I draw from the lake. I put this system in several years ago.
https://www.filtersfast.com/P-Pura-1...5d78025dba40c9
Two weeks after installing it I had the water tested and they said it was "drinking quality water".
I left the Lowe's small filter in front of the new system. My thought is that it catches the majority of what is coming through before it gets to the Pura system. I watch the Lowe's filter and change it every couple of weeks. I change the other filters and the UV light once a year in the spring.