The Regional Municipality of Wood Buffalo (RMWB) has issued a 'Do Not Consume' water advisory for infants, children up to 13 years old, and pregnant women in Fort McKay, Alberta, following heavy rainfall that led to elevated manganese levels in the drinking water.
Cause of the Advisory
The advisory was triggered after high levels of manganese were detected in Fort McKay's drinking water. The source of the contamination is the Ells River, which is used for the town's water treatment process. Heavy precipitation deposited large amounts of sediments carrying manganese into the river. The Calgary Herald reported up to 100 mm of rainfall in southern Alberta as of June 29, with areas like Kananaskis Country and Canmore declaring a state of local emergency due to flood risk.
Health Risks and Affected Populations
Manganese is a naturally occurring nutrient found in air, food, water, soil, and rocks. It can enter drinking water through natural dissolution or human activities such as mining, industrial emissions, and landfill leaching. While small amounts are essential for health, excessive manganese can be harmful, especially for vulnerable groups. According to Health Canada, too much manganese in drinking water, even for short periods, can cause deficits in memory, attention, and motor skills, as well as neurological and behavioral defects in infants and young children. The advisory applies to infants, children up to 13, and pregnant women, but not to older children or adults.
Response and Mitigation Measures
Officials are working around the clock to adjust water treatment processes to filter out elevated organic material. Water from the Fort McMurray Water Treatment Plant is being transported to dilute manganese levels in the Fort McKay system. The RMWB is providing free bottled water to all affected residents and Fort McKay First Nation members. A pickup station is set up at the zamboni doors on the northeast side of the Fort McKay arena, open daily from 10 a.m. to 6 p.m. Residents can collect one case of bottled water per person every three days. Additionally, 60 cases of water will be delivered to the Fort McKay Band Office for distribution to members.
Current Status
The advisory remains in effect until further notice as water testing and monitoring continue. No advisory has been issued for Fort McMurray. Residents are advised to check the Health Canada website for updates. The RMWB urges affected individuals to avoid consuming tap water for drinking, preparing infant formula, or cooking until the advisory is lifted.
