Baltimore Reduces Fluoride in Drinking Water Due to Supply Shortage

City officials say water safety will not be affected by the temporary fluoride level decrease.

Apr. 13, 2026 at 4:10pm

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An extreme close-up X-ray photograph of a human tooth, revealing the intricate internal structure and highlighting the importance of fluoride for dental health.An X-ray view of a human tooth highlights the importance of fluoride for dental health, as Baltimore temporarily reduces fluoride levels in its drinking water due to a nationwide supply shortage.Baltimore Today

The Baltimore Department of Public Works announced that it will temporarily reduce fluoride levels in the city's drinking water due to a nationwide shortage of the chemical used for water fluoridation. Fluoride levels will decrease from 0.7 milligrams per liter to 0.4 milligrams per liter, but officials say the water will remain safe and the change is not expected to impact public health.

Why it matters

Water fluoridation is a common public health measure to help prevent tooth decay, but the practice has faced growing skepticism in some parts of the country. This shortage highlights the challenges cities can face in maintaining fluoride levels, even as health agencies continue to support the benefits of water fluoridation.

The details

The fluoride level reduction will affect customers served by Baltimore's water system, including parts of both Baltimore and Howard counties. The change is being driven by a combination of reduced domestic production, limited international supply, and ongoing global conflicts impacting the availability of hydrofluorosilicic acid, the chemical used in water fluoridation.

  • The fluoride level reduction will take effect immediately.

The players

Baltimore Department of Public Works

The city agency responsible for managing Baltimore's water system and infrastructure.

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What’s next

The city will continue to monitor the fluoride supply situation and adjust levels as needed. Residents are advised to consult with their dentists about any concerns regarding the temporary fluoride reduction.

The takeaway

This fluoride shortage highlights the challenges cities face in maintaining public health measures like water fluoridation, even as health agencies continue to support its benefits. The situation underscores the need for a reliable, sustainable supply of the chemicals required for water treatment.