Industrial users of Ionia WWTP
Ionia, Michigan · 3 industrial users on record · 1 sampled for PFAS · 0 above 12 ng/L PFOS
In short
Ionia WWTP in Ionia treats 1.9 MGD and receives process wastewater from 3 industrial users on record in its pretreatment programme, led by automotive, metal and equipment manufacturing (2) and hospitals and public institutions (1). 1 are categorical users under federal pretreatment standards. 1 of them have been sampled for PFAS (53 samples, 2023–2024); none had a sample with PFOS above the 12 ng/L screening level.
PFAS sampling of the plant's industrial users
- Users sampled
- 1
- of 3 on record
- Above 12 ng/L PFOS
- 0
- 0 of 42 PFOS samples
- Highest PFOS sample
- 7.6 ng/L
- Ventra Ionia Main, Llc
- Latest sample
- Aug 2024
- 53 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 | Ventra Ionia Main, Llc · Ionia | Automotive, metal and equipment manufacturing | Categorical | 7.6 ng/LJan 2024 | 2.4 ng/LAug 2024 | 53 |
| 2 | Michigan Reformatory (DOC) · Ionia | Hospitals and public institutions | — | not sampled | — | — |
| 3 | Ventra Greenwich Holdings Corp · Ionia | Automotive, metal and equipment manufacturing | — | not sampled | — | — |
Unlock the details behind these 3 industrial users
For every industrial user of Ionia 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 Ionia 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 |
|---|---|
| Automotive, metal and equipment manufacturing | 2 |
| Hospitals and public institutions | 1 |
The largest groups, from each user's NAICS code.
Industrial users of Ionia 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 · Sludge dewatering · Biological nutrient removal · 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.