Public water systems sample for many different parameters every day to help ensure the safety of your drinking water. The data shown in the tables below helps the City make decisions about the best way to treat the water. If more than one sample is collected per day at a particular location, the average or range of all daily samples may be shown.

This table shows water quality data for the Genesee County water system. The City of Flint will use this data to make treatment decisions when Genesee County is supplying water to Flint.

This dataset was created and is maintained by the Office of the Clean Water Public Advocate, within the Michigan Department of Environment, Great Lakes, and Energy (EGLE).

For questions on this dataset, please contact EGLE-CleanWater@Michigan.gov

In April 2019, EGLE began monthly sampling of Public Water Supplies sampled during Phase I of the Statewide PFAS Sampling Survey which utilize surface water as a source. This sampling will be done for six months and will help determine if there are changes in PFAS levels for these 65 supplies over time, due to their use of surface water as a source.

In addition to PFAS testing for these 65 supplies, EGLE will collect and analyze samples for select cyanotoxins related to harmful algal blooms (HABs), to investigate whether these surface water sources are being affected. This testing program is being conducted by the EGLE Drinking Water and Environmental Health Division Community Water Supply Section. The results of this initiative will be provided by that group, once results become available.

Visit Michigan.gov/PFASresponse for more information.

For questions on this dataset, please contact EGLE-PFAS-DrinkingWater@Michigan.gov

This dataset shows testing results from the statewide sampling initiative for Michigan public water supplies conducted in 2018. Additional results from the testing will be added as they become available.

Visit Michigan.gov/PFASresponse for more information.

For questions on this dataset, please contact EGLE-PFAS-DrinkingWater@Michigan.gov

The next phase of statewide PFAS surveillance testing was slated to begin in May 2019 and run through October 2019. This effort sampled non-community public water supplies which were not part of Phase I, to assess the potential for PFAS impact in drinking water for expanded at-risk populations. Testing was conducted for non-community supplies utilizing their own well or wells.

In March 2019, the Michigan Department of Environment, Great Lakes, and Energy (EGLE) began quarterly sampling of Public Water Supplies sampled during Phase I which had Total Tested PFAS levels of at least 10 ppt but did not exceed the USEPA LHA (70 ppt PFOS+PFOA). This sampling will be done for one year (four quarters) and will help determine if there are seasonal changes in PFAS levels for these 61 supplies, to help prioritize and direct next steps.

Two systems which had Total Tested PFAS levels of at least 10 ppt but did not exceed the USEPA LHA (70 ppt PFOS+PFOA) use surface water as a source (Ann Arbor and Sims-Whitney Utilities Authority), and will be sampled as part of the Monthly PFAS Monitoring Program for Michigan’s Surface Water Supplies, including the Great Lakes.

Visit Michigan.gov/PFASresponse for more information.

For questions on this dataset, please contact EGLE-PFAS-DrinkingWater@Michigan.gov