It really depends on what filter(s) that you are going to use - carbon filter, sediment filter (10, 5, 1 or 0.25 micron) This will affect your foot pump effort. I am not sure why you don't filter the water before entering your water tank. If you think that city water or even bottled water is not good enough for you to drink, why bother to introduce it into your tank.
Without knowing what is your concerns are regarding tap, city, or bottled water, it is hard to offer a viable solution to your need.
Without knowing what is your concerns are regarding tap, city, or bottled water, it is hard to offer a viable solution to your need.