EPA-regulated facilities in Union County, SD
There are 150 EPA-regulated facilities inside Union County, South Dakota. The most common kinds are water discharge (93), hazardous waste (38), drinking water systems (13). None is in significant noncompliance, but 1 have a violation on record.
By category
| Category | Facilities |
|---|---|
| Hazardous waste | 38 |
| Small quantity generators | 20 |
| Chemical (RMP/TRI) | 8 |
| Air emissions | 9 |
| Synthetic minor sources | 2 |
| Minor sources | 3 |
| Water discharge | 93 |
| Minor permits | 74 |
| Drinking water systems | 13 |
A facility enrolled in several programs counts once in the total and once in each of its categories.
Bordering counties
- Clay County
- Dakota County, NE
- Dixon County, NE
- Lincoln County
- Plymouth County, IA
- Sioux County, IA
- Woodbury County, IA
Reading these numbers
These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.