Moving to a rental that has water delivery due to high PFAS levels. Looking to also get a filter but cannot install alter the sink to install. Any advice?

Hi all,

Title says it all. Looking to see what my options are for a rental unit that is currently on water delivery (which I am thankful for!) but would like to add a filter of my own either on the counter or under the sink or something so long as I don't do any permanent changes to the unit. I used to use Zero water filters but I don't see anyone mentioning those here...maybe they were kinda fake? Are there any on the counter reverse osmosis options? Also what about showering and laundry....is my stuff going to be insane contaminated?

Thanks!