What is the white residue that builds up on silverware, glasses and even my shower door?

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.

Show All Answers

1. What is SMWD doing to ensure that your water is safe?
2. What is a Public Health Goal (PHG)?
3. How is drinking water quality regulated?
4. What are trihalomethanes (THM) and haloacetic acids (HAA)?
5. How can I perform my own water testing?
6. Is SMWD water hard or soft?
7. What is the white residue that builds up on silverware, glasses and even my shower door?
8. Why does my tap water sometimes look cloudy?
9. Does SMWD water have PFAS in it?
10. What is the odor that I sometimes smell from my tap or sink faucet?