Are there any consumer devices that are capable of filtering out any amount of micro or nano plastics? I already avoid plastic bottles as much as I reasonably can, and I'd like to make sure my tap water is as not terrible as possible.
https://kishucharcoal.com/shop/brita-reuseable-filter-501/
As the sibling says, reverse osmosis is the best.
RO membranes are tight enough and should effectively remove all microplastics from the output water. On a consumer RO system the water will still pass through a few final treatment stages and a few feet of plastic tubing before getting to your glass.
Very possible some additional plastic is being introduced in the post membrane stages and delivery but my assumption is that a point of use RO system is going to reasonably effective.
There is some chance the manufacturers are omitting the fact that all membranes are bleeding microplastics during use. At the moment I don't think we have enough evidence to say they are and most testing has shown them to be effective as a removal method.
https://apnews.com/article/plastic-nano-bottled-drinking-wat...
Other devices you can install with some rudimentary plumbing knowledge are BWT or Pentaire reverse osmosis filters. They do a good enough job at filtering, though they waste a lot of water in the process. I use these at work and I the Pentaire allows you to control ppm, which is suitable for coffee aficionados. You can always remineralize your water once you get the junk out.
ZeroWater uses an ion exchange filter - It's my understanding that many (most?) micro plastics are not dissolved and/or are not charged meaning it won't effectively filter most microplastics.
Similarly they aren't designed to filter bacteria.
> The current system is meant to be used with municipally treated, potable water as the current filter will not remove microbiological contaminants.