OSHA requires 1 toilet for every 20 workers on a construction site, per 1926.51(c). Above 20 workers, the ratio shifts to 1 toilet seat and 1 urinal per 40 people, then per 50 once headcount hits 200. Ankeny contractors sizing a job site should start there.
Start with the crew size on your Ankeny job site, then apply 1926.51(c) directly: 1 facility per 20 workers or fewer, moving to 1 toilet seat and 1 urinal per 40 workers once you pass that threshold, and 1 per 50 at 200 workers or more. A 15-person framing crew needs one unit. A 45-person crew needs two toilet seats and one urinal, minimum. If your project sits closer to Johnston, about 10.2 miles southwest, or Altoona, 12.5 miles southeast, the same federal ratio applies, since OSHA does not vary by city. Our standard porta potty rental page has ground dimensions if you're mapping out layout. For a walkthrough with worked examples, see how many porta potties do I need. Don't forget potable water: 1926.51(a)(1) requires an adequate supply on site regardless of crew size, which usually means pairing your toilets with a handwashing station rental or a portable sink rental. None of this is Cal/OSHA territory here. Iowa contractors follow federal OSHA rules, not the California-specific portable toilet distance requirements some search results reference. If a subcontractor or GC based out of state asks about cal osha portable toilet requirements construction rules, tell them Iowa runs under the federal standard, full stop.
OSHA's own text does not specify a maximum distance from work area to toilet on construction sites; 1926.51(c) sets ratios, not travel distance. Agricultural field sanitation is different: 1928.110 requires toilets and potable water within a quarter mile walk of hand-labor employees. If your Ankeny operation blends row-crop labor with a construction crew, both standards can apply to different parts of the same property. See farm and agricultural restrooms for that overlap. Placement still matters for access and service. Trucks need roughly 60 feet of straight clearance behind them to service a unit, so keep a clear path from the street or lot entrance. Our porta potty placement guide covers ground stability, and OSHA 1926.56(a) sets minimum lighting levels for work areas if your units sit in a low-light zone during winter months. Check porta potty in winter for cold-weather servicing notes. If a unit needs to move mid-project, treat it like any other site element under 1926.25's housekeeping rule: keep the area clear of debris so the path stays usable.
OSHA's toilet ratio rules don't reference ADA directly, but ADA Standards 213.2 requires at least 5 percent of clustered single-user portable units to be accessible, with a minimum of one no matter how small the cluster. That means even a two-unit Ankeny job site should include one ADA unit if the site is open to the public or covered by ADA obligations separate from OSHA. Our ADA accessible porta potty page covers the specs: a 60 inch turning circle under 304.3.1, a 32 inch clear door opening under 404.2.3, and a 36 inch clear route under 403.5.1. Weekly ADA rental in Ankeny typically runs in the range shown below. Pair this with ADA restroom requirements for the full accessibility picture, especially for public-facing events like a county fair restrooms setup or a marathon and race restrooms course.
| unit | duration | typical price |
|---|---|---|
| ADA unit | day | $230 |
| ADA unit | week | $185 |
| Standard unit | day | $150 |
| Standard unit | week | $200 |
OSHA 1926.51(f)(1) requires washing facilities specifically where workers apply paints, coatings, herbicides or insecticides, or handle other harmful contaminants; it is not a blanket handwashing mandate for every job site. Separately, general industry workplaces (not construction) fall under 1910.141(c)(1)(i) for toilet ratios and 29 CFR 1910.141(d)(2) for washing facilities, which must include soap and towels or a hand-drying device. Hand sanitizer alone does not satisfy that rule. If your Ankeny crew is spraying finish coatings or handling pesticide-treated material, budget for a hand sanitizer station rental as a supplement, not a replacement, and see handwashing station requirements for the difference between the two rules. For sites juggling paint crews and general labor at once, a temporary power pole rental for lighting and pump equipment often gets requested alongside sanitation gear. Check temporary power pole if that applies to your Ankeny build-out.
ANSI/PSAI Z4.3 sets one service visit per week as the baseline for up to 10 users across a 40 hour week. High-traffic sites need more frequent pumping. See how often are porta potties cleaned for how that scales with headcount.
OSHA itself does not issue placement permits; that's a municipal question, and confirming placement in the public right of way needs a direct check with the City of Ankeny. See porta potty permit requirements before you set units near a street or sidewalk.
Under 1926.51(c), a 30-person crew exceeds the 20-worker single-unit threshold, so you need at least one toilet seat and one urinal, sized to the 40-worker ratio. Round up if your crew grows mid-project.
Yes. Many Ankeny contractors pair a storage container rental with their sanitation order to secure tools on the same site visit. A 20ft unit works for most crews; see 20ft storage container for sizing.
No. OSHA's ratio rules under 1926.51(c) don't specify unit type, only counts. A deluxe flushable porta potty is a comfort upgrade, not a compliance requirement, though some GCs request them for supervisory staff.
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