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Mayor's Office

City of Flint December 10, 2021 Update: Secondary Water Pipeline

FLINT, MI — The Department of Public Works began facilitating 95/5 water increment combining/blending to the Genesee County Drain Commission (GCDC) secondary water pipeline on Monday, August 23, 2021. The process of combining the primary and secondary water sources was required to complete necessary repair work to the City’s primary water pipeline.

Phase IV of the City’s incremental water blend to 75 percent for the secondary GCDC secondary water pipeline, and 25 percent to the Great Lakes Water Authority (GLWA) primary water pipeline began on Tuesday, October 26, 2021.


• Supply chain issues have impacted the delivery of components required for the chemical feed building. As a result, the timeline to implement Phase V (incremental water increases to 100 percent for combining/blending to the GCDC secondary water pipeline) has been delayed.

• Until components are delivered, the City, in consultation with the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the U.S. Environmental Protection Agency (EPA), has made the decision to return to Phase III (50 percent to the GCDC secondary water pipeline and 50 percent to the GLWA primary water pipeline) on Monday, December 13, 2021.

• The amended Phase V timeline will also delay infrastructure upgrades to Control Station-2. Upgrades to CS2 are expected to resume early January, 2022.

• As the city awaits delivery of chemical feed building components, additional technical modifications will be made to the infrastructure to better ensure operational reliability and training will be reinforced among chemical feed building staff. 

All protocols are in adherence with the State of Michigan Safe Drinking Water Act, and the City’s agreement with its primary water supplier, GLWA, will continue to be followed.

Important reminders for residents:

• For the latest updates on the progress of Flint’s water infrastructure projects, visit

• Water monitoring will continue as all major infrastructure projects are completed. Monitoring results are available on the EGLE’s website at

• For water emergencies or issues with water service call (810) 766-7202 [water] and (810) 766-7079 [sewer]. These lines are monitored 24/7.

• For non-emergency questions or concerns, email [email protected]. This email is monitored by DPW department staff.

• Mayor Neeley will continue to provide weekly community updates on WFLT 1420 AM and via Facebook on Saturdays.

The City of Flint will continue to provide residents with updates on water infrastructure projects as information becomes available.

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