Rolls-Royce Stennis Outdoor Test Facility
Stennis Space Center, MS · HANCOCK COUNTY · NAICS 336412
Data updated May 2026
Rolls-Royce Stennis Outdoor Test Facility ranks among smaller GHGRP totals (#8,219 of 8,713 nationally; #125 of 132 in MS), a lower-footprint comparator in Other.
- National rank #8,219 of 8,713 GHGRP facilities
- #125 of 132 in MS
- #1,526 of 1,599 in Other
- 26.5% of ROLLS-ROYCE NORTH AMERICA (USA) HOLDINGS parent CO₂e
- 2023 mix: 0.3% non-CO₂ (N₂O-led)
- -89.0% since 2014
Rolls-Royce Stennis Outdoor Test Facility vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
2,905 8219th of 8713 higher than 494 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 26.5% of ROLLS-ROYCE NORTH AMERICA (USA) HOLDINGS reported parent CO₂e (3K MT of 11K MT ; #2 of 2 GHGRP facilities under that parent ). Inside the EPA Other sector it ranks #1,526 of 1,599 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 3K 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%
- 3K MT
- CH₄
- 0.1%
- 3 MT
- N₂O
- 0.2%
- 7 MT
Emissions decline across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 2,905 |
| 2022 | 2,246 |
| 2021 | 1,228 |
| 2020 | 1,739 |
| 2019 | 12,983 |
| 2018 | 16,980 |
| 2017 | 35,453 |
| 2016 | 22,982 |
| 2015 | 8,751 |
| 2014 | 26,435 |
Facility insight: Rolls-Royce Stennis Outdoor Test Facility
Rolls-Royce Stennis Outdoor Test Facility (ID 1011113) reported 3K MT CO₂e for 2023 in HANCOCK COUNTY, MS (#8,219 of 8,713 by latest CO₂e).
Across 2014–2023, annual CO₂e fell 89.0%; peak load was 35K MT in 2017. This facility has filed every year from 2014 to 2023, a complete 10-year record.
Peak year was 2017 at 35K MT CO2e; latest 2023 sits 91.8% below that peak (3K MT). The largest year-to-year move was 2017→2018 (-52.1%, 18K MT).
Frequently Asked Questions
Where does Rolls-Royce Stennis Outdoor Test Facility rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, Rolls-Royce Stennis Outdoor Test Facility ranks #8,219 of 8,713 reporting facilities by latest reported CO₂e, and #125 of 132 facilities in MS (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than Rolls-Royce Stennis Outdoor Test Facility? ▼
Rolls-Royce Stennis Outdoor Test Facility's 3K MT CO₂e is higher than 494 of the 8,713 GHGRP facilities with reported emissions (6%), an exact count from the full corpus, not an estimate.
How much CO2 does Rolls-Royce Stennis Outdoor Test Facility emit? ▼
Rolls-Royce Stennis Outdoor Test Facility reported 3K MT CO2e in 2023.
What share of ROLLS-ROYCE NORTH AMERICA (USA) HOLDINGS does Rolls-Royce Stennis Outdoor Test Facility represent? ▼
Rolls-Royce Stennis Outdoor Test Facility accounts for 26.5% of ROLLS-ROYCE NORTH AMERICA (USA) HOLDINGS's reported GHGRP CO₂e (3K MT of 11K MT), ranking #2 of 2 facilities under that parent.
What is Rolls-Royce Stennis Outdoor Test Facility's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.3% of reported CO₂e at Rolls-Royce Stennis Outdoor Test Facility, 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 Rolls-Royce Stennis Outdoor Test Facility rank inside Other? ▼
Among EPA GHGRP facilities tagged Other, Rolls-Royce Stennis Outdoor Test Facility ranks #1,526 of 1,599 by latest reported CO₂e.
Is Rolls-Royce Stennis Outdoor Test Facility reducing emissions? ▼
Over 10 reporting years (2014–2023), Rolls-Royce Stennis Outdoor Test Facility's emissions have decreased by 89%. This suggests meaningful progress in emissions reduction.
Nationwide facilities with similar CO₂e or sector
Lower-footprint peers outside MS: nearest CO₂e totals and same-sector reporters for context.
Similar reported CO₂e
Nearest latest-year facility totals outside MS (3K MT here).
Similar Other CO₂e
Nearest same-sector facility totals outside MS.