Per- and polyfluoroalkyl substances (PFAS) have become a significant concern for communities nationwide, including Stillwater. These synthetic chemicals, found in various industrial and consumer products, are persistent in the environment and human body, leading to potential health risks.
Understanding PFAS
PFAS are used in products like non-stick cookware, water-repellent fabrics, and firefighting foams. Their resistance to heat, water, and oil makes them valuable in manufacturing but also contributes to their persistence in the environment.
Stillwater’s Water Supply
Stillwater’s drinking water is sourced from the Prairie Du Chien-Jordan and Jordan aquifers through eight wells, with depths ranging from 200 to 305 feet. The city delivers an average of 2.05 million gallons of water daily to approximately 20,600 residents. The water undergoes treatment with chlorine and fluoride to meet health standards.
PFAS Detection and Response
In 2022 and 2023, elevated PFAS levels were detected in some of Stillwater’s wells. In response, the city ceased using the affected wells and collaborated with the Minnesota Pollution Control Agency (MPCA) to investigate the contamination sources. The MPCA’s efforts include sampling private wells and conducting soil and water tests to identify potential PFAS sources.
Health Implications
Exposure to PFAS above health-based guidance values can lead to immune suppression, lower birth weights, increased risk of certain cancers, liver function changes, and thyroid issues. The Minnesota Department of Health (MDH) has established health-based values to evaluate risks from individual PFAS substances, ensuring the protection of vulnerable populations.
Community Involvement
Residents with private wells may be contacted for sampling as part of the MPCA’s investigation. Those with PFAS levels exceeding drinking water standards will be eligible for treatment provided by the MPCA. The city encourages residents to stay informed and participate in ensuring the safety of the community’s water supply.
Looking Ahead
Stillwater remains committed to providing safe drinking water. Ongoing investigations and collaborations with state agencies aim to address PFAS contamination effectively. Residents are encouraged to stay updated through official city communications and participate in community efforts to safeguard public health.