PFAS Testing Results, Reportable Limits and Methods

Below are our PFAS testing results by testing method and the resulting levels.

City Initiated Testing- June 2018

EPA 537 (Approved method for drinking water analysis)

PFOS Non-detected

PFOA Non-detected

6:2 Fluorotelomer Sulfonates N/A

Compounds Tested 14 compounds

 

Lake Michigan (Isotope Dilution)

PFOS  1.40ppt

PFOA 1.09ppt

6:2 Fluorotelomer Sulfonates Non-detected

Compounds Tested 24 compounds

 

Drinking Water (Isotope Dilution)

PFOS  1.81ppt

PFOA 1.3ppt

6:2 Fluorotelomer Sulfonates 1.55ppt

Compounds Tested 24 compounds

 

State Testing

EPA 537 (Approved method for drinking water analysis)

PFOS Non-Detected

PFOA 2 ppt

6:2 Fluorotelomer Sulfonates Non-Detected

Compounds Tested 14 compounds

 

Lake Michigan (Istope Dilution)

PFOS Non-Detected

PFOA 2 ppt

6:2 Fluorotelomer Sulfonates Non-detected

Compounds Tested 24 compounds

 

Drinking Water (Isotope Dilution)

PFOS Non-Detected

PFOA  Non-Detected

6:2 Fluorotelomer Sulfonates 3 ppt

Compounds Tested 24 compounds

The reporting limit for MDEQ testing is 2ppt. This provides explanation as to why we have inconsistent detectable vs. non-detectable values in each test. One ppt is equal to 1 drop of water in 18 million gallons of water.