Union County, SD
The federal environmental record for Union County (population 17,183): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
0
PFAS-detecting water systems
3
TRI facilities
1
open tank releases
Drinking water: PFAS testing
No public water system serving Union reported a PFAS detection in the UCMR5 national testing round. Systems serving under 3,300 people were only sampled in part, so absence from this table is not proof of absence in the water.
Facilities reporting toxic releases (2024)
3 facilities in Union filed TRI reports for 2024, totalling 243 lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| ROYAL CANIN USA INC. | NORTH SIOUX CITY | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 243 lb |
| LOAD KING TRAILERS | ELK POINT | - | 0 lb |
| CONSUMERS SUPPLY - NORTH SIOUX | NORTH SIOUX CITY | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 58 tank facilities in Union: 49 tanks in service and 139 closed. 74 fuel releases are on record, of which 1 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Union as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39