October 4, 2018: Weekly Update on Kalamazoo County Water Quality
County weekly PFAS update
The Michigan Department of Environmental Quality (MDEQ), in partnership with State and local health officials, Richland Township, the Gull Lake Sewer and Water Authority, and the City of Kalamazoo, has completed sampling and received results from 62 residential water wells near the former Production Plated Plastics Site. Residents that have had a water sample collected from their private drinking water well have either been offered a filter or an alternate water source, depending on the results of their water sample. The sampling results are summarized in the following table:
Number of Wells Sampled:
62 (as of 8/20/18)
62 (as of 8/30/18)
# of Results Non-Detect
# of Results between Non-Detect and Standard of 70 parts per trillion (PFOA + PFOS)*
# of Results above Standard of 70 parts per trillion (PFOA + PFOS)
*NOTE: 70 ppt of combined PFOA/PFOS is the EPA’s Lifetime Health Advisory Level
The sampling results for PFOA + PFOS, the two PFAS for which the EPA has issued a Lifetime Health Advisory, are also summarized in the above table. These data indicate that the current extent of residential drinking water wells impacted above 70 ppt has been defined. Additional PFAS were also included in the testing and may be present in drinking water wells. At this time, the EPA has not established health-based criteria for these other PFAS and it is not clear what, if any, health effects may be caused by some of these other PFAS.
The next step to assuring that Richland Township’s water is protected is a Remedial Investigation (RI) to determine the nature and extent of PFAS contamination in the groundwater. The RI will include the installation and sampling of monitoring wells along the boundary of the current study area, as shown on the below figure. Work associated with the RI is anticipated to start in late October or early November.
The complete report may be read here