It is important to stop the introduction of these chemicals and microplastics into our environment. That should be the number one goal - to stop it at it's source instead of dealing with it after the fact. Depending on how the filtration systems scale, not everyone would be able to benefit - and certainly not wildlife which is affected.
In the meantime, it may be effective to remove these chemicals from your body through regular blood and plasma donation[0]. Although not entirely altruistic, I doubt those in need of emergency blood are asking if it contains PFASs. In the end it helps you and those in need.
I have also recently switched to stainless steel cookware and picked up a LifeStraw home water filter[1] that claims to reduce these chemicals in your drinking water.
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8994130/ [1] https://lifestraw.com/products/lifestraw-home