PHILLIPS 66 SANTA MARIA REFINERY
ARROYO GRANDE, CA · SAN LUIS OBISPO COUNTY · NAICS 324110
Data updated May 2026
PHILLIPS 66 SANTA MARIA REFINERY ranks among smaller GHGRP totals (#7,435 of 8,713 nationally; #417 of 549 in CA), a lower-footprint comparator in Petroleum Product Suppliers.
- National rank #7,435 of 8,713 GHGRP facilities
- #417 of 549 in CA
- #72 of 83 in Petroleum Product Suppliers
- 0% of PHILLIPS 66 parent CO₂e
- 2023 mix: 0.4% non-CO₂ (N₂O-led)
- -95.0% since 2011
PHILLIPS 66 SANTA MARIA REFINERY vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
12,029 7435th of 8713 higher than 1,278 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 0% of PHILLIPS 66 reported parent CO₂e (12K MT of 24.6M MT ; #25 of 27 GHGRP facilities under that parent ). Inside the EPA Petroleum Product Suppliers sector it ranks #72 of 83 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 12K MT CO₂e reported for 2023, non-CO₂ gases are 0.4% , led by N₂O at 0.3% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.6%
- 12K MT
- CH₄
- 0.1%
- 17 MT
- N₂O
- 0.3%
- 33 MT
Emissions decline across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 12,029 |
| 2022 | 145,314 |
| 2021 | 150,635 |
| 2020 | 175,062 |
| 2019 | 169,349 |
| 2018 | 169,487 |
| 2017 | 189,508 |
| 2016 | 200,388 |
| 2015 | 214,093 |
| 2014 | 247,962 |
| 2013 | 252,575 |
| 2012 | 239,282 |
| 2011 | 241,097 |
Facility insight: PHILLIPS 66 SANTA MARIA REFINERY
PHILLIPS 66 SANTA MARIA REFINERY (ID 1006099) reported 12K MT CO₂e for 2023 in SAN LUIS OBISPO COUNTY, CA (#7,435 of 8,713 by latest CO₂e).
Across 2011–2023, annual CO₂e fell 95.0%; peak load was 253K MT in 2013. This facility has filed every year from 2011 to 2023, a complete 13-year record.
Peak year was 2013 at 253K MT CO2e; latest 2023 sits 95.2% below that peak (12K MT). The largest year-to-year move was 2022→2023 (-91.7%, 133K MT).
Frequently Asked Questions
Where does PHILLIPS 66 SANTA MARIA REFINERY rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, PHILLIPS 66 SANTA MARIA REFINERY ranks #7,435 of 8,713 reporting facilities by latest reported CO₂e, and #417 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 PHILLIPS 66 SANTA MARIA REFINERY? ▼
PHILLIPS 66 SANTA MARIA REFINERY's 12K MT CO₂e is higher than 1,278 of the 8,713 GHGRP facilities with reported emissions (15%), an exact count from the full corpus, not an estimate.
How much CO2 does PHILLIPS 66 SANTA MARIA REFINERY emit? ▼
PHILLIPS 66 SANTA MARIA REFINERY reported 12K MT CO2e in 2023.
What share of PHILLIPS 66 does PHILLIPS 66 SANTA MARIA REFINERY represent? ▼
PHILLIPS 66 SANTA MARIA REFINERY accounts for 0% of PHILLIPS 66's reported GHGRP CO₂e (12K MT of 24.6M MT), ranking #25 of 27 facilities under that parent.
What is PHILLIPS 66 SANTA MARIA REFINERY's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.4% of reported CO₂e at PHILLIPS 66 SANTA MARIA REFINERY, with N₂O the larger non-CO₂ share at 0.3% (CO₂ 99.6%). Shares use the facility's GHGRP gas components for that year.
Where does PHILLIPS 66 SANTA MARIA REFINERY rank inside Petroleum Product Suppliers? ▼
Among EPA GHGRP facilities tagged Petroleum Product Suppliers, PHILLIPS 66 SANTA MARIA REFINERY ranks #72 of 83 by latest reported CO₂e.
Is PHILLIPS 66 SANTA MARIA REFINERY reducing emissions? ▼
Over 13 reporting years (2011–2023), PHILLIPS 66 SANTA MARIA REFINERY's emissions have decreased by 95%. This suggests meaningful progress in emissions reduction.
Nationwide facilities with similar CO₂e or sector
Lower-footprint peers outside CA: nearest CO₂e totals and same-sector reporters for context.
Similar reported CO₂e
Nearest latest-year facility totals outside CA (12K MT here).
Similar Petroleum Product Suppliers CO₂e
Nearest same-sector facility totals outside CA.