I have been researching for years... I have been dealing with this topic for over 15 years 😅 I am sending you a link here (it is a affiliate, because I'm so satisfied with this system). The founder of this company has been dealing with a water researcher for over 26 years!! He also took apart all the water filters known on the market in Europe, tested them and built his own thing...To get the best pur of it.
It's also not very expensive, compared to others for what it is, because he does not advertise... 
I get 0 to 4 ppm water put of the tab with this filter! This has been a total game changer for me 😍 Also the team from the small company is very helpful., always responding quickly if you have questions. They even do free drinking water analyses if desired and you can easily arrange a consultation appointment over the phone. 
My husband and I have been distilling water for 2 years so that we can drink reasonably healthy water. But the electricity costs and the effort involved were incredibly high. The water is also not alive after distillation like it is with the filter system. So I'm just happy with it...!

Sorry to bombard you with this long answer...but I'm just excited about it and grateful and love to share my enthusiasm 🤗😅❣️ I hope you find this helpful...

https://shop.misterwater.eu/?sPartner=Essencial

I also have a voucher code for 50.- Euro, in case you are interested. Just let me know and I would send it to you.