Follow package instructions for the bleach. Rusty water is caused by iron. The iron may come from the water supply, from a water heater or from rusty metal parts in a well. Iron bacteria may also cause the problem. Iron can be dissolved in the water or suspended as particles.
Chlorine reacts with dissolved iron to form particles of iron that settle out of the water.
If the particles form in the washer during chlorine bleaching, they will deposit in the fabric and cannot be removed. Solution Replacing a rusty water heater may solve the problem. Dissolved iron may also be removed by water softening equipment, special iron-removing equipment or filters, chlorination and filtration through sand and carbon, or aeration followed by filtration through sand. Chlorination and filtration also remove iron bacteria. To remove rust stains from white and colorfast washable fabrics, use a rust remover such as Rover.