I quit using the charcoal and high end ones just for that reason. Use the string types to get rid of sediment since we have a gravel filter at home to do the same for our well water. I check the filter every few weeks while we're traveling, but usually only have to replace them once or twice a season.
In all the years of traveling & camping, we've only come across a few CGs that had noticeably bad tasting water and we just used bottled for drinking & coffee then.
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