Olmsted County, MN
The federal environmental record for Olmsted County (population 164,784): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
3
federal cleanup sites
1
PFAS-detecting water systems
8
TRI facilities
11
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Olmsted County Sanitary Landfill | Oronoco | deleted | 06/10/1986 |
Drinking water: PFAS testing
Public water systems serving Olmsted 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 |
|---|---|---|
| Rochester, MN MN1550010 | PFHxS: 3.9 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
8 facilities in Olmsted filed TRI reports for 2024, totalling 186k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| GEOTEK LLC (G2) | STEWARTVILLE | Styrene, Diisocyanates | 81k lb |
| KERRY INGREDIENTS & FLAVOURS INC. | ROCHESTER | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 45k lb |
| GEOTEK LLC | STEWARTVILLE | Styrene, Diisocyanates | 40k lb |
| EMCOR ENCLOSURES | ROCHESTER | Manganese | 20k lb |
| CRENLO ENGINEERED CABS LLC - PLANT 2 | ROCHESTER | Manganese, Chromium | 106 lb |
| CRENLO ENGINEERED CABS LLC - PLANT 1 | ROCHESTER | Manganese, Nickel | 18 lb |
| KEMPS LLC - ROCHESTER | ROCHESTER | Peracetic acid | 0 lb |
| BENCHMARK | ROCHESTER | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 314 tank facilities in Olmsted: 227 tanks in service and 797 closed. 258 fuel releases are on record, of which 11 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Olmsted 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 Olmsted, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- 1201 SOUTH BROADWAYROCHESTER
- MAYO CLINICROCHESTER TOWNSHIP
- OLMSTED COUNTY SANITARY LANDFILLORONOCO