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Baltimore Lowers Fluoride in Drinking Water to 0.4 mg/L Citing Supply Shortfall

A shortage of hydrofluorosilicic acid threatens cavity protection for vulnerable residents.

Overview

  • Baltimore’s Department of Public Works, which announced the change Monday, lowered dosing at the Ashburton and Montebello plants to 0.4 mg/L from 0.7 mg/L.
  • Officials said the water remains safe to drink and noted the system serves Baltimore City plus parts of Baltimore and Howard counties.
  • DPW attributed the cut to a national shortage of hydrofluorosilicic acid as a key Israeli supplier faces war-related disruptions and U.S. production has declined.
  • Parents of young children and others at higher risk were urged to consult dentists about alternative fluoride sources such as topical treatments during the shortfall.
  • The move follows WSSC’s April 7 reduction and comes as health groups recommend about 0.5 to 1 mg/L for effective prevention with no federal minimum required.