Sioux
WEST ALTON, MO · Saint Charles · NAICS 221112
Data updated May 2026
Sioux sits in the upper third of EPA GHGRP reporters by latest CO₂e (#149 of 8,713 nationally, #5 of 131 in MO).
- National rank #149 of 8,713 GHGRP facilities
- #5 of 131 in MO
- #118 of 1,732 in Power Plants
- 16.3% of AMEREN parent CO₂e
- 2023 mix: 0.8% non-CO₂ (N₂O-led)
- -36.6% since 2011
Sioux vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
3,233,285 149th of 8713 higher than 8,564 of 8,713 facilities
GHGRP facilities, banded by latest reported CO₂e (MT)
Each bar is a band; taller bars hold more facilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA Greenhouse Gas Reporting Program · 2023
Facility footprint context
This site accounts for 16.3% of AMEREN reported parent CO₂e (3.2M MT of 19.9M MT ; #2 of 11 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #118 of 1,732 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 3.2M MT CO₂e reported for 2023, non-CO₂ gases are 0.8% , led by N₂O at 0.5% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.2%
- 3.2M MT
- CH₄
- 0.3%
- 9K MT
- N₂O
- 0.5%
- 16K MT
Emissions decline across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 3,233,285 |
| 2022 | 3,856,622 |
| 2021 | 4,008,604 |
| 2020 | 2,897,754 |
| 2019 | 4,029,490 |
| 2018 | 5,711,363 |
| 2017 | 5,146,392 |
| 2016 | 4,553,539 |
| 2015 | 4,314,760 |
| 2014 | 4,720,464 |
| 2013 | 4,730,255 |
| 2012 | 4,529,980 |
| 2011 | 5,102,517 |
Facility insight: Sioux
Sioux (GHGRP ID 1007202) is a high-volume reporter at 3.2M MT CO₂e in 2023 from WEST ALTON, MO (#149 of 8,713 nationally) under Power Plants (NAICS 221112).
Across 2011–2023, annual CO₂e fell 36.6%; peak load was 5.7M MT in 2018. This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2018 at 5.7M MT CO2e; latest 2023 sits 43.4% below that peak (3.2M MT). The largest year-to-year move was 2018→2019 (-29.4%, 1.7M MT).
Frequently Asked Questions
Where does Sioux rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Sioux ranks #149 of 8,713 reporting facilities by latest reported CO₂e, and #5 of 131 facilities in MO (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Sioux? ▼
Sioux's 3.2M MT CO₂e is higher than 8,564 of the 8,713 GHGRP facilities with reported emissions (98%), an exact count from the full corpus, not an estimate.
How much CO2 does Sioux emit? ▼
Sioux reported 3.2M MT CO2e in 2023.
What share of AMEREN does Sioux represent? ▼
Sioux accounts for 16.3% of AMEREN's reported GHGRP CO₂e (3.2M MT of 19.9M MT), ranking #2 of 11 facilities under that parent.
What is Sioux's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.8% of reported CO₂e at Sioux, with N₂O the larger non-CO₂ share at 0.5% (CO₂ 99.2%). Shares use the facility's GHGRP gas components for that year.
Where does Sioux rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, Sioux ranks #118 of 1,732 by latest reported CO₂e.
Is Sioux reducing emissions? ▼
Over 13 reporting years (2011–2023), Sioux's emissions have decreased by 36.6%. This suggests meaningful progress in emissions reduction.
Nationwide facilities with similar CO₂e or sector
Peer sets outside MO for a top-third GHGRP emitter: CO₂e totals first, then Power Plants neighbors.
Similar reported CO₂e
Nearest latest-year facility totals outside MO (3.2M MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside MO.