DeKalb County, IL
The federal environmental record for DeKalb County (population 100,288): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
3
federal cleanup sites
1
PFAS-detecting water systems
16
TRI facilities
55
open tank releases
Drinking water: PFAS testing
Public water systems serving DeKalb 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 |
|---|---|---|
| GENOA IL0370150 | PFPeA: 5.2 ng/L PFHxA: 3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
16 facilities in DeKalb filed TRI reports for 2024, totalling 87k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| SEYMOUR OF SYCAMORE LLC | SYCAMORE | Toluene, Xylene (mixed isomers) | 50k lb |
| CST INDUSTRIES INC. | DEKALB | Manganese, Nickel | 21k lb |
| NATURAL POLYMERS LLC | CORTLAND | Nonylphenol Ethoxylates, Diisocyanates | 10k lb |
| UNIFIED WIRE & CABLE INC. | DEKALB | Copper | 6k lb |
| FORGE GROUP DEKALB LLC DBA DEKALB FORGE CO | DEKALB | Chromium, Manganese | 10 lb |
| NEHRING ELECTRICAL WORKS CO | DE KALB | Copper | 6 lb |
| DRIV-LOK INC. | SYCAMORE | Chromium, Lead | 4 lb |
| DURO CAST INC | SOMONAUK | Lead | 1 lb |
| CRAFCO INC. - DEKALB | DEKALB | - | 0 lb |
| J6 POLYMERS | GENOA | - | 0 lb |
| IDEAL INDUSTRIES INC. | SYCAMORE | - | 0 lb |
| EUCLID CHEMICAL CO | KIRKLAND | - | 0 lb |
| OZINGA READY MIX CONCRETE INC. - SYCAMORE | SYCAMORE | Lead | 0 lb |
| IDEAL INDUSTRIES INC | SYCAMORE | - | 0 lb |
| ELGILOY SPECIALTY METALS | SYCAMORE | - | 0 lb |
| OZINGA READY-MIX-DEKALB | DEKALB | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 273 tank facilities in DeKalb: 164 tanks in service and 585 closed. 204 fuel releases are on record, of which 55 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps DeKalb 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 DeKalb, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- HARVESTER SQUARE SITESYCAMORE
- SEYMOUR OF SYCAMORESYCAMORE
- WALCAMP OUTDOOR MINISTRIES MERCURYKINGSTON