OHS bathroom standards relate to equipment and facilities, e.g., how many toilets there must be, rather than sanitation or cleanliness. One of the best places to go for actual housekeeping and cleaning staff guidance are the standards developed by different industries, notably healthcare, hotels and restaurants, specifically the parts on bathrooms. Govt. housekeeping manuals are also pretty helpful. Here are some sourcesto check out:

https://www.publichealthontario.ca/fr/eRepository/Best_Practices_Environmental_Cleaning_2012.pdf
https://www.publichealthontario.ca/fr/eRepository/Best_Practices_Environmental_Cleaning_2012.pdf
https://www.toronto.ca/wp-content/uploads/2017/11/91d0-ssha-housekeeping-manual.pdf
https://www.issa.com/certification-standards/issa-clean-standards.html

https://www.ccohs.ca/oshanswers/hsprograms/cleaning_staff.html
https://www.gvsu.edu/cms4/asset/35B7E1BB-E143-1FD3-469091825E1035BC/gvsu_green_housekeeping_standard_5-30-14.pdf

Hope that helps. Glenn

There are regulatory requirements on physical aspects like how near the toilets need to be, how many there must be at different sites, etc. But I don’t know of anything about cleanliness, other than general requirements that stuff be clean. If you tell me what specifically you’re looking for, I may be able to track something down.