Neptune Gas Plant
Centerville, LA · WEST CARROLL PARISH · NAICS 211130
Data updated May 2026
Neptune Gas Plant sits in the upper third of EPA GHGRP reporters by latest CO₂e (#2,232 of 8,713 nationally, #148 of 531 in LA).
- National rank #2,232 of 8,713 GHGRP facilities
- #148 of 531 in LA
- #204 of 2,099 in Petroleum and Natural Gas Systems
- 100% of MARATHON OIL parent CO₂e
- 2023 mix: 4.2% non-CO₂ (CH₄-led)
- +64.7% since 2011
Neptune Gas Plant vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
127,661 2232nd of 8713 higher than 6,481 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 100% of MARATHON OIL reported parent CO₂e (128K MT of 128K MT ). Inside the EPA Petroleum and Natural Gas Systems sector it ranks #204 of 2,099 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 128K MT CO₂e reported for 2023, non-CO₂ gases are 4.2% , led by CH₄ at 4.1% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 95.8%
- 122K MT
- CH₄
- 4.1%
- 5K MT
- N₂O
- 0.1%
- 69 MT
Emissions growth across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 127,661 |
| 2022 | 151,214 |
| 2021 | 144,156 |
| 2020 | 131,226 |
| 2019 | 144,522 |
| 2018 | 143,905 |
| 2017 | 144,856 |
| 2016 | 166,439 |
| 2015 | 166,602 |
| 2014 | 157,003 |
| 2013 | 161,818 |
| 2012 | 158,165 |
| 2011 | 77,517 |
Facility insight: Neptune Gas Plant
Neptune Gas Plant (GHGRP ID 1005069) is a high-volume reporter at 128K MT CO₂e in 2023 from Centerville, LA (#2,232 of 8,713 nationally) under Petroleum and Natural Gas Systems (NAICS 211130).
From 2011 to 2023, reported CO₂e rose 64.7% (peak 167K MT). This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2015 at 167K MT CO2e; latest 2023 sits 23.4% below that peak (128K MT). The largest year-to-year move was 2011→2012 (+104.0%, 81K MT).
Frequently Asked Questions
Where does Neptune Gas Plant rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Neptune Gas Plant ranks #2,232 of 8,713 reporting facilities by latest reported CO₂e, and #148 of 531 facilities in LA (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Neptune Gas Plant? ▼
Neptune Gas Plant's 128K MT CO₂e is higher than 6,481 of the 8,713 GHGRP facilities with reported emissions (74%), an exact count from the full corpus, not an estimate.
How much CO2 does Neptune Gas Plant emit? ▼
Neptune Gas Plant reported 128K MT CO2e in 2023.
What share of MARATHON OIL does Neptune Gas Plant represent? ▼
Neptune Gas Plant accounts for 100% of MARATHON OIL's reported GHGRP CO₂e (128K MT of 128K MT).
What is Neptune Gas Plant's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 4.2% of reported CO₂e at Neptune Gas Plant, with CH₄ the larger non-CO₂ share at 4.1% (CO₂ 95.8%). Shares use the facility's GHGRP gas components for that year.
Where does Neptune Gas Plant rank inside Petroleum and Natural Gas Systems? ▼
Among EPA GHGRP facilities tagged Petroleum and Natural Gas Systems, Neptune Gas Plant ranks #204 of 2,099 by latest reported CO₂e.
Is Neptune Gas Plant reducing emissions? ▼
Over 13 reporting years (2011–2023), Neptune Gas Plant's emissions have increased by 64.7%. This may reflect expanded operations or increased production.
Nationwide facilities with similar CO₂e or sector
Peer sets outside LA for a top-third GHGRP emitter: CO₂e totals first, then Petroleum and Natural Gas Systems neighbors.
Similar reported CO₂e
Nearest latest-year facility totals outside LA (128K MT here).
Similar Petroleum and Natural Gas Systems CO₂e
Nearest same-sector facility totals outside LA.