TRI Reporter
Clean Air Act
Clean Water Act
AEPCO - APACHE GENERATING STATION
Quick Summary
- •Released 138,736 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Assessed $0 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
3525 N US HWY 191
COCHISE, AZ 85606
View on map ↗ - County
- COCHISE County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221112
- Inspections
- 3 · last Nov 18, 2025
- Total Penalties
- $0 · last Apr 12, 1993
- Registry ID
- 110043804390
How This Compares
#14
of 245 TRI reporters in AZ
#236
of 584 TRI reporters in Utilities
Ranked by most recent year's total TRI releases.
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2024)
-86% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 256,274 | — |
| 2016 | 132,658 | -48% |
| 2017 | 138,736 | +5% |
| 2018 | 55,341 | -60% |
| 2019 | 4,056 | -93% |
| 2020 | 66,787 | +1547% |
| 2021 | 144,314 | +116% |
| 2022 | 179,460 | +24% |
| 2023 | 73,386 | -59% |
| 2024 | 35,455 | -52% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 25,969 | 18 | — | 25,950 | — | |
| Manganese compounds | 5,085 | 13 | — | 5,072 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,242 | 1,242 | — | — | — | |
| Copper compounds | 1,143 | 1 | — | 1,143 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 907 | 907 | — | — | — | |
| Lead compounds | 681 | 1 | — | 680 | — | |
| Cobalt compounds | 263 | 0 | — | 263 | — | ♦ Carcinogen |
| Hydrogen fluoride | 139 | 139 | — | — | — | |
| Mercury | 25 | 3 | — | 23 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 46,164 | 63 | — | 46,102 | — | |
| Manganese compounds | 9,242 | 23 | — | 9,219 | — | |
| Vanadium compounds | 3,642 | 5 | — | 3,637 | — | |
| Zinc compounds | 2,356 | 3 | — | 2,353 | — | |
| Hydrogen fluoride | 2,320 | 2,320 | — | — | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2,133 | 2,133 | — | — | — | |
| Copper compounds | 2,019 | — | — | 2,019 | — | |
| Nickel | 1,632 | 496 | — | 1,136 | — | ♦ Carcinogen |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,614 | 3 | — | 1,611 | — | |
| Lead compounds | 1,198 | 2 | — | 1,196 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 534 | 534 | — | — | — | |
| Cobalt compounds | 474 | 1 | — | 473 | — | ♦ Carcinogen |
| Mercury | 59 | 6 | — | 52 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 115,212 | 128 | — | 115,084 | — | |
| Manganese compounds | 22,454 | 36 | — | 22,417 | — | |
| Vanadium compounds | 9,191 | 10 | — | 9,180 | — | |
| Hydrogen fluoride | 6,704 | 6,704 | — | — | — | |
| Zinc compounds | 5,819 | 6 | — | 5,813 | — | |
| Copper compounds | 5,020 | 6 | — | 5,015 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 4,990 | 4,990 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 4,021 | 6 | — | 4,015 | — | |
| Lead compounds | 2,978 | 3 | — | 2,975 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,755 | 1,755 | — | — | — | |
| Cobalt compounds | 1,198 | 1 | — | 1,197 | — | ♦ Carcinogen |
| Mercury | 117 | 10 | — | 107 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 91,373 | 216 | — | 91,157 | — | |
| Manganese compounds | 17,819 | 48 | — | 17,771 | — | |
| Vanadium compounds | 7,177 | 17 | — | 7,160 | — | |
| Hydrogen fluoride | 4,749 | 4,749 | — | — | — | |
| Zinc compounds | 4,584 | 11 | — | 4,574 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 4,041 | 4,041 | — | — | — | |
| Copper compounds | 3,959 | 9 | — | 3,950 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 3,130 | 8 | — | 3,122 | — | |
| Lead compounds | 2,308 | 5 | — | 2,302 | — | |
| Nickel | 2,261 | 25 | — | 2,236 | — | ♦ Carcinogen |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,875 | 1,875 | — | — | — | |
| Cobalt compounds | 933 | 2 | — | 931 | — | ♦ Carcinogen |
| Mercury | 106 | 8 | — | 98 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 40,505 | 83 | — | 40,422 | — | |
| Manganese compounds | 9,131 | 24 | — | 9,107 | — | |
| Vanadium compounds | 3,027 | 6 | — | 3,021 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2,806 | 2,806 | — | — | — | |
| Zinc compounds | 2,166 | 4 | — | 2,162 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2,102 | 2,102 | — | — | — | |
| Copper compounds | 1,720 | 3 | — | 1,717 | — | |
| Hydrogen fluoride | 1,627 | 1,627 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,304 | 4 | — | 1,300 | — | |
| Nickel | 982 | 39 | — | 943 | — | ♦ Carcinogen |
| Lead compounds | 970 | 2 | — | 968 | — | |
| Cobalt compounds | 391 | 1 | — | 390 | — | ♦ Carcinogen |
| Mercury | 55 | 5 | — | 50 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2019
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | 1,409 | 4 | — | 1,405 | — | |
| Hydrogen fluoride | 1,299 | 1,299 | — | — | — | |
| Copper compounds | 1,104 | 3 | — | 1,100 | — | |
| Cobalt compounds | 244 | 1 | — | 244 | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 32,250 | 67 | — | 32,183 | — | |
| Manganese compounds | 6,330 | 21 | — | 6,309 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 3,282 | 3,282 | — | — | — | |
| Hydrogen fluoride | 2,848 | 2,848 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 2,311 | 2,311 | — | — | — | |
| Vanadium compounds | 2,275 | 5 | — | 2,270 | — | |
| Zinc compounds | 1,563 | 3 | — | 1,560 | — | |
| Copper compounds | 1,353 | 3 | — | 1,350 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,103 | 3 | — | 1,099 | — | |
| Lead compounds | 857 | 2 | — | 855 | — | |
| Nickel | 774 | 26 | — | 748 | — | ♦ Carcinogen |
| Cobalt compounds | 333 | 1 | — | 332 | — | ♦ Carcinogen |
| Mercury | 63 | 4 | — | 59 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 89,445 | 165 | — | 89,279 | — | |
| Manganese compounds | 16,544 | 47 | — | 16,497 | — | |
| Vanadium compounds | 5,945 | 11 | — | 5,934 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 5,400 | 5,400 | — | — | — | |
| Hydrogen fluoride | 4,950 | 4,950 | — | — | — | |
| Zinc compounds | 3,781 | 7 | — | 3,774 | — | |
| Copper compounds | 3,283 | 6 | — | 3,277 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 2,744 | 7 | — | 2,737 | — | |
| Lead compounds | 2,272 | 4 | — | 2,267 | — | |
| Nickel | 1,852 | 3 | — | 1,848 | — | ♦ Carcinogen |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,563 | 1,563 | — | — | — | |
| Cobalt compounds | 836 | 2 | — | 835 | — | ♦ Carcinogen |
| Mercury | 122 | 12 | — | 110 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 74,787 | 202 | — | 74,586 | — | |
| Manganese compounds | 18,219 | 47 | — | 18,171 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 10,093 | 10,093 | — | — | — | |
| Hydrogen fluoride | 10,034 | 10,034 | — | — | — | |
| Vanadium compounds | 5,164 | 14 | — | 5,150 | — | |
| Zinc compounds | 3,657 | 9 | — | 3,648 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 2,644 | 8 | — | 2,636 | — | |
| Copper compounds | 2,596 | 7 | — | 2,590 | — | |
| Lead compounds | 2,399 | 6 | — | 2,393 | — | |
| Nickel | 1,590 | 4 | — | 1,586 | — | ♦ Carcinogen |
| Cobalt compounds | 697 | 2 | — | 695 | — | ♦ Carcinogen |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 619 | 619 | — | — | — | |
| Mercury | 158 | 32 | — | 126 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 105,135 | 125 | — | 105,009 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 54,232 | 54,232 | — | — | — | |
| Manganese compounds | 28,523 | 50 | — | 28,473 | — | |
| Hydrogen fluoride | 21,368 | 21,368 | — | — | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 12,743 | 12,743 | — | — | — | |
| Vanadium compounds | 9,834 | 12 | — | 9,822 | — | |
| Zinc compounds | 6,385 | 7 | — | 6,378 | — | |
| Copper compounds | 4,770 | 6 | — | 4,764 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 4,754 | 8 | — | 4,747 | — | |
| Lead compounds | 3,907 | 5 | — | 3,902 | — | |
| Nickel | 3,060 | 4 | — | 3,057 | — | ♦ Carcinogen |
| Cobalt compounds | 1,386 | 2 | — | 1,384 | — | ♦ Carcinogen |
| Mercury | 178 | 62 | — | 115 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
Judicial
· Case 09-1992-0082
Administrative - Formal
· Case 09-2001-0116 · Dec 1, 2000
Judicial
· Case 09-1989-0030 · Apr 12, 1993
$120,000
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