potty rental in Medford also has to account for delivery access, which typically runs about 60 feet of straight clearance if a roll-off or trailer is sharing the same lot.
Not automatically, but the moment you cluster portable toilets, ADA Standards section 213.2 requires at least 5 percent of the units to be accessible, with a minimum of one no matter how small the cluster. That single accessible unit needs a 36 inch clear route per ADA 403.5.1, a 32 inch door opening per ADA 404.2.3, and a 60 inch turning circle inside per ADA 304.3.1. Our ADA accessible porta potty units meet those clearances, and pricing runs inside the range shown below. Reach and grab-bar height matter too: ADA 308.2.1 caps a forward reach at 48 inches, and door hardware has to work under ADA 309.4, meaning no tight grasping or twisting to operate it. Full detail lives on the ADA restroom requirements page if you are staffing an event rather than a job site, since public-facing gatherings often draw stricter expectations than a private construction lot.
| unit | day | week | month |
|---|---|---|---|
| standard | 100-350 | 130-500 | 125-325 |
| ada | 200-400 | 120-240 | not offered |
| deluxe | 85-1200 | 150-290 | not offered |
Because OSHA treats them as two different obligations, not one bundled fixture. 29 CFR 1910.141(d)(2) requires washing facilities stocked with soap and towels or a hand-drying device; hand sanitizer alone does not satisfy it. That is why a hand sanitizer station rental is a nice add-on but never a substitute on a site that also needs OSHA-compliant washing. Pair it with real handwashing capacity and check the handwashing station requirements page for what actually counts. Sites with septic-fed facilities instead of portable units should also track pump intervals separately: a residential tank typically needs pumping every 3 to 5 years depending on size and household load, and a grease interceptor gets pumped once fats, oils, grease and solids reach 25 percent of liquid depth. Neither of those is an OSHA rule, but they keep a facility from failing inspection mid-project. If your Medford site runs a mobile office or storage container rental alongside the toilets, keep the wash station within a reasonable walk of both, matching the spirit of the 1928.110 quarter-mile standard even where it does not technically apply.
Two units, generally. OSHA 1926.51(c)(1) requires one toilet per 20 workers, so a 25-person crew has crossed that first threshold and needs a second facility plus a urinal per the 40-worker tier. Confirm with the porta potty calculator guide.
This page covers federal OSHA 1926.51(c), which applies on construction sites nationwide including Medford, and answers osha portable toilet requirements construction questions for this region. Cal OSHA portable toilet requirements and cal osha portable toilet requirements construction rules are their own state-specific standard, but that only applies to worksites in California, not Massachusetts, and a company handling portable toilet rental oshawa or other out-of-state jobs would need to check that region's own agency instead.
No. 29 CFR 1910.141(d)(2) specifically requires soap and towels or a hand-drying device. A hand sanitizer station rental is a fine supplement but does not replace a proper wash station on its own.
For 20 workers or fewer, OSHA 1926.51(c)(1) requires just one toilet facility. Most small renovation crews in Medford meet this with a single standard porta potty rental delivered for the job's duration.
OSHA's construction ratio applies to worksites with employees, not public events. Events instead follow local health guidance and crowd-based planning; see event restroom rental for how we size those separately from job site crews.
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