Municipal Swmming Pool

I think it's mean that in some public swimming pools, the pool would be open to white people about 5 days a week and for black people, the pool would be open to them only about 1-2 days a week. I think this is mean because the white and black people should have equal days to swim in the pool. I can't believe that in some pools, the day before the pool was open only for black people, the white people would drain out the pool, and use liquid chlorine to scrub the whole pool. I can't believe this because the reason they did this was because they thought the black people were unclean and the chlorine would kill any bacteria. Also, the white and black people couldn't swim together.