GLWA has issued a boil water advisory for 23 communities, 10 elevators

Map of communities affected by water main break (photo: Great Lakes Water Authority)

An estimated 935,000 people were affected by a water main break at the Great Lakes Water Authority’s Lake Huron facility.

GLWA is working to isolate a break on the 120-inch water main; the largest in the regional water distribution network. The leak was discovered early Saturday morning.

The location of the leak was found approximately one mile west of GLWA’s Lake Huron water treatment facility. Crews are working to isolate the area so repairs can begin.

Update: GLWA reduces boil water advisory to 13 communities after water main break

Emergency connections to other networks in the system will be opened once the leak is isolated, GLWA said.

A precautionary boil water advisory has been issued for the following affected communities:

  • The village of Almant
  • City of Auburn Hills
  • Township of Bruce
  • Township of Burtchville
  • Township of Chesterfield
  • Clinton Township
  • flint city
  • Township of Flint
  • City of Imlay
  • City of Lapeer
  • Township of Lenox
  • Township of Macomb
  • Township of Mayfield
  • New Haven Village
  • Township of Orion
  • City of Pontiac
  • City of Rochester
  • City of Rochester Hills
  • Township of Shelby
  • City of Sterling Heights
  • City of Troy
  • City of Utica
  • Washington Township

As of 3:30 p.m. Saturday, the following communities were removed from the boil water advisory: Clinton Township, Flint, Flint Township, Rochester Hills, Pontiac, Auburn Hills, Orion Township, Utica, Troy, Sterling Heights and Lapeer.

“Based on further review of GLWA water pressure data, it does not appear that the water pressure in these communities has fallen below the 20 psi threshold for declaring a water advisory. ‘water boiling,’ GLWA said in a statement.

The town of Romeo has been added to the precautionary boil water advisory, according to GLWA.

Residents under the boil water advisory should not drink water without boiling it for at least one minute and then allowing it to cool, the GLWA said. Boiled, bottled or disinfected water should be used for drinking, making ice, washing dishes, brushing teeth and preparing food until further notice, according to the advisory.

“Whenever a water system loses pressure for a significant duration, precautionary measures are recommended as a loss of pressure can lead to bacterial contamination in the water system,” GLWA said. “Bacteria are generally not harmful and are common throughout our environment. Boiling water before using it will kill bacteria and other organisms that may be in the water.”

The cause of the water main break is still under investigation.

Updates will be provided as information becomes available.

For more information, contact Great Lakes Water Authority Water Quality at or by calling (313) 926-8192 or (313) 926-8128. General guidelines on ways to reduce the risk of infection from microbes are available from the EPA’s Drinking Water Hotline at 1 (800) 426-4791.

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