Nez Perce County, ID
The federal environmental record for Nez Perce County (population 42,987): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
2
federal cleanup sites
1
PFAS-detecting water systems
12
TRI facilities
4
open tank releases
Drinking water: PFAS testing
Public water systems serving Nez Perce 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 |
|---|---|---|
| LEWISTON CITY OF ID2350014 | PFBS: 5.6 ng/L PFPeA: 4.7 ng/L PFHxA: 4.3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
12 facilities in Nez Perce filed TRI reports for 2024, totalling 1.5M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| CLEARWATER PAPER CORP-PPD & CPD IDAHO | LEWISTON | Methanol, Ammonia | 898k lb |
| FEDERAL CARTRIDGE CO-CCI | LEWISTON | Copper And Copper Compounds, Lead | 297k lb |
| FEDERAL CARTRIDGE CO-SOUTHPORT | LEWISTON | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead And Lead Compounds | 136k lb |
| P KAY METAL LEWISTON | LEWISTON | Lead compounds, Copper And Copper Compounds | 94k lb |
| IDAHO FOREST GROUP-LEWISTON | LEWISTON | Methanol, Lead And Lead Compounds | 49k lb |
| COLEMAN OIL CO | LEWISTON | Toluene, Xylene (mixed isomers) | 1k lb |
| FREEDOM MUNITIONS LLC | LEWISTON | Lead, Copper | 750 lb |
| FREEDOM MUNITIONS LLC | LEWISTON | Cyanide compounds, Antimony | 536 lb |
| FEDERAL CARTRIDGE CO-SPEER | LEWISTON | Lead, Copper | 375 lb |
| POE ASPHALT PAVING INC. | LEWISTON | Polycyclic aromatic compounds | 25 lb |
| SCHWEITZER ENGINEERING LABS INC-LEWISTON ID FACILITY | LEWISTON | Lead, Copper | 2 lb |
| POE ASPHALT PAVING INC | LEWISTON | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 195 tank facilities in Nez Perce: 99 tanks in service and 394 closed. 35 fuel releases are on record, of which 4 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Nez Perce as Zone 3, the lowest predicted indoor radon (under 2 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 Nez Perce, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- LEWISTON MERCURY SPILLLEWISTON
- POTLATCH CORPORATIONLEWISTON