Non-Compliance
TRI Reporter
Clean Air Act
Clean Water Act
RCRA
AMEREN MISSOURI SIOUX ENERGY CENTER
Quick Summary
- •Released 1,031,403 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
8501 N ST ROUTE 94
WEST ALTON, MO 63386
View on map ↗ - County
- ST. CHARLES County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221112
- Inspections
- 6 · last Jan 16, 2026
- Total Penalties
- $0 · last Jan 21, 1993
- Registry ID
- 110064610292
How This Compares
#13
of 454 TRI reporters in MO
#94
of 584 TRI reporters in Utilities
Ranked by most recent year's total TRI releases.
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
0
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
2
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
1
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
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)
-55% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 1,331,184 | — |
| 2016 | 1,088,483 | -18% |
| 2017 | 1,031,403 | -5% |
| 2018 | 1,822,935 | +77% |
| 2019 | 660,980 | -64% |
| 2020 | 733,044 | +11% |
| 2021 | 892,731 | +22% |
| 2022 | 796,721 | -11% |
| 2023 | 629,272 | -21% |
| 2024 | 596,696 | -5% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 429,580 | 1,060 | 194 | 428,326 | 0 | |
| Ammonia | 51,360 | 51,097 | — | 263 | — | |
| Manganese compounds | 22,069 | 152 | — | 21,917 | 0 | |
| Vanadium compounds | 20,708 | 127 | — | 20,581 | 0 | |
| Zinc compounds | 20,116 | 966 | 28 | 19,122 | 0 | |
| Copper compounds | 15,607 | 115 | 7 | 15,485 | 1 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 14,557 | 14,557 | — | — | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 10,142 | 10,142 | — | — | — | |
| Hydrogen fluoride | 6,483 | 6,483 | — | — | — | |
| Lead compounds | 5,931 | 64 | — | 5,866 | 151 | |
| Mercury compounds | 133 | 12 | — | 121 | — | |
| Naphthalene | 10 | 10 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 449,679 | 732 | 213 | 448,734 | — | |
| Ammonia | 47,809 | 47,585 | — | 224 | — | |
| Zinc compounds | 29,010 | 894 | 30 | 28,086 | 0 | |
| Manganese compounds | 24,637 | 129 | — | 24,508 | — | |
| Vanadium compounds | 21,713 | 97 | — | 21,616 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 16,998 | 16,998 | — | — | — | |
| Copper compounds | 15,569 | 91 | 8 | 15,470 | 0 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 12,301 | 12,301 | — | — | — | |
| Lead compounds | 5,843 | 47 | — | 5,796 | 1 | |
| Hydrogen fluoride | 5,577 | 5,577 | — | — | — | |
| Mercury compounds | 125 | 13 | — | 111 | — | |
| Naphthalene | 10 | 10 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 504,410 | 534 | 202 | 503,674 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 121,537 | 121,537 | — | — | — | |
| Manganese compounds | 31,986 | 115 | — | 31,871 | — | |
| Zinc compounds | 31,157 | 868 | 29 | 30,260 | — | |
| Vanadium compounds | 31,043 | 95 | — | 30,948 | — | |
| Copper compounds | 21,257 | 96 | 7 | 21,154 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 15,259 | 96 | — | 15,163 | 1 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 14,823 | 14,823 | — | — | — | |
| Nickel compounds | 10,437 | 103 | — | 10,334 | — | ♦ Carcinogen |
| Hydrogen fluoride | 7,310 | 7,310 | — | — | — | |
| Lead compounds | 7,305 | 45 | — | 7,261 | 4 | |
| Mercury compounds | 184 | 22 | — | 162 | — | |
| Naphthalene | 12 | 12 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 573,419 | 634 | 215 | 572,570 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 136,895 | 136,895 | — | — | — | |
| Zinc compounds | 45,783 | 1,089 | 31 | 44,663 | — | |
| Manganese compounds | 39,083 | 144 | — | 38,939 | — | |
| Vanadium compounds | 31,551 | 104 | — | 31,447 | — | |
| Copper compounds | 21,198 | 104 | 8 | 21,086 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 14,127 | 100 | — | 14,027 | 1 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 13,712 | 13,712 | — | — | — | |
| Lead compounds | 8,395 | 51 | — | 8,344 | 3 | |
| Hydrogen fluoride | 8,357 | 8,357 | — | — | — | |
| Mercury compounds | 198 | 22 | — | 176 | — | |
| Naphthalene | 13 | 13 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 499,906 | 408 | 4,740 | 494,758 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 106,677 | 106,677 | — | — | — | |
| Zinc compounds | 29,558 | 665 | 293 | 28,600 | — | |
| Manganese compounds | 23,298 | 76 | — | 23,222 | — | |
| Vanadium compounds | 21,780 | 61 | — | 21,719 | — | |
| Copper compounds | 16,169 | 67 | — | 16,102 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 11,187 | 63 | 145 | 10,979 | 0 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 10,995 | 10,995 | — | — | — | |
| Lead compounds | 7,959 | 36 | 5 | 7,917 | 1 | |
| Hydrogen fluoride | 5,402 | 5,402 | — | — | — | |
| Mercury compounds | 104 | 14 | — | 91 | — | |
| Naphthalene | 9 | 9 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2019
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 599,927 | 344 | 4,266 | 595,317 | — | |
| Vanadium compounds | 28,508 | 61 | — | 28,447 | — | |
| Copper compounds | 19,328 | 70 | — | 19,258 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 13,205 | 61 | 100 | 13,044 | 10 | |
| Naphthalene | 12 | 12 | — | — | — | ♦ Carcinogen |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 1,362,600 | 477 | 15 | 1,362,108 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 182,289 | 182,289 | — | — | — | |
| Zinc compounds | 58,548 | 867 | 1 | 57,680 | — | |
| Vanadium compounds | 55,763 | 86 | — | 55,677 | — | |
| Copper compounds | 38,424 | 104 | — | 38,320 | — | |
| Manganese compounds | 31,106 | 86 | — | 31,020 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 26,436 | 26,436 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 22,018 | 80 | — | 21,938 | — | |
| Nickel compounds | 19,191 | 94 | — | 19,097 | — | ♦ Carcinogen |
| Lead compounds | 13,857 | 45 | — | 13,813 | 23 | |
| Hydrogen fluoride | 12,378 | 12,378 | — | — | — | |
| Mercury compounds | 321 | 28 | — | 293 | 8 | |
| Polycyclic aromatic compounds | 3 | 3 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 671,740 | 611 | 15 | 671,114 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 165,891 | 165,891 | — | — | — | |
| Zinc compounds | 47,704 | 952 | 1 | 46,751 | — | |
| Vanadium compounds | 31,087 | 90 | — | 30,997 | — | |
| Copper compounds | 24,859 | 107 | — | 24,752 | — | |
| Manganese compounds | 24,725 | 113 | — | 24,612 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 18,482 | 18,482 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 15,272 | 86 | — | 15,186 | — | |
| Nickel compounds | 11,182 | 96 | — | 11,086 | — | ♦ Carcinogen |
| Lead compounds | 10,513 | 48 | — | 10,465 | 44 | |
| Hydrogen fluoride | 9,764 | 9,764 | — | — | — | |
| Mercury compounds | 180 | 27 | — | 153 | 6 | |
| Polycyclic aromatic compounds | 3 | 3 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 814,570 | 448 | 15 | 814,107 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 108,308 | 108,308 | — | — | — | |
| Vanadium compounds | 37,365 | 73 | — | 37,292 | — | |
| Zinc compounds | 33,977 | 700 | 1 | 33,276 | — | |
| Copper compounds | 27,427 | 89 | — | 27,338 | — | |
| Manganese compounds | 26,697 | 80 | — | 26,617 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 15,198 | 62 | — | 15,136 | — | |
| Hydrogen fluoride | 9,471 | 9,471 | — | — | — | |
| Lead compounds | 8,707 | 35 | — | 8,672 | 19 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 6,603 | 6,603 | — | — | — | |
| Mercury compounds | 157 | 24 | — | 133 | 26 | |
| Polycyclic aromatic compounds | 2 | 2 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ Carcinogen |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 927,703 | 423 | 11 | 927,269 | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 114,729 | 114,729 | — | — | — | |
| Zinc compounds | 60,956 | 817 | — | 60,139 | — | |
| Vanadium compounds | 57,117 | 81 | — | 57,036 | — | |
| Manganese compounds | 37,887 | 86 | — | 37,801 | — | |
| Copper compounds | 35,145 | 93 | — | 35,052 | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 24,705 | 24,705 | — | — | — | |
| Nickel compounds | 22,418 | 86 | — | 22,332 | — | ♦ Carcinogen |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 22,249 | 74 | — | 22,175 | — | |
| Lead compounds | 18,297 | 46 | — | 18,251 | 2 | |
| Hydrogen fluoride | 9,735 | 9,735 | — | — | — | |
| Mercury compounds | 240 | 24 | — | 216 | 30 | |
| Polycyclic aromatic compounds | 3 | 3 | — | — | — | ♦ Carcinogen |
| Dioxin and dioxin-like compounds | 1 | 1 | — | — | — | ♦ 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 |
|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | — | — | — | 350,298 |
| Hydrogen fluoride | — | — | — | 194,148 |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | — | — | — | 538,320 |
| Ammonia | — | — | — | 7,769 |
| Lead compounds | — | 1 | — | — |
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
ROXANA SANITARY LANDFILL
EDWARDSVILLE, IL
|
Vanadium compounds | 0 | — | — | — |
|
ROXANA SANITARY LANDFILL
EDWARDSVILLE, IL
|
Manganese compounds | 0 | — | — | — |
|
SAFETY-KLEEN
ST CHARLES, MO
|
Lead compounds | — | 1 | — | — |
|
VALICOR ENVIRONMENTAL SERVICES, LLC
ST LOUIS, MO
|
Lead compounds | 0 | — | — | — |
|
CLEAN EARTH OF CALVERT CITY LLC
CALVERT CITY, KY
|
Lead compounds | 150 | — | — | — |
|
VALICOR ENVIRONMENTAL SERVICES, LLC
ST LOUIS, MO
|
Zinc compounds | 0 | — | — | — |
|
ROXANA SANITARY LANDFILL
EDWARDSVILLE, IL
|
Zinc compounds | 0 | — | — | — |
|
VALICOR ENVIRONMENTAL SERVICES, LLC
ST LOUIS, MO
|
Copper compounds | 1 | — | — | — |
|
ROXANA SANITARY LANDFILL
EDWARDSVILLE, IL
|
Copper compounds | 0 | — | — | — |
|
ROXANA SANITARY LANDFILL
EDWARDSVILLE, IL
|
Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 0 | — | — | — |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Aug 7, 2024 | Aug 13, 2024 | Resolved |
| rcra | Standards for Used Oil: Generators | Aug 7, 2024 | Aug 13, 2024 | Resolved |
| rcra | Standards for the Management of Used Oil: Applicability | Aug 7, 2024 | Aug 13, 2024 | Resolved |
| caa | FRV | Jun 6, 2022 | — | Open |
| caa | FRV | Oct 21, 2021 | — | Open |
| caa | FRV | Dec 15, 2020 | — | Open |
| cwa | WW Storm Water Construction - Failure to develop any or adequate SWPPP/SWMP | Jan 30, 2019 | Mar 5, 2019 | Resolved |
| rcra | Standards Applicable to Generators of HW: Manifest Requirements Applicable to Small and Large Quantity Generators | Jan 20, 1993 | Mar 18, 1993 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jan 20, 1993 | Mar 18, 1993 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| E. coli | DMR, Limited - Numeric Violation | 147.50 MPN/100mL | 126.00 | +17% | Sep 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 70.00 mg/L | 30.00 | +133% | Mar 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 70.00 mg/L | 45.00 | +56% | Mar 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 53.00 mg/L | 45.00 | +18% | Jun 2018 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 53.00 mg/L | 30.00 | +77% | Jun 2018 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 36.00 mg/L | 30.00 | +20% | Mar 2018 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 31.20 mg/L | 30.00 | +4% | Feb 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 106.00 mg/L | 45.00 | +136% | Feb 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 106.00 mg/L | 30.00 | +253% | Feb 2017 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 73.00 mg/L | 30.00 | +143% | Nov 2015 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 111.00 mg/L | 45.00 | +147% | Nov 2015 | Open |
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.
Warning Letter
Clean Air Act
· Case 3603267783 · Jun 6, 2022
Warning Letter
Clean Air Act
· Case 3602872334 · Oct 21, 2021
Warning Letter
Clean Air Act
· Case 3602401934 · Dec 15, 2020
Judicial
· Case 07-2009-0268 · Sep 30, 2019
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-MOD086817954-000 · Feb 18, 1993
Administrative - Formal
· Case 07-1991-0432 · Jan 21, 1993
$37,235
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