EPA Air · by county
Air-emissions sources in Clay County, South Dakota
- 7Facilities
Every stationary source in Clay County, South Dakota that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
By emissions classification in Clay County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
Inspections in Clay County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
- 2026 — inspections 4
- 2025 — inspections 3
- 2021 — inspections 3
- 2019 — inspections 3
- 2018 — inspections 3
- 2017 — inspections 3
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| BASIN ELECTRIC POWER COOPERATIVE SPIRIT MOUND STAT | Major source | No |
| CITY OF VERMILLION LANDFILL | Minor source | No |
| CLAY RURAL WATER SYSTEM INC. - WAKONDA | Synthetic minor source | No |
| MIDWEST READY MIX | Synthetic minor source | No |
| MISSOURI VALLEY ENERGY, LLC | Synthetic minor source | No |
| MISSOURI VALLEY ENERGY, LLC | Synthetic minor source | No |
| UNIVERSITY OF SOUTH DAKOTA | Major source | Yes |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.