Industrial users of North Kent Sa WWTP
Grand Rapids, Michigan · 5 industrial users on record · 4 sampled for PFAS · 3 above 12 ng/L PFOS
In short
North Kent Sa WWTP in Grand Rapids treats 3.74 MGD and receives process wastewater from 5 industrial users on record in its pretreatment programme, led by landfills and waste management (2) and automotive, metal and equipment manufacturing (1). 2 are categorical users under federal pretreatment standards. 4 of them have been sampled for PFAS (48 samples, 2018–2024); 3 had a sample with PFOS above the 12 ng/L screening level.
PFAS sampling of the plant's industrial users
- Users sampled
- 4
- of 5 on record
- Above 12 ng/L PFOS
- 3
- 34 of 47 PFOS samples
- Highest PFOS sample
- 642 ng/L
- North Kent Landfill
- Latest sample
- May 2024
- 48 samples in all
12 ng/L is Michigan’s surface water quality value for PFOS and the screening criterion of the initiative; 170 ng/L is the value for PFOA since July 2022. Both apply to what a treatment plant discharges to a river or lake, not to what a factory sends to the sewer. An industrial user above the level has not broken a limit: it is a source the receiving plant has to follow up with sampling, a reduction plan or pretreatment.
Industrial users on record
| # | Industrial user | Industry | Type | Highest PFOS | Latest PFOS | Samples |
|---|---|---|---|---|---|---|
| 1 | North Kent Landfill · Rockford | Landfills and waste management | Significant | 642 ng/L54× · Oct 2020 | 5.6 ng/LMay 2024 | 23 |
| 2 | EPA Superfund Site: State Disposal Landfill, Inc. · Grand Rapids | Landfills and waste management | Significant | 386 ng/L32× · Oct 2018 | 64 ng/LMay 2024 | 22 |
| 3 | Valley City Sign · Comstock Park | Automotive, metal and equipment manufacturing | Categorical | 58.8 ng/L4.9× · May 2018 | 10.3 ng/LSep 2018 | 2 |
| 4 | Magnum Powder Coating · Comstock Park | Metal finishing and plating | Categorical | not detected | — | 1 |
| 5 | Plainfield Charter Township Water Dept. 5 · Grand Rapids | Other industries | — | not sampled | — | — |
Unlock the details behind these 5 industrial users
For every industrial user of North Kent Sa WWTP: discharge flow, federal category, full PFAS sampling history, source documents and contacts. Free with a Klarifi account.
Or let Klarifi Plus run the outreach for you →Industrial users discharging to North Kent Sa WWTP, ordered by their highest PFOS sample. Source: PFAS sampling reports that treatment plants file with EGLE under the IPP PFAS Initiative (MiEnviro Portal), extracted by Klarifi.
Industrial users by industry
| Industry | Industrial users |
|---|---|
| Landfills and waste management | 2 |
| Automotive, metal and equipment manufacturing | 1 |
| Metal finishing and plating | 1 |
| Other industries | 1 |
The largest groups, from each user's NAICS code.
Industrial users of North Kent Sa WWTP: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: Significant industrial user · Biosolids · POTW · NPDES permit · MGD · Lift station · all terms
Industrial users: PFAS sampling reports that treatment plants file with EGLE under the IPP PFAS Initiative (MiEnviro Portal), extracted by Klarifi. Values are as reported by the receiving plant; a value shared by several compounds in one sample is read as the laboratory’s reporting limit and not counted as a detection. Spotted an error? Tell us and we correct it.