♦ Carcinogen
Heptachlor
CAS # 76-44-8
117,848 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)
-91% overall
| Year | Total Released (lbs) | Reporting Facilities | vs Prior Year |
|---|---|---|---|
| 2015 | 32,658 | 13 | — |
| 2016 | 29,651 | 12 | -9% |
| 2017 | 22,929 | 12 | -23% |
| 2018 | 28,266 | 14 | +23% |
| 2019 | 27 | 5 | -100% |
| 2020 | 131 | 14 | +378% |
| 2021 | 327 | 15 | +149% |
| 2022 | 372 | 16 | +14% |
| 2023 | 526 | 15 | +41% |
| 2024 | 2,960 | 19 | +463% |
Top Releasing Industries
| Industry Sector | Total Released (lbs) | Facilities |
|---|---|---|
| Wholesale Trade | 0 | 1 |
| Administrative and Support and Waste Management | 117,848 | 23 |
Worst Water Discharge Exceedances
Facilities that exceeded their permit limits for this chemical in discharge monitoring reports
| Facility | Reported | Limit | Exceedance | Period |
|---|---|---|---|---|
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +476,090% | Nov 2023 |
|
FALLBROOK PUD WWTP NO.1
FALLBROOK, CA
|
0.04 kg/d | 0.00 | +242,400% | Jan 2025 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +237,995% | Nov 2023 |
|
FALLBROOK PUD WWTP NO.1
FALLBROOK, CA
|
0.03 kg/d | 0.00 | +72,055% | Dec 2025 |
|
FALLBROOK PUD WWTP NO.1
FALLBROOK, CA
|
0.03 kg/d | 0.00 | +67,571% | Mar 2025 |
|
JEFFERSON DAVIS PARISH SANITARY LANDFILL COMMISSION
WELSH, LA
|
0.00 mg/L | 0.00 | +64,900% | Sep 2025 |
|
JEFFERSON DAVIS PARISH SANITARY LANDFILL COMMISSION
WELSH, LA
|
0.00 mg/L | 0.00 | +64,900% | Jun 2025 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +47,519% | Sep 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +47,519% | Aug 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +47,519% | Oct 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +47,519% | Jul 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +47,519% | Dec 2023 |
|
SANTA CRUZ WASTEWATER TREATMENT PLANT
SANTA CRUZ, CA
|
0.00 mg/L | 0.00 | +35,614% | May 2016 |
|
SANTA CRUZ WASTEWATER TREATMENT PLANT
SANTA CRUZ, CA
|
0.00 mg/L | 0.00 | +35,614% | Nov 2015 |
|
JEFFERSON DAVIS PARISH SANITARY LANDFILL COMMISSION
WELSH, LA
|
0.00 mg/L | 0.00 | +32,400% | Sep 2025 |
|
JEFFERSON DAVIS PARISH SANITARY LANDFILL COMMISSION
WELSH, LA
|
0.00 mg/L | 0.00 | +32,400% | Jun 2025 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +23,710% | Oct 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +23,710% | Jul 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +23,710% | Sep 2023 |
|
LOLETA WWTF
LOLETA, CA
|
0.00 mg/L | 0.00 | +23,710% | Aug 2023 |