Hamilton County, IN
The federal environmental record for Hamilton County (population 371,645): 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
13
TRI facilities
21
open tank releases
Drinking water: PFAS testing
Public water systems serving Hamilton 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 |
|---|---|---|
| INDIANA AMERICAN WATER - NOBLESVILLE IN5229015 | PFPeA: 3.3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
13 facilities in Hamilton filed TRI reports for 2024, totalling 86k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| KING SYSTEMS CORP | NOBLESVILLE | Dichloromethane, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 60k lb |
| INDUSTRIAL DIELECTRICS INC. DBA IDI COMPOSITES INTERNATIONA | NOBLESVILLE | Styrene, Zinc compounds | 12k lb |
| INDUSTRIAL DIELECTRICS INC. | NOBLESVILLE | Styrene, Zinc compounds | 11k lb |
| COUNTRYMARK REFINING & LOGISTICS LLC | WESTFIELD | n-Hexane, Toluene | 2k lb |
| INDIANA MILLS & MANUFACTURING INC. | WESTFIELD | Manganese | 279 lb |
| ID CASTINGS LLC | NOBLESVILLE | Lead | 25 lb |
| HELMER SCIENTIFIC TRANE TECHNOLOGIES | NOBLESVILLE | Chromium, Manganese | 23 lb |
| EMC PRECISION II | SHERIDAN | Lead | 2 lb |
| CHEMSTATION OF INDIANA | CARMEL | - | 0 lb |
| VALVOLINE GLOBAL PRODUCTS | NOBLESVILLE | - | 0 lb |
| WEAS ENGINEERING | WESTFIELD | - | 0 lb |
| SMC CORP OF AMERICA | NOBLESVILLE | - | 0 lb |
| OLDCASTLE LAWN & GARDEN | NOBLESVILLE | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 288 tank facilities in Hamilton: 285 tanks in service and 604 closed. 162 fuel releases are on record, of which 21 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Hamilton 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 Hamilton, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- FIRESTONE INDUSTRIAL PRODUCTS CO.NOBLESVILLE
- U-LOK-ITCARMEL