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Water hardness is a measure of dissolved calcium and magnesium in water. If you buy a new dishwasher, you may need to find out the local water hardness before operating it.

The City doesn't provide information about water hardness at the property level, but you can get current information about hardness in City reservoirs by reading the New York City Drinking Water Supply and Quality Report.


Learn more about water quality.

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Call 311 for assistance.