DWSD Drinking Water Quality Numbers We are proud of the high quality and great taste of Detroit drinking water, and we want you to be proud and confident too. For detailed information about your drinking water quality, hardness, fluoridation and more, call our Water Quality Division: (313) 926-8128 For issues related to taste, odor or discolored water, call our Water Supply Operations: (313) 267-7401 back to Customer Service Numbers
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