Statewide Sampling Initiative for Public Water Supplies (Phase I - 2018)

The table below shows testing results from the statewide sampling initiative for Michigan public water supplies.  Additional results from the  testing will be added as they become available.

Understanding the Sample Results

Results are provided in parts per trillion (ppt). One ppt is the equivalent of 1 drop of water in 20 Olympic-size swimming pools.One part per trillion equals one drop in 20 swimming pools

Definitions of the information provided in the sampling results tables:

  • Population Served: The number of individuals served by the water supply.
  • Sample Date: The date samples were taken at the water supply.
  • Sample Number: The identification number that corresponds to the sample taken.
  • Raw Water or Treated Drinking Water: The location where the water sample was collected. If the table shows “Raw Water” the sample was taken directly from the well or water source. If the table shows “Treated Drinking Water” the sample was taken after the water passed through treatment system(s) the water supply has in place.
  • PFOA + PFOS (ppt): The amount of PFOA and PFOS added together.
    • If the results listed is “ND” the lab did not detect, or find, that PFAS was in the water sample.
  • Total Tested PFAS (ppt): The amount of all PFAS chemicals that were tested added together.
    • If the results listed is “ND” the lab did not detect, or find, that PFAS was in the water sample.
  • Method: The laboratory method used for analyzing the samples. For more information, please visit the Frequently Asked PFAS Questions Page.

For support in communicating results to your customers, please visit our Toolkit for documents to assist in your outreach.

Data

The Public Water Supplies dataset is available for download on the data.Michigan.gov open data portal.