Chlorine taste, a sulfur smell, cloudy or gritty water, and specific well contaminants each call for a different kind of filtration, whether that is a whole-home carbon filter, a reverse osmosis unit at the kitchen sink, or a sediment prefilter ahead of the water heater.
Between servicing, keep an eye on filter housings for cracks or slow drips, and note whenever water pressure drops or taste changes, since either usually means a filter is due for a change.
A persistent taste or smell that a filter change does not fix, or a household test showing a contaminant above safe levels, are reasons to call rather than keep swapping cartridges. Smart Pro Plumbers connects Bell Gardens, CA homes with a plumber who tests water and installs whole-home, reverse osmosis, and point-of-use filtration matched to what the test shows. Call (844) 898-0295 to get matched with someone local.