Marianas Energy Company
Piti, GU · GUAM · NAICS 221112
Data updated May 2026
Marianas Energy Company sits in the upper third of EPA GHGRP reporters by latest CO₂e (#1,127 of 8,713 nationally, #1 of 10 in GU).
- National rank #1,127 of 8,713 GHGRP facilities
- #1 of 10 in GU
- #671 of 1,732 in Power Plants
- 15% of OSAKA GAS ENERGY AMERICA parent CO₂e
- 2023 mix: 0.3% non-CO₂ (N₂O-led)
- -1.9% since 2011
Marianas Energy Company vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
407,086 1127th of 8713 higher than 7,586 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 15% of OSAKA GAS ENERGY AMERICA reported parent CO₂e (407K MT of 2.7M MT ; #3 of 4 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #671 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 407K MT CO₂e reported for 2023, non-CO₂ gases are 0.3% , led by N₂O at 0.2% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.7%
- 406K MT
- CH₄
- 0.1%
- 412 MT
- N₂O
- 0.2%
- 981 MT
High-emitter reporting timeline
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 407,086 |
| 2022 | 282,195 |
| 2021 | 421,063 |
| 2020 | 417,169 |
| 2019 | 390,748 |
| 2018 | 414,768 |
| 2017 | 415,059 |
| 2016 | 413,586 |
| 2015 | 426,011 |
| 2014 | 439,004 |
| 2013 | 415,835 |
| 2012 | 341,849 |
| 2011 | 415,053 |
Facility insight: Marianas Energy Company
Marianas Energy Company (GHGRP ID 1011451) is a high-volume reporter at 407K MT CO₂e in 2023 from Piti, GU (#1,127 of 8,713 nationally) under Power Plants (NAICS 221112).
Over 13 years (2011–2023), emissions stayed within a narrow band around 407K MT CO₂e (peak 439K MT). This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2014 at 439K MT CO2e; latest 2023 sits 7.3% below that peak (407K MT). The largest year-to-year move was 2021→2022 (-33.0%, 139K MT).
Frequently Asked Questions
Where does Marianas Energy Company rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Marianas Energy Company ranks #1,127 of 8,713 reporting facilities by latest reported CO₂e, and #1 of 10 facilities in GU (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Marianas Energy Company? ▼
Marianas Energy Company's 407K MT CO₂e is higher than 7,586 of the 8,713 GHGRP facilities with reported emissions (87%), an exact count from the full corpus, not an estimate.
How much CO2 does Marianas Energy Company emit? ▼
Marianas Energy Company reported 407K MT CO2e in 2023.
What share of OSAKA GAS ENERGY AMERICA does Marianas Energy Company represent? ▼
Marianas Energy Company accounts for 15% of OSAKA GAS ENERGY AMERICA's reported GHGRP CO₂e (407K MT of 2.7M MT), ranking #3 of 4 facilities under that parent.
What is Marianas Energy Company's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.3% of reported CO₂e at Marianas Energy Company, with N₂O the larger non-CO₂ share at 0.2% (CO₂ 99.7%). Shares use the facility's GHGRP gas components for that year.
Where does Marianas Energy Company rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, Marianas Energy Company ranks #671 of 1,732 by latest reported CO₂e.
Is Marianas Energy Company reducing emissions? ▼
Over 13 reporting years (2011–2023), Marianas Energy Company's emissions have decreased by 1.9%. Emissions have remained relatively stable.
Nationwide facilities with similar CO₂e or sector
Peer sets outside GU for a top-third GHGRP emitter: CO₂e totals first, then Power Plants neighbors.
Similar reported CO₂e
Nearest latest-year facility totals outside GU (407K MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside GU.