Michigan Attorney General Dana Nessel filed a lawsuit Tuesday against three industrial manufacturers over perfluoroalkyl and polyfluoroalkyl substances, known as PFAS, detected in groundwater near Detroit’s primary water intake facility on the Detroit River.
The complaint names 3M Company, DuPont de Nemours Inc., and Chemours Company as defendants. The lawsuit seeks damages and remediation costs related to contamination discovered in the Ecorse area, approximately 12 miles south of Detroit’s Water Department intake structure.
“These forever chemicals pose a serious threat to our water supply and the health of Michigan residents,” Nessel said in a statement released Tuesday morning. “We will hold these corporations accountable for their negligence and demand they pay for cleanup efforts.”
Detection of PFAS compounds in the aquifer triggered emergency testing protocols at Detroit’s treatment facilities beginning in January 2026. Initial groundwater samples revealed PFAS concentrations ranging from 18 to 47 parts per trillion in monitoring wells located near industrial sites in the Ecorse and Lincoln Park corridor.
Background on PFAS Concerns
PFAS chemicals, used in numerous industrial and consumer products including non-stick coatings, food packaging, and fire-fighting foams, have drawn increased regulatory scrutiny nationwide. The Environmental Protection Agency established a maximum contaminant level of 4 parts per trillion for two specific PFAS compounds in 2024, with more stringent limits proposed for additional variants.
Georgia Dickerson, director of Detroit’s Water and Sewerage Department, told Detroit.co that water quality remained safe despite the discoveries. “Our treatment processes are removing PFAS compounds effectively,” Dickerson said. “However, we are concerned about the proximity of this contamination to our intake and support the Attorney General’s action.”
Detroit serves approximately 700,000 residents directly and supplies water to dozens of surrounding municipalities through wholesale arrangements. The metropolitan area depends almost entirely on the Detroit River for municipal water supply.
Industrial History in Ecorse
The Ecorse industrial corridor has been home to chemical manufacturing facilities since the 1940s. Multiple factories operated in the region producing coatings, lubricants, and other chemical products. Some facilities have closed in recent decades, while others continue limited operations.
Nessel’s lawsuit alleges that the manufacturers knew about PFAS persistence and toxicity as early as the 1970s but failed to disclose risks or implement containment measures at production facilities. The complaint references internal company documents showing awareness of PFAS bioaccumulation in wildlife near manufacturing sites.
“These corporations prioritized profits over public health,” the lawsuit states. “Their deliberate failure to disclose or mitigate PFAS releases has contaminated groundwater resources relied upon by millions of Michigan residents.”
Scope of Legal Action
The Attorney General’s office seeks recovery of all costs associated with PFAS detection, monitoring, and treatment modification. The complaint estimates preliminary remediation expenses at $8.2 million, though final costs could exceed $40 million depending on contamination extent.
Nessel also filed a parallel complaint with the Michigan Department of Environment, Great Lakes, and Energy requesting administrative action against specific facilities in the industrial corridor. State environmental officials announced Wednesday they would conduct expanded sampling to determine the full extent of groundwater contamination.
Two contaminated monitoring wells operated by the Water Department tested positive for PFAS in January and February 2026. A third well located 0.3 miles closer to the river tested negative, suggesting the contamination plume has not yet reached the intake structure.
“This is a critical finding,” said Dr. Robert Chen, environmental health professor at Wayne State University. “PFAS contamination near water intakes represents one of the most serious public health threats we face. Early detection and aggressive remediation are essential.”
Response from Defendants
Chemours Company released a statement denying responsibility for the detected contamination. “We have implemented comprehensive environmental management practices at our facilities and have taken voluntary measures to address PFAS concerns,” the company said. “We will defend vigorously against these allegations.”
3M Company did not immediately respond to requests for comment. DuPont declined to comment, stating the company does not discuss pending litigation.
Community Impact and Next Steps
The lawsuit comes as Michigan residents increasingly express concerns about water quality. A Detroit.co poll conducted in February found 63 percent of Detroit-area residents support government action against companies releasing PFAS chemicals.
State Senator Sylvia Santana, whose district includes affected communities, called the lawsuit overdue. “Our constituents deserve clean water,” Santana said. “I support the Attorney General’s aggressive approach and will work to strengthen Michigan’s PFAS regulations.”
The case has been assigned to Wayne County Circuit Court Judge Margaret Martinez. Oral arguments on preliminary motions are scheduled for April 2026. The defendants have 21 days to respond to the complaint.
