tested the blue camco filter with a TDS meter

I use the Camco filter, not to make campground spigot water drinkable but to remove small debri particles from what goes into my camper. I'm more concerned about a rust flake from plumbing from a old campground plumbing system that may have been built 50+ years ago getting into a check valve or my water pump and causing a problem.

I haul my own drinking water for week long trips and use a pitcher filter for longer ones.