The level of hardness depends on the mix of groundwater and imported water and varies throughout the year. On average, MWD water is harder than our local groundwater. The effects of hard water are obvious throughout your household, particularly in the kitchen.
Hard water can cause white deposits or spots on glassware, dishes and silverware.
The Water Department has prepared this web page to better inform you on the causes and prevention of these unsightly spots. The higher the concentration of these minerals, the harder your water. When present, these minerals react with soap and reduce suds. Water with a low concentration of calcium and magnesium is called soft water. Water hardness can vary across the City depending on the mix of local groundwater and imported water.