used a berkey go took from.puddle outside was fine did not even taste bad. I have used it many times before drinking from swamp water, beaver ponds, puddles, though we get a lot of rain here and if you really need a drink all you have to do is cut a sap drip and drink that. Best are in order for my taste birch(seasonal), alder, Aspen then pines stay away from cedar unless it’s old the bark gets into the Sap and is a pain in a$$ to get out. Pine taste shitty but has other properties it’s better to collect other sap and boil blue spruce needles to alleviate hunger and get some vitaming c… better yet to find some rose hips to add.
I have taken water from a seasonal spring run off that goes through a pig pen and cattle pasture so it definately has poop in it and drank a bit after filtering. It’s a mental cringe but the water is clean to drink. The filters however need to be back flushed and cleaned after so save some of the water.