Hemlock Semiconductor Operations LLC
12334 Geddes Rd., P.o. Box 80, Hemlock, MI 48626, Saginaw County
A manufacturing facility in Hemlock, Michigan, listed in EPA records under ground or treated mineral and earth manufacturing (NAICS 327992) and also industrial gas manufacturing and other basic inorganic chemical manufacturing. It is one of 6,071 active manufacturing facilities in EPA records in Michigan.
- Industry
- Glass, cement and stone
- NAICS 327
- TRI reporter
- Yes
- Inspections, 5 yr
- 10
- EPA registry ID
- 110000407783
- Revised
- November 1, 2026
What's made here
- Ground or Treated Mineral and Earth Manufacturing (NAICS 327992)
- Industrial Gas Manufacturing (NAICS 325120)
- Other Basic Inorganic Chemical Manufacturing (NAICS 325180)
- Nonferrous Metal (except Aluminum) Smelting and Refining (NAICS 331410)
Public EPA records
| Toxics Release Inventory | Reports to the TRI (facility ID 48626HMLCK12334). |
|---|---|
| Clean Air Act | Listed as a major source of air emissions. |
| Clean Water Act | A non-major water discharge permit (NPDES). |
| Hazardous waste (RCRA) | Listed as a large quantity generator of hazardous waste (1,000 kg or more a month). |
| Greenhouse gas reporting | Reports to the Greenhouse Gas Reporting Program. |
| Inspections | 10 in the last five years; most recent June 18, 2026. |
EPA ECHO, November 1, 2026; not a rating. EPA report ยท About these records