Milton Fire Chief Robert Edgar said the procedure involve firefighters flowing the water from the hydrants until it runs clean.
The fire chief added crews will try to push the water out in an effort so no households will be affected.
Unfortunately, for homes in cul-de-sac, the situation is unavoidable and could produce a temporary discoloration of water from faucets, showers, washing machine or dishwashers, Edgar added.
If this happens, residents should call the city at 678-242-2570.
The department's fire hydrant maintenance initiative will last until mid-April.
The agency wants to stress to residents that the appearance of sediment is not due to an issue with the Fulton County Water & Sewer Division, but is a natural occurrence in the lines.