Wygen II
GILLETTE, WY · Campbell · NAICS 221112
Data updated May 2026
Wygen II sits in the upper third of EPA GHGRP reporters by latest CO₂e (#752 of 8,713 nationally, #15 of 132 in WY).
- National rank #752 of 8,713 GHGRP facilities
- #15 of 132 in WY
- #520 of 1,732 in Power Plants
- 23.4% of BLACK HILLS parent CO₂e
- 2023 mix: 0.8% non-CO₂ (N₂O-led)
- -2.5% since 2011
Wygen II vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
810,957 752nd of 8713 higher than 7,961 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 23.4% of BLACK HILLS reported parent CO₂e (811K MT of 3.5M MT ; #3 of 7 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #520 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 811K 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%
- 805K MT
- CH₄
- 0.3%
- 2K MT
- N₂O
- 0.5%
- 4K MT
High-emitter reporting timeline
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 810,957 |
| 2022 | 876,716 |
| 2021 | 780,968 |
| 2020 | 852,888 |
| 2019 | 853,456 |
| 2018 | 895,828 |
| 2017 | 857,281 |
| 2016 | 822,893 |
| 2015 | 770,723 |
| 2014 | 778,774 |
| 2013 | 762,882 |
| 2012 | 679,843 |
| 2011 | 831,452 |
Facility insight: Wygen II
Wygen II (GHGRP ID 1000465) is a high-volume reporter at 811K MT CO₂e in 2023 from GILLETTE, WY (#752 of 8,713 nationally) under Power Plants (NAICS 221112).
Over 13 years (2011–2023), emissions stayed within a narrow band around 811K MT CO₂e (peak 896K MT). This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2018 at 896K MT CO2e; latest 2023 sits 9.5% below that peak (811K MT). The largest year-to-year move was 2011→2012 (-18.2%, 152K MT).
Frequently Asked Questions
Where does Wygen II rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Wygen II ranks #752 of 8,713 reporting facilities by latest reported CO₂e, and #15 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 II? ▼
Wygen II's 811K MT CO₂e is higher than 7,961 of the 8,713 GHGRP facilities with reported emissions (91%), an exact count from the full corpus, not an estimate.
How much CO2 does Wygen II emit? ▼
Wygen II reported 811K MT CO2e in 2023.
What share of BLACK HILLS does Wygen II represent? ▼
Wygen II accounts for 23.4% of BLACK HILLS's reported GHGRP CO₂e (811K MT of 3.5M MT), ranking #3 of 7 facilities under that parent.
What is Wygen II's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.8% of reported CO₂e at Wygen II, 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 II rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, Wygen II ranks #520 of 1,732 by latest reported CO₂e.
Is Wygen II reducing emissions? ▼
Over 13 reporting years (2011–2023), Wygen II's emissions have decreased by 2.5%. 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 (811K MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside WY.