Hexachlorocyclopentadiene
CAS # 77-47-4
657 lbs total reported releases across all facilities and years.
Facilities listed below reported releases of this chemical to the EPA Toxic Release Inventory (TRI). Quantities are self-reported annual totals in pounds, broken out by release pathway. Click any facility name for its full compliance profile.
National Release Trend (2015–2024)
-95% overall
| Year | Total Released (lbs) | Reporting Facilities | vs Prior Year |
|---|---|---|---|
| 2015 | 325 | 8 | — |
| 2016 | 230 | 8 | -29% |
| 2017 | 15 | 6 | -94% |
| 2018 | 14 | 5 | -7% |
| 2019 | 1 | 2 | -90% |
| 2020 | 11 | 5 | +751% |
| 2021 | 12 | 6 | +4% |
| 2022 | 16 | 7 | +38% |
| 2023 | 16 | 6 | +2% |
| 2024 | 17 | 5 | +3% |
Top Releasing Industries
| Industry Sector | Total Released (lbs) | Facilities |
|---|---|---|
| Manufacturing | 657 | 7 |
| Administrative and Support and Waste Management | 0 | 2 |
Worst Water Discharge Exceedances
Facilities that exceeded their permit limits for this chemical in discharge monitoring reports
| Facility | Location | Year | Total (lbs) | Air | Water |
|---|---|---|---|---|---|
| HEIDELBERG MATERIALS CEMENT COMPANY LLC | LOGANSPORT, IN | 2015 | — | — | — |
| BLUE CUBE OPERATIONS LLC | PLAQUEMINE, LA | 2015 | — | — | — |
| WESTLAKE US 2 LLC | WESTLAKE, LA | 2015 | — | — | — |
| THE DOW CHEMICAL COMPANY - LOUISIANA OPERATIONS | PLAQUEMINE, LA | 2015 | — | — | — |
| OCCIDENTAL CHEMICAL CORP. | NIAGARA FALLS, NY | 2015 | 307 | 307 | 0 |
| METTON AMERICA LA PORTE PLANT | LA PORTE, TX | 2015 | 15 | 10 | 5 |
| DDP SPECIALTY ELECTRONIC MATERIALS US 5, LLC (0868090072) | WEST ALEXANDRIA, OH | 2015 | 3 | 3 | — |
| HERITAGE THERMAL SERVICES | EAST LIVERPOOL, OH | 2015 | 0 | 0 | 0 |