Mariposa Energy, LLC
Byron, CA · ALAMEDA COUNTY · NAICS 221112
Data updated May 2026
According to the EPA Greenhouse Gas Reporting Program, Mariposa Energy, LLC ranks #4,382 of 8,713 U.S. reporting facilities by latest reported CO₂e and #224 of 549 facilities in CA.
- National rank #4,382 of 8,713 GHGRP facilities
- #224 of 549 in CA
- #1,152 of 1,732 in Power Plants
- 35.5% of MITSUBISHI CORP (AMERICAS) parent CO₂e
- 2023 mix: 0.1% non-CO₂ (N₂O-led)
- +8.6% since 2012
Mariposa Energy, LLC vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
47,679 4382nd of 8713 higher than 4,331 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 35.5% of MITSUBISHI CORP (AMERICAS) reported parent CO₂e (48K MT of 134K MT ; #2 of 4 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #1,152 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 48K MT CO₂e reported for 2023, non-CO₂ gases are 0.1% , led by N₂O at 0.1% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.9%
- 48K MT
- CH₄
- 0%
- 22 MT
- N₂O
- 0.1%
- 26 MT
Annual emissions history
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 47,679 |
| 2022 | 52,038 |
| 2021 | 50,609 |
| 2020 | 61,710 |
| 2019 | 52,955 |
| 2018 | 65,311 |
| 2017 | 79,955 |
| 2016 | 49,817 |
| 2015 | 47,447 |
| 2014 | 56,777 |
| 2013 | 44,508 |
| 2012 | 43,893 |
Facility insight: Mariposa Energy, LLC
Mariposa Energy, LLC (EPA GHGRP Facility ID 1000051) reported 48K metric tons of CO2-equivalent in 2023, operating in Byron, CA within ALAMEDA COUNTY. Among GHGRP reporters it ranks #4,382 of 8,713 nationally by latest CO₂e and #224 of 549 in CA. The site is classified under Power Plants with NAICS code 221112.
Over 12 years (2012–2023), emissions stayed within a narrow band around 48K MT CO₂e (peak 80K MT). This facility has filed every year from 2012 to 2023, a complete 12-year record.
Peak year was 2017 at 80K MT CO2e; latest 2023 sits 40.4% below that peak (48K MT). The largest year-to-year move was 2016→2017 (+60.5%, 30K MT).
Frequently Asked Questions
Where does Mariposa Energy, LLC rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Mariposa Energy, LLC ranks #4,382 of 8,713 reporting facilities by latest reported CO₂e, and #224 of 549 facilities in CA (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Mariposa Energy, LLC? ▼
Mariposa Energy, LLC's 48K MT CO₂e is higher than 4,331 of the 8,713 GHGRP facilities with reported emissions (50%), an exact count from the full corpus, not an estimate.
How much CO2 does Mariposa Energy, LLC emit? ▼
Mariposa Energy, LLC reported 48K MT CO2e in 2023.
What share of MITSUBISHI CORP (AMERICAS) does Mariposa Energy, LLC represent? ▼
Mariposa Energy, LLC accounts for 35.5% of MITSUBISHI CORP (AMERICAS)'s reported GHGRP CO₂e (48K MT of 134K MT), ranking #2 of 4 facilities under that parent.
What is Mariposa Energy, LLC's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.1% of reported CO₂e at Mariposa Energy, LLC, with N₂O the larger non-CO₂ share at 0.1% (CO₂ 99.9%). Shares use the facility's GHGRP gas components for that year.
Where does Mariposa Energy, LLC rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, Mariposa Energy, LLC ranks #1,152 of 1,732 by latest reported CO₂e.
Is Mariposa Energy, LLC reducing emissions? ▼
Over 12 reporting years (2012–2023), Mariposa Energy, LLC's emissions have increased by 8.6%. Emissions have remained relatively stable.
Nationwide facilities with similar CO₂e or sector
Two GHGRP-derived peer sets for Mariposa Energy, LLC, both outside CA so the neighborhoods are not state-geo containment.
Similar reported CO₂e
Nearest latest-year facility totals outside CA (48K MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside CA.