Winneshiek County, IA
The federal environmental record for Winneshiek County (population 19,815): 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
1
PFAS-detecting water systems
5
TRI facilities
6
open tank releases
Drinking water: PFAS testing
Public water systems serving Winneshiek 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 |
|---|---|---|
| DECORAH WATER DEPARTMENT IA9630012 | PFBS: 7 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
5 facilities in Winneshiek filed TRI reports for 2024, totalling 7k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| INFASTECH-DECORAH LLC | DECORAH | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Copper | 6k lb |
| GEMINI-DECORAH | DECORAH | Copper | 250 lb |
| ROCKWELL COLLINS - DECORAH OPERATIONS | DECORAH | Lead | 5 lb |
| DECO PRODUCTS CO | DECORAH | Copper | 0 lb |
| IOWA ROTOCAST PLASTICS INC | DECORAH | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 122 tank facilities in Winneshiek: 55 tanks in service and 279 closed. 46 fuel releases are on record, of which 6 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Winneshiek 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