Running or tap water must be reliable if it comes from a city water supply or a city well that provides water to many people. It is not necessary to filter it.
You should boil water from a private well or a small local well, even if you have a filter.
Many pool filters, refrigerator filters, filter jugs and filters that you can carry for camping trips do not eliminate microbes.
If you have a home system to filter water (such as a filter under the sink), replace the filter with the frequency recommended by the manufacturer.