Industrial users of Ki Sawyer WWTP-Marquette Co

3 industrial users on record discharge process wastewater to Ki Sawyer WWTP-Marquette Co in Gwinn, most of them in airports and military sites (1), automotive, metal and equipment manufacturing (1), chemicals, plastics and petroleum (1). 2 are categorical users, subject to federal pretreatment standards for their industry.

3 of the plant’s industrial users have been sampled for PFAS, 8 samples in 2023–2024. 1 had at least one sample with PFOS above the 12 ng/L screening level; the highest was 1,900 ng/L. The level is a surface water quality value, so a sample above it marks a source the plant has to follow up, not a violation by the company.

Under the Clean Water Act a treatment plant that receives industrial wastewater has to control it at the source: it permits its significant industrial users, sets local limits, inspects and samples them, and reports to the state each year. The aim is to stop pollutants that pass through or disrupt the plant, or end up in its biosolids.

This page names all 3 on record. What it leaves out, each user’s discharge flow, federal category, PFAS sampling history, source documents and contacts, is available with a free Klarifi account.