Minnehaha County, SD
The federal environmental record for Minnehaha County (population 206,930): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
6
federal cleanup sites
1
PFAS-detecting water systems
25
TRI facilities
12
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Williams Pipe Line Co. Disposal Pit | Sioux Falls | deleted | 08/30/1990 |
Drinking water: PFAS testing
Public water systems serving Minnehaha with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| LINCOLN COUNTY RURAL WATER SYSTEM SD4600304 | PFBA: 6.1 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
25 facilities in Minnehaha filed TRI reports for 2024, totalling 1.3M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| SMITHFIELD PACKAGED MEATS CORP - SIOUX FALLS | SIOUX FALLS | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia | 1.1M lb |
| DESIGN TANKS LLC | SIOUX FALLS | Styrene | 62k lb |
| MASTERBRAND CABINETS LLC | SIOUX FALLS | Xylene (mixed isomers), Toluene | 59k lb |
| MARMEN ENERGY CO | BRANDON | Xylene (mixed isomers), n-Butyl alcohol | 27k lb |
| HENKEL OF AMERICA INC. | BRANDON | Xylene (mixed isomers) | 1k lb |
| CURT MANUFACTURING LLC | BRANDON | Chromium, Manganese | 634 lb |
| KNIFE RIVER-MADISON STREET | SIOUX FALLS | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Polycyclic aromatic compounds | 347 lb |
| CHS CORSON FEED | CORSON | Zinc compounds | 333 lb |
| DIAMOND MOWERS INC. | SIOUX FALLS | Manganese, Chromium | 102 lb |
| KNIFE RIVER-RICE STREET | SIOUX FALLS | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Polycyclic aromatic compounds | 80 lb |
| HANSEN MANUFACTURING DBA HI-ROLLER CONVEYORS | SIOUX FALLS | Manganese, Chromium | 22 lb |
| HANCOCK CONCRETE PRODUCTS | SIOUX FALLS | Lead compounds | 17 lb |
| GRACO INC SIOUX FALLS | SIOUX FALLS | Manganese, Copper | 16 lb |
| US DOD USAF JOE FOSS FIELD ANG SD | SIOUX FALLS | Toluene, Naphthalene | 14 lb |
| SAFETY-KLEEN SYSTEMS | SIOUX FALLS | Polycyclic aromatic compounds | 3 lb |
| ROSENBAUER SOUTH DAKOTA LLC | LYONS | - | 0 lb |
| VIAFLEX | SIOUX FALLS | - | 0 lb |
| DAKTRONICS INC | SIOUX FALLS | - | 0 lb |
| TCC - SIOUX FALLS | SIOUX FALLS | Lead | 0 lb |
| HOH WATER TECHNOLOGY INC | SIOUX FALLS | - | 0 lb |
| ALEX C. FERGUSSON LLC | BRANDON | - | 0 lb |
| ALLIED OIL & TIRE CO LLC | BRANDON | - | 0 lb |
| PURINA ANIMAL NUTRITION LLC - SIOUX FALLS SD | SIOUX FALLS | - | 0 lb |
| CEMCAST PIPE & PRECAST LLC | HARTFORD | - | 0 lb |
| ELECTRONIC SYSTEMS INC | SIOUX FALLS | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 396 tank facilities in Minnehaha: 439 tanks in service and 937 closed. 525 fuel releases are on record, of which 12 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Minnehaha 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 - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Minnehaha, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- BIG SIOUX RIVER WATERSHED SITESIOUX FALLS
- MAGELLAN PIPELINE CO, LP - SIOUX FALLS TERMINALSIOUX FALLS
- SIOUX FALLS VA MEDICAL CENTERSIOUX FALLS
- SOUTH DAKOTA AIR NATIONAL GUARDSIOUX FALLS
- TRI-STATE FIRESIOUX FALLS
- TRI-STATE REF. 'C' MINTSIOUX FALLS