I noticed that if I collect water from a stream dense of small debris/thin mud, if I keep the water bottle close to the surface, while it takes a longer time to fill the bottle, the water is cleaner there.
In that occasion, the water was not that muddy, but it was muddy enough not to look clear - it had a very light brownish colour - and to taste "groundy" as well, despite my care in collecting it on the top of the small stream (which made a difference).
I boiled it; for quite some time (one good minute of hard boiling), so I assume it was very safe from a bacteriological point of view.
I am wondering though: there may be any health dangers caused by drinking all that tiny debris?
And, unhealthy or safe, it still tasted bad. Are there any - possibly simple and lightweight - ways to filter that? Like, may a coffee filter help? Or, what could/should be used, assuming that the water contains no dangerous chemicals and that the biological dangers are removed by boiling?
Please notice that this is not a generic question about water purification but it's very specific to debris and to lightweight backpacking.