Wilmington DE Department of Public Works
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Frequently Asked Questions

Below you will find information that might help you understand how to find things or learn about information you might need to know about your city or town.

Fluoride

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  • Fluoride is a natural mineral that can get into water from natural sources or from being added during the treatment process. In the City's water, there's already a little fluoride from nature. But during the water treatment, more fluoride is added. This is to help keep teeth strong and prevent certain health problems. Adding fluoride is also required by the State of Delaware Office of Drinking Water.

    Fluoride
  • In Delaware, there's a Maximum Contaminant Level (MCL) for fluoride, set at 2.0 parts per million (ppm). MCLs tell us about certain things in the water that might affect how it tastes, smells, looks, or feels. If the average fluoride levels in the water go over Delaware's MCL, the City has to tell customers. Read more from the Office of Drinking Water here.

    Fluoride
  1. Wilmington Water Utility home page

Contact Us

  1. Department of Public Works

  2. Louis L. Redding City/County Building

  3. 800 N. French Street, 6th Floor

  4. Wilmington, Delaware 19801

Hours

  1. Monday through Friday

  2. 8:30 am to 4:30 pm


  3. Dial 311 within city limits

  4. or 302-576-2620 from outside city limits

After Hours

  1. Phone: Wilmington 311 or call 302-576-2620 (outside City limits)
    After hours call 302-654-5151

  2. Email: Water (General) or Water Quality Lab

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