Public water systems in the Mid-Atlantic are being forced to ration a critical dental health chemical, leading to a noticeable drop in the levels of fluoride provided to millions of residents. The City of Baltimore and the WSSC Water utility, which serves the Maryland suburbs of Washington, D.C., have both reduced fluoride concentrations in their drinking water nearly in half.
This emerging fluoride shortage in US drinking water is the result of an unprecedented disruption in the global supply chain for hydrofluorosilicic acid. The chemical, essential for preventing tooth decay and cavities across municipal systems, is sourced from a modest pool of international producers. Recent geopolitical instability in the Middle East has severely constrained the availability of the acid, leaving water managers to stretch their remaining inventories.
Geopolitical Strains on Water Treatment
The shortage is primarily linked to production failures in Israel, one of the world’s leading producers of hydrofluorosilicic acid. According to Dan Hartnett, chief policy officer at the Association of Metropolitan Water Agencies, a major Israeli supplier experienced a significant loss of personnel after employees were called into active military service. This labor shortage essentially halted production and shipping from the facility.
Given that the United States does not manufacture this specialized acid domestically, municipal water systems rely entirely on imports. The chemical is transported in 5,000-gallon tanker trucks from importers to treatment plants. Matthew Garbark, director of the Baltimore City Department of Public Works, noted that the city was alerted by its supplier that deliveries would be reduced from three per month to two.
While previous global crises, such as the COVID-19 pandemic, caused logistical delays for various water treatment chemicals, officials say the current situation is different. Ben Thompson, director of production at WSSC Water, stated that during previous disruptions, utilities never reached a point where they had to actively reduce chemical usage to sustain operations.
The Scale of the Shortage and Local Impact
The impact is most visible in the reduction of fluoride concentrations. The Centers for Disease Control and Prevention (CDC) and the U.S. Public Health Service recommend a level of 0.7 milligrams per liter (mg/L) to optimize dental health. Both Baltimore and WSSC Water have lowered this to 0.4 mg/L.
This reduction affects millions of people. Baltimore’s system serves roughly 1.8 million customers, while WSSC Water serves 1.9 million residents in the Maryland suburbs of Washington, D.C. In Pennsylvania, the boroughs of Lititz and Hanover also reported shortages in March, though their issues were resolved within a few weeks.
| Water System | Population Served | Original Level | Reduced Level | Status |
|---|---|---|---|---|
| Baltimore City | 1.8 Million | 0.7 mg/L | 0.4 mg/L | Active Reduction |
| WSSC Water | 1.9 Million | 0.7 mg/L | 0.4 mg/L | Active Reduction |
| Lititz Borough | Local | 0.7 mg/L | N/A | Resolved |
| Hanover Borough | Local | 0.7 mg/L | N/A | Resolved |
Medical Perspectives on Fluoridation
As a physician, it is important to clarify the public health role of water fluoridation. Community water fluoridation is widely regarded as one of the most successful public health initiatives of the 20th century, estimated to reduce cavities by approximately 25%. By maintaining a low level of fluoride in the mouth, the process helps remineralize tooth enamel and prevent decay.
Despite the current shortage, water utilities emphasize that the drinking water remains safe. Fluoride is not a requirement for water safety under Environmental Protection Agency (EPA) regulations; rather, it is a health additive. The reduction in fluoride does not compromise the purity or quality of the water itself.
For those concerned about the dip in municipal levels, there are several alternative sources of fluoride available. These include:
- Fluoridated toothpastes and mouthwashes.
- Certain types of tea.
- Specific foods that naturally contain fluoride.
The medical community continues to support low levels of fluoride in drinking water as a safe and effective way to protect dental health across all socioeconomic groups, particularly for children who may not have regular access to dental care.
Looking Ahead
Water managers are currently attempting to “stretch” their supplies to avoid a total halt in fluoridation, particularly as water consumption typically increases during the summer months. WSSC Water and Baltimore City have indicated that these reductions are temporary and intend to return to the 0.7 mg/L recommendation as soon as the supply chain stabilizes.
However, a definitive timeline for the restoration of full fluoride levels remains unknown, as it depends entirely on the resolution of the conflict in the Middle East and the return of factory personnel in Israel.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Please consult a healthcare provider or dentist for personalized health recommendations.
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