Industrial users of City Of Port Huron Wastewater Treatment Plant
Port Huron, Michigan · 6 industrial users on record · 4 sampled for PFAS · 3 above 12 ng/L PFOS
In short
City Of Port Huron Wastewater Treatment Plant in Port Huron treats 6.03 MGD and receives process wastewater from 6 industrial users on record in its pretreatment programme, led by metal finishing and plating (3) and automotive, metal and equipment manufacturing (1). 3 are categorical users under federal pretreatment standards. 4 of them have been sampled for PFAS (23 samples, 2023–2024); 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 6 on record
- Above 12 ng/L PFOS
- 3
- 20 of 23 PFOS samples
- Highest PFOS sample
- 2,900 ng/L
- Auto Anodics
- Latest sample
- May 2024
- 23 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.
5 of 6 industrial users
| # | Industrial user | Industry | Type | Highest PFOS | Latest PFOS | Samples |
|---|---|---|---|---|---|---|
| 1 | Auto Anodics · Port Huron | Metal finishing and plating | Categorical | 2,900 ng/L242× · Apr 2024 | 1,400 ng/LMay 2024 | 8 |
| 2 | St. Clair County Landfill · Smiths Creek | Landfills and waste management | Significant | 510 ng/L43× · Feb 2023 | 170 ng/LApr 2024 | 13 |
| 3 | Michigan Metal Coatings · Port Huron | Metal finishing and plating | Categorical | 370 ng/L31× · Aug 2023 | 370 ng/LAug 2023 | 1 |
| 4 | Dunn Paper, Inc. · Port Huron | Paper and packaging | — | not sampled | — | — |
| 5 | Michigan Metal Coatings · Port Huron | Metal finishing and plating | Categorical | not detected | not detectedAug 2023 | 1 |
Unlock 1 more industrial users of this plant
For every industrial user of City Of Port Huron Wastewater Treatment Plant: 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 City Of Port Huron Wastewater Treatment Plant, ordered by their highest PFOS sample; the first 5 of 6. 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 |
|---|---|
| Metal finishing and plating | 3 |
| Automotive, metal and equipment manufacturing | 1 |
| Landfills and waste management | 1 |
| Paper and packaging | 1 |
The largest groups, from each user's NAICS code.
Industrial users of City Of Port Huron Wastewater Treatment Plant: 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 September 18, 2026.
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.