USEPA Approves the 2018 Addendum to the Statewide E. coli Total Maximum Daily Load (TMDL)

EGLE is announcing the U.S. Environmental Protection Agency (USEPA) approval of the 2018 Addendum to the Statewide E. coli TMDL. The Statewide E. coli TMDL was approved by the USEPA earlier this year and was designed to be expanded as new water quality data becomes available. The 2018 Addendum contains the justification and data summary for adding water bodies to the TMDL.

EGLE is committed to monitoring the quality of Michigan's surface waters and protecting public health from the pathogens associated with E. coli. As a result of new E. coli data obtained by EGLE and local partners, 4 beaches and about 2,700 miles of rivers were added to the TMDL.

EGLE's responses to public comments and the 2018 Addendum to the Statewide E. coli TMDL are available at Michigan.gov/EcoliTMDL. The E. coli Pollution and Solution interactive mapper has also been updated to reflect this approval.

Updates to the E. coli Pollution and Solution Mapper

Two layers in Michigan's E. coli Pollution and Solution Mapper have been updated in order to provide the most up-to-date information. The interactive mapper supports the Statewide E. coli  TMDL by providing access to E. coli monitoring results, locations of impaired waters, and information about the potential sources and solutions to bacterial pollution. The below updated information can be accessed in the Mapper tab and in the E. coli Monitoring, Point Source, and Nonpoint Source subject tabs:

• Riverine E. coli monitoring locations (and associated data summaries) have been updated to include 2019 EGLE monitoring (yellow star symbols). This layer now includes summaries for monitoring projects in the Rifle, Kalamazoo, Upper Clinton, Lower Grand, Big Sable, and Manistee Rivers.

• Approved TMDL watershed areas have been updated to include the newly approved 2018 Addendum to the Statewide E. coli TMDL.

Contact: Molly Rippke (517-342-4419)