Additional Monitoring Results Demonstrate Continued Effectiveness of Whole House Filters

In our ongoing commitment to provide residents confidence in their drinking water and share information with the community, we are providing the most recent monitoring results for whole house filters installed by Wolverine.

Wolverine summarized the first set of monitoring results in late January, which included results from over 280 homes.  That first group of results demonstrated that the whole house filters effectively reduce PFOA/PFOS to levels far below the EPA’s lifetime health advisory level of 70 ppt.

Wolverine is pleased to report that the latest results are consistent with the earlier results, and continue to demonstrate the effectiveness of the whole house filters.  Wolverine has now collected over 600 monitoring samples from over 500 homes over a period of more than five months.  Some of the highlights of the most recent test results:

  • Samples from homes with the highest concentrations of PFOA/PFOS (over 7,500 ppt) are taken weekly, and the results of the effluent (filtered) water continue to be less than 3 ppt for PFOA/PFOS.
  • Samples from homes with PFOA/PFOS concentrations of 1,000-7,499 ppt are taken monthly, and the results of the effluent (filtered) water continue to be less than 5 ppt for PFOA/PFOS.
  • Samples from homes with PFOA/PFOS concentrations of 71-1,000 ppt are taken quarterly, and the results continue to range from non-detect to less than 8 ppt for PFOA/PFOS.  These results were taken between the two carbon canisters, and the water continues through the second carbon canister of the system for further reduction.
  • Homes with PFOA/PFOS concentrations at or lower than 70 ppt continue to be monitored, and for these homes the water between the two carbon canisters has remained well below 70 ppt for PFOA/PFOS.

To date, Wolverine has paid for the installation, testing, and maintenance of more than 500 whole house filters and 150 point-of-use filters, and additional installations are taking place every week.  Wolverine has also paid for sampling of over 1,500 residential wells, provided bottled water to over 1,200 homes, and installed over 70 monitoring wells.

In late November, Wolverine provided details about the operation and maintenance of the Culligan/Calgon whole house filter systems that Wolverine selected, which have been used to treat water for PFAS in over 1,500 homes around the country and have been demonstrated to effectively remove PFOA, PFOS, and other PFAS, ensuring that these compounds are not returned to the environment.  These filters include at least two granular activated carbon canisters and two sediment filters.  The frequency for carbon canister replacement will be determined based on post-installation testing results, and Culligan will remove and dispose of these canisters when they are replaced.  The sediment filters will be changed by Culligan every four months, and homeowners can place the used filters in their garbage.  Homeowners will be notified by Culligan when either the carbon canisters or sediment filters need to be replaced.

Additional information about this filtration system and a diagram depicting the different filters can be found here.  We will continue to keep the community updated about monitoring results and filter maintenance through our blog at  Any residents with questions are encouraged to contact us directly at (616) 866-5627 of

Wolverine Worldwide Releases Test Results From Former Tannery Site, Rogue River & Rum Creek

No Drinking Water at Risk; Experts Say No Health Risk From Swimming or Recreational Contact

Wolverine Worldwide today announced results of the water sampled for testing from its former Tannery site in Rockford. This testing was done to further evaluate the groundwater and surface water – the sources of water sampled at these sites, including the Rogue River and Rum Creek, are not used for drinking water.  The Company has worked closely with the Michigan Department of Environmental Quality (MDEQ) on this testing, and has already submitted a proposal to the MDEQ outlining next steps to further evaluate the Tannery site.

To read the full press release, click the link below.

Wolverine Worldwide Releases Test Results From Former Tannery Site, Rouge River & Rum Creek

Rogue River Map

Water Test Results Update (Week of November 6)

To maintain transparency and communication with our community, we will be publishing water test results as they become available. We will update the community as more results are received.

  • 292 homeowner well test results have been received to date
  • 270 homeowner well tests have come back below the EPA lifetime drinking water advisory level (70 parts per trillion)
  • 22 homeowner wells have tested above the EPA lifetime drinking water advisory level (70 parts per trillion)

We are still waiting for test results for several wells in the Buffer Zone as well as all of those in the Southeast Expansion Area.

The EPA established a health advisory level for drinking water at 70 parts per trillion for PFOA/PFOS. This advisory level was set for the most sensitive populations including children and pregnant mothers and is based on consuming 2 liters a day for 70 years.

Any residents with questions are encouraged to contact us directly at 616.866.5627 or

Safe Water Results for East Rockford Middle School

We are happy to announce safe water results from wells tested at East Rockford Middle School and a property along Ramsdell Drive. In partnership with the MDEQ, the wells were tested for presence of PFAS (including PFOA and PFOS). While we were waiting for the results, Wolverine supplied bottled water to East Rockford Middle School out of an abundance of caution.

Additionally, recent tests on the Rockford and Plainfield municipal water systems also confirmed safe water for residents.

Results have been shared with the Michigan Department of Environmental Quality (MDEQ), Kent County Health Department (KCHD), Michigan Department of Health and Human Services (MDHHS), Cannon Township, and Dr. Michael Shibler, superintendent of Rockford Public Schools.

Wolverine remains dedicated to transparency and proactively testing sites identified by the MDEQ so residents will have confidence in their water. Wolverine continues to collaborate with local and state agencies on this issue, and fully supports the current course of action.

Click the link below for the full press release.
Wolverine Worldwide Announces Safe Water Results For East Rockford Middle School.