Point Edward, ON – The Lambton Area Water Supply System (LAWSS) is undergoing maintenance on the fluoridation system. As a result, the optimization of fluoride levels in the water supply at LAWSS has been on pause since January 20, 2026. Completion of this maintenance is pending delivery of a replacement part. While optimizing fluoride levels in drinking water prevents tooth decay, this temporary pause does not affect the safety of the drinking water and there are no immediate health risks to the public.
LAWSS supplies water to customers in the City of Sarnia, Village of Point Edward, Township of St. Clair, Municipality of Lambton Shores, Town of Plympton-Wyoming, Township of Warwick, and Municipality of Brooke-Alvinston. The interruption to fluoridation means that residents who receive their water supply from LAWSS are not receiving optimal amounts of fluoride through their drinking water.
In accordance with the requirements of the Ontario Public Health Standards, Lambton Public Health reviews drinking water quality reports for all municipal drinking water supplies in which fluoride is added. Lambton Public Health is required to inform affected residents when fluoride concentrations in their water supply fall outside the therapeutic levels (0.6–0.8 ppm) for more than 90 consecutive days.
Repairs to the system are underway, and water fluoridation will resume once they are completed. Lambton Public Health will continue to monitor the situation and update the public when the fluoride concentration returns to optimal levels.
Affected residents can ensure that they continue to protect their dental health by brushing their teeth with fluoridated toothpaste. Residents at higher risk of tooth decay or who have any concerns about the impact of reduced fluoride levels on their oral health may wish to consult a dental health professional regarding additional preventive measures. The use of additional products containing fluoride must be recommended by a dental health professional after an assessment of individual oral health and risk for tooth decay.
Individuals from low-income households may qualify for free dental programs. For more information about these programs, please call 519-383-8331, ext. 3531.
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Please contact: LPH-media-inquiries@county-lambton.on.ca