SEAWATER TREATMENT PLANT
Prudhoe Bay, AK · NORTH SLOPE · NAICS 211120
Data updated May 2026
SEAWATER TREATMENT PLANT sits in the upper third of EPA GHGRP reporters by latest CO₂e (#1,881 of 8,713 nationally, #29 of 77 in AK).
- National rank #1,881 of 8,713 GHGRP facilities
- #29 of 77 in AK
- #134 of 2,099 in Petroleum and Natural Gas Systems
- 2% of HILCORP ENERGY parent CO₂e
- 2023 mix: 0.1% non-CO₂ (N₂O-led)
- +27.7% since 2011
SEAWATER TREATMENT PLANT vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
165,230 1881st of 8713 higher than 6,832 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 2% of HILCORP ENERGY reported parent CO₂e (165K MT of 8.3M MT ; #8 of 20 GHGRP facilities under that parent ). Inside the EPA Petroleum and Natural Gas Systems sector it ranks #134 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 165K 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%
- 165K MT
- CH₄
- 0%
- 70 MT
- N₂O
- 0.1%
- 83 MT
Emissions growth across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 165,230 |
| 2022 | 161,270 |
| 2021 | 158,976 |
| 2020 | 178,738 |
| 2019 | 131,849 |
| 2018 | 103,878 |
| 2017 | 118,689 |
| 2016 | 88,584 |
| 2015 | 108,559 |
| 2014 | 146,820 |
| 2013 | 154,455 |
| 2012 | 175,382 |
| 2011 | 129,360 |
Facility insight: SEAWATER TREATMENT PLANT
SEAWATER TREATMENT PLANT (GHGRP ID 1007371) is a high-volume reporter at 165K MT CO₂e in 2023 from Prudhoe Bay, AK (#1,881 of 8,713 nationally) under Petroleum and Natural Gas Systems (NAICS 211120).
From 2011 to 2023, reported CO₂e rose 27.7% (peak 179K MT). This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2020 at 179K MT CO2e; latest 2023 sits 7.6% below that peak (165K MT). The largest year-to-year move was 2019→2020 (+35.6%, 47K MT).
Frequently Asked Questions
Where does SEAWATER TREATMENT PLANT rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, SEAWATER TREATMENT PLANT ranks #1,881 of 8,713 reporting facilities by latest reported CO₂e, and #29 of 77 facilities in AK (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than SEAWATER TREATMENT PLANT? ▼
SEAWATER TREATMENT PLANT's 165K MT CO₂e is higher than 6,832 of the 8,713 GHGRP facilities with reported emissions (78%), an exact count from the full corpus, not an estimate.
How much CO2 does SEAWATER TREATMENT PLANT emit? ▼
SEAWATER TREATMENT PLANT reported 165K MT CO2e in 2023.
What share of HILCORP ENERGY does SEAWATER TREATMENT PLANT represent? ▼
SEAWATER TREATMENT PLANT accounts for 2% of HILCORP ENERGY's reported GHGRP CO₂e (165K MT of 8.3M MT), ranking #8 of 20 facilities under that parent.
What is SEAWATER TREATMENT PLANT's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.1% of reported CO₂e at SEAWATER TREATMENT PLANT, 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 SEAWATER TREATMENT PLANT rank inside Petroleum and Natural Gas Systems? ▼
Among EPA GHGRP facilities tagged Petroleum and Natural Gas Systems, SEAWATER TREATMENT PLANT ranks #134 of 2,099 by latest reported CO₂e.
Is SEAWATER TREATMENT PLANT reducing emissions? ▼
Over 13 reporting years (2011–2023), SEAWATER TREATMENT PLANT's emissions have increased by 27.7%. This may reflect expanded operations or increased production.
Nationwide facilities with similar CO₂e or sector
Peer sets outside AK 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 AK (165K MT here).
Similar Petroleum and Natural Gas Systems CO₂e
Nearest same-sector facility totals outside AK.