Minnesota's plan for spending the $850 million settlement with 3M for polluting east metro groundwater with manmade "forever chemicals" focuses on a core concern: trust in the water that comes out of the spigot.
The final plan released Wednesday was years in the making and details the spending for 14 communities with drinking water contaminated by per- and polyfluoroalkyl substances, known as PFAS.
The huge plume of contaminated groundwater covers 150 square miles and affects more than 170,000 people in Washington County. The toxic nonstick chemicals pioneered by Maplewood-based 3M Co. are linked to a range of health problems such as liver damage, kidney and testicular cancer and thyroid disruption, and don't break down in the environment.
About $700 million from the settlement, plus interest, will pay for large and small projects to get PFAS out of the drinking water in Washington County. Minnesota Pollution Control Agency (MPCA) Commissioner Peter Tester said the projects will "ensure a safe and sustainable drinking water supply well into the future."
Tester noted that the plan developed through a public process involving scores of meetings and input from hundreds of residents, local and state officials, community leaders and 3M itself.
"This plan being announced today is infinitely better because of their feedback, ideas and willingness to come together as a region," Tester said.
The drinking water plan will finance six new or expanded drinking water treatment plants, drill at least four new public wells, treat more than two dozen existing wells, connect 296 homes to municipal water supplies and install filtration systems for nearly 1,000 homeowners with contaminated private wells.
Not all drinking water with detectable amounts of PFAS will get treated. Only water with PFAS levels that meet or exceed a health index of 0.5 will trigger treatment. That level is half the state's safety threshold for multiple PFAS. How protective a trigger point to use was one of many disagreements during the public process.