Wygen III
GILLETTE, WY · Campbell · NAICS 221112
Data updated May 2026
Wygen III sits in the upper third of EPA GHGRP reporters by latest CO₂e (#706 of 8,713 nationally, #12 of 132 in WY).
- National rank #706 of 8,713 GHGRP facilities
- #12 of 132 in WY
- #493 of 1,732 in Power Plants
- 25.2% of BLACK HILLS parent CO₂e
- 2023 mix: 0.8% non-CO₂ (N₂O-led)
- +0.1% since 2011
Wygen III vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
874,717 706th of 8713 higher than 8,007 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 25.2% of BLACK HILLS reported parent CO₂e (875K MT of 3.5M MT ; #1 of 7 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #493 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 875K 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%
- 868K MT
- CH₄
- 0.3%
- 3K MT
- N₂O
- 0.5%
- 4K MT
High-emitter reporting timeline
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 874,717 |
| 2022 | 897,260 |
| 2021 | 908,052 |
| 2020 | 924,747 |
| 2019 | 836,972 |
| 2018 | 969,300 |
| 2017 | 854,900 |
| 2016 | 882,442 |
| 2015 | 828,737 |
| 2014 | 899,173 |
| 2013 | 891,610 |
| 2012 | 916,308 |
| 2011 | 874,024 |
Facility insight: Wygen III
Wygen III (GHGRP ID 1000528) is a high-volume reporter at 875K MT CO₂e in 2023 from GILLETTE, WY (#706 of 8,713 nationally) under Power Plants (NAICS 221112).
Over 13 years (2011–2023), emissions stayed within a narrow band around 875K MT CO₂e (peak 969K MT). This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2018 at 969K MT CO2e; latest 2023 sits 9.8% below that peak (875K MT). The largest year-to-year move was 2018→2019 (-13.7%, 132K MT).
Frequently Asked Questions
Where does Wygen III rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Wygen III ranks #706 of 8,713 reporting facilities by latest reported CO₂e, and #12 of 132 facilities in WY (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Wygen III? ▼
Wygen III's 875K MT CO₂e is higher than 8,007 of the 8,713 GHGRP facilities with reported emissions (92%), an exact count from the full corpus, not an estimate.
How much CO2 does Wygen III emit? ▼
Wygen III reported 875K MT CO2e in 2023.
What share of BLACK HILLS does Wygen III represent? ▼
Wygen III accounts for 25.2% of BLACK HILLS's reported GHGRP CO₂e (875K MT of 3.5M MT), ranking #1 of 7 facilities under that parent.
What is Wygen III's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.8% of reported CO₂e at Wygen III, 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 Wygen III rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, Wygen III ranks #493 of 1,732 by latest reported CO₂e.
Is Wygen III reducing emissions? ▼
Over 13 reporting years (2011–2023), Wygen III's emissions have increased by 0.1%. Emissions have remained relatively stable.
Nationwide facilities with similar CO₂e or sector
Peer sets outside WY for a top-third GHGRP emitter: CO₂e totals first, then Power Plants neighbors.
Similar reported CO₂e
Nearest latest-year facility totals outside WY (875K MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside WY.