The white residue commonly found in showers and kitchenware is the result of dissolved minerals, particularly calcium and magnesium.
SMWD imports a large portion of water from the Colorado River. As the water travels through rock canyons it picks up an appreciable amount of dissolved minerals, which is often referred to as “hard water”. These minerals do not pose a health risk, but may be a nuisance when they buildup on fixtures or hinder detergent performance.
Commercial products are available to remove white residue. SMWD recommends that you read the owner’s manuals for your dishwasher and washing machine for the manufacturer's recommendations regarding settings for mineral buildup or hard water.