[Retric]

It can take a lot to filter water safely. The classic carbon filter under the sink does very little to improve safety, even reverse osmosis can fall short. So, while you can make things safer it's far more difficult than many assume.

[andai]

Sounds like the best option is to buy bottled water, and then filter out the microplastics.

[AstralStorm]

Most problems with plastics are chemical not physical contamination. (It is a solution of plasticizers and substrates in water.)

I am pretty sure ingesting plastic sand would be nowhere newer bad without these. (Intestine shouldn't take that in.)

These are extra hard to filter out. Even big fermentation tanks and reverse osmosis filters have problems with this.

[haZard_OS]

There is also the danger of microplastic particles acting as endocrine disruptors. This is a rapidly developing field within (eco)toxicology and is of growing concern among environmental scientists.

https://pubs.acs.org/doi/10.1021/acs.est.6b01441

https://www.sciencedirect.com/science/article/pii/S026974911...

https://www.sciencedirect.com/science/article/pii/S004896971...

[beenBoutIT]

Reverse osmosis should do the trick.