Canyon County, ID
The federal environmental record for Canyon County (population 257,674): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
4
federal cleanup sites
0
PFAS-detecting water systems
22
TRI facilities
14
open tank releases
Drinking water: PFAS testing
No public water system serving Canyon 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)
22 facilities in Canyon filed TRI reports for 2024, totalling 1.2M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| AMALGAMATED SUGAR CO NAMPA | NAMPA | Ammonia, Methanol | 806k lb |
| SIMPLOT U.S. FOOD GROUP HOLDINGS LLC | CALDWELL | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ammonia | 246k lb |
| BEST BATH SYSTEMS | CALDWELL | Styrene, Methyl methacrylate | 157k lb |
| DARIGOLD-CALDWELL | CALDWELL | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 6k lb |
| ICCO MIDDELTON | CALDWELL | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead | 2k lb |
| SIMPLOT WESTERN STOCKMEN'S | CALDWELL | Copper And Copper Compounds, Manganese And Manganese Compounds | 688 lb |
| PERFORMIX NUTRITION SYSTEMS LLC | NAMPA | Zinc compounds, Manganese compounds | 312 lb |
| 301931-STEPHENS #2 (NAMPA) | NAMPA | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead And Lead Compounds | 90 lb |
| OLDCASTLE INFRASTRUCTURE & IDAHO SAND & GRAVEL | NAMPA | Polycyclic aromatic compounds, Lead compounds | 57 lb |
| BIG TEX TRAILER MANUFACTURING INC-CALDWELL | CALDWELL | Manganese, Chromium | 50 lb |
| IDAHO ASPHALT SUPPLY INC NAMPA PLANT | NAMPA | Polycyclic aromatic compounds, Lead | 34 lb |
| PLEXUS MANUFACTURING SOLUTIONS (BOI) | NAMPA | Lead And Lead Compounds | 17 lb |
| DZ GRINDERS LLC | CALDWELL | Manganese, Chromium | 12 lb |
| HART & COOLEY | NAMPA | Chromium, Nickel | 7 lb |
| OLDCASTLE NAMPA MADISON | NAMPA | Lead compounds, Mercury compounds | 1 lb |
| MADDENS READY MIX | CALDWELL | Lead | 0 lb |
| FLEETWOOD HOMES OF IDAHO INC #04-1 | NAMPA | - | 0 lb |
| OLDCASTLE LAWN & GARDEN INC | NAMPA | - | 0 lb |
| FORTERRA STRUCTURAL SPECIALTY PRODUCTS - CALDWELL | CALDWELL | Lead | 0 lb |
| DUBOIS CHEMICALS INC. - NAMPA ID | NAMPA | - | 0 lb |
| SUNROC CORP - NOTUS HOT MIX ASPHALT PLANT | CALDWELL | Polycyclic aromatic compounds | 0 lb |
| LIPPERT COMPONENTS INC.- PLANT 84 | NAMPA | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 333 tank facilities in Canyon: 242 tanks in service and 729 closed. 152 fuel releases are on record, of which 14 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Canyon as Zone 2, moderate predicted indoor radon (2 to 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 Canyon, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- NAMPA RESIDENTIAL LEAD SITENAMPA
- US DOI BLM DRY LAKE AIRSTRIPNAMPA
- USDOI BLM CENTRAL COVE LANDFILLCALDWELL
- USDOI BLM PICKLES BUTTE AIRSTRIPNAMPA