Construction Porta Potty Rental in Ontario, CA
Construction porta potty rental in Ontario, California puts toilets on the job site for as long as the work runs, sized to the crew under OSHA 29 CFR 1926.51. Call (888) 417-6737, answered 24/7, and we connect you with a provider that serves the site. About 14.3% of local housing units were built in 2010 or later (ACS 2020–2024), above the U.S. 11.4%.
Updated 2026-10-13

Conditions at a Glance
Climate figures: NOAA 1991–2020 normals from the Riverside Muni Ap, CA station, about 11 miles away.
Conditions for Job Sites
New Housing
About 14.3% of Ontario's housing units were built in 2010 or later (ACS 2020–2024), above the U.S. share of 11.4% and higher than three in four U.S. places in our data: newer construction sits alongside older stock, so job sites range from new homes to additions and repairs. About 4.5% were built in 2020 or later, in the top tenth of U.S. places in our data.
Homes From the 1970s and 1980s
The median year built for Ontario's housing is 1980 (ACS 2020–2024), newer than most U.S. places in our data. Housing from that era is now 35 to 55 years old; crews replacing roofs, windows or mechanical systems on it need a toilet on site like any other crew.
Housing Mix
The most common housing type is detached houses, about 58% of units (lower than most U.S. places in our data), followed by buildings with five or more units at about 20% (ACS 2020–2024). Detached houses usually have a driveway or yard where a crew's unit can stand within reach of the service truck. Apartment and condo projects bring larger crews, and a property manager decides where units go. About 42% of occupied homes are rented (owner share lower than most U.S. places in our data), so check who controls the property before a unit goes on it.
DOE's Building America map puts San Bernardino County in the Hot-Dry climate region (IECC 2021 zone 3B, PNNL county guide). This region combines hot summers with low humidity: sun, dust and water supply are the usual planning issues, more than rain.
Heat
About 101 days a year reach 90°F or more, more than three in four U.S. places in our data, so heat is the normal condition for months at a time. About 22 days a year go past 100°F. On sunny, dry sites, place units in shade where the site allows. For long summer shifts, ask for a summer service frequency, and place units near shade and the crew's drinking water, not out on bare, sun-baked ground.
Lead-Safe Renovation
About 50% of housing units predate 1980 (ACS 2020–2024). Under OSHA’s lead standard (29 CFR 1926.62), workers exposed to lead need adequate hand-washing facilities, and EPA’s RRP Rule covers paint-disturbing work in homes built before 1978; add hand-wash stations to the order on those jobs.
How Many Toilets
OSHA 29 CFR 1926.51(c)(1) sets the minimum number of toilets on a construction site by headcount:
| Number of employees | Minimum toilet facilities |
|---|---|
| 20 or fewer | 1 toilet |
| 20 or more | 1 toilet seat and 1 urinal per 40 workers |
| 200 or more | 1 toilet seat and 1 urinal per 50 workers |
Worked examples, rounding up as the table is usually read: 15 workers need 1 toilet. 45 workers need 2 toilet seats and 2 urinals (45 ÷ 40 = 1.125, rounded up to 2). 210 workers need 5 seats and 5 urinals (210 ÷ 50 = 4.2, rounded up to 5).
Servicing frequency is set with the provider when you book; tell us headcount and shift length. OSHA's job-site toilet table has the full table.
Placement and Access
Put units on firm, level ground the service truck can reach, close to where crews work, clear of crane swing, excavation and vehicle routes, and move them as the work moves.
Dry, Windy Sites
Only about 9 inches of precipitation falls in an average year, in the driest tenth of U.S. places in our data. Stake units on open lots or set them against a structure, and keep them away from dust thrown up by grading.
Federal OSHA or State Plan
California runs an OSHA-approved State Plan, Cal/OSHA (Division of Occupational Safety and Health), California Department of Industrial Relations, that covers most private-sector workers as well as state and local government workers (osha.gov State Plans, accessed 2026-10-13). State Plans must be at least as effective as federal OSHA, so check the State Plan's construction sanitation rule alongside 29 CFR 1926.51. osha.gov lists some coverage exclusions for this plan; the State Plan page shows which work they affect.
Who to Ask About Local Rules
Ontario is an incorporated city with its own municipal government. For a unit placed in the street, on a sidewalk or in another public right-of-way next to the job site, ask the Ontario city government before you book what applies.
What to Ask For
- Crew size at the busiest point and shift length (OSHA sets the minimum by headcount)
- Rental term and service frequency
- A spot on site the service truck can reach
- Whether units need to move as the work progresses
- Summer service frequency
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Construction Porta Potty Rental in Ontario: Questions
How do I book job-site porta potties in Ontario?
Call (888) 417-6737, answered 24/7, with the site address, dates and headcount. We connect you with a provider that serves Ontario, and the provider confirms units, price, delivery, servicing and pickup. Tell us the units you want; the provider confirms what's available for your site.
How many toilets for a 45-person crew?
2 toilet seats and 2 urinals: 45 ÷ 40 is 1.125, rounded up to 2, which is the usual reading of OSHA's 1926.51 table. For comparison, 15 workers need 1 toilet and 210 workers need 5 seats and 5 urinals.
Does California use federal OSHA or a State Plan?
California runs an OSHA-approved State Plan, Cal/OSHA (Division of Occupational Safety and Health), California Department of Industrial Relations, that covers most private-sector workers as well as state and local government workers (osha.gov State Plans, accessed 2026-10-13). State Plans must be at least as effective as federal OSHA, so check the State Plan's construction sanitation rule alongside 29 CFR 1926.51. osha.gov lists some coverage exclusions for this plan; the State Plan page shows which work they affect.

Don't know where to start?
Call now and tell us about your event or job site. We will help you work out the units you need and connect you with a provider that serves your location.
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