Slightly Off White How Do I Bleach White Clothes When I Have Slightly Rusty Water?

How do i bleach white clothes when i have slightly rusty water? - slightly off white

my white shirts white again broken, because water is a little rusty, but today I want to know. Can someone do me PACKING?
Even if I wear white clothes to wash in the washing machine must make every effort to be white? as if no letters on t-shirts will bleed my other clothes?
pleaaaase help me!
thanksss