EPA GHGRP · state profile · GU
Guam - lower-footprint state profile
According to the EPA's Greenhouse Gas Reporting Program (GHGRP), a smaller state total: 1.4M MT CO₂e across 10 reporting facilities in GU.
- among states
- #51
- Total CO₂e - Mid-size emitter
- 1.4M MT
- Facilities
- 10
- Companies
- 3
- Avg / facility - High intensity
- 138K MT
Data updated May 2026
Guam reports 1.4M MT CO₂e from 10 EPA GHGRP facilities and 3 parent companies (#51 of 54 U.S. states by aggregated facility CO₂e), led by GUAM POWER AUTHORITY at 836K MT (~61% of the state total).
- #51 of 54 states
- GUAM POWER AUTHORITY 60.7% of state
- 0.1% of U.S. GHGRP total
- Avg 138K MT per facility · May 2026
Top-reporter concentration desk
GUAM POWER AUTHORITY dominates the in-state book at 60.7% of reported Guam CO₂e (836K MT of 1.4M MT). Top-three reporters hold 94.7% (GUAM POWER AUTHORITY; OSAKA GAS ENERGY AMERICA; GUAM SOLID WASTE AUTHORITY). Shares use EPA GHGRP facilities sited in GU only, not each parent's company-wide total.
- Guam is 0.1% of the 2.57B MT U.S. GHGRP facility rollup across 54 jurisdictions.
- Leading EPA sector by CO₂e: Power Plants at 95.5% (1.3M MT across 9 facilities) - orthogonal to the facility-count sector mix below.
- Trails New Hampshire by 1.0M MT on the same state ranking.
- Leads U.S. Virgin Islands by 796K MT on the same state ranking.
Guam vs all states by reported GHGRP CO₂e
Where this state's aggregated facility Scope 1 sits among every state and territory in the EPA GHGRP file (readout in million MT)
1 51st of 54 higher than 3 of 54 states
States and territories, banded by total reported facility CO₂e (MT)
Each bar is a band; taller bars hold more states. 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 · May 2026
Facility mix · EPA sector count
How 10 Guam facilities split by EPA sector
Exclusive in-state facility counts by EPA industry_sector, orthogonal to the leading-parent CO₂e share lens above. Source: EPA GHGRP facility reports in Guam.
Facility mix · Scope 1 size bands
How 10 Guam facilities split by latest reported Scope 1
Exclusive in-state facility counts by latest reported Scope 1 size band, orthogonal to the EPA sector mix above. Source: EPA GHGRP facility reports in Guam.
Largest corporate emitters in Guam
Guam - top corporate emitters (MT CO₂e)
Company footprint
Which companies combine scale and emissions?
Each point is a leading Guam reporter. The crosshairs mark the median among the companies shown, so the chart distinguishes a larger facility footprint from a higher emissions total.
This is a comparison of the leading 3 reporters displayed above, not a measure of production, population, or total company-wide emissions outside Guam.
Read the chart values
- GUAM POWER AUTHORITY 7 sites · 836K MT
- OSAKA GAS ENERGY AMERICA 4 sites · 407K MT
- GUAM SOLID WASTE AUTHORITY 1 sites · 62K MT
State insight: Guam
Guam (GU) reports 1.4M MT CO₂e from 10 EPA GHGRP facilities operated by 3 companies (#51 of 54 states by aggregated facility CO₂e). Per-facility average is about 138K MT. Power Plants leads the in-state CO₂e mix at 95.5%.
Top in-state reporters: GUAM POWER AUTHORITY, OSAKA GAS ENERGY AMERICA, GUAM SOLID WASTE AUTHORITY (together 94.7% of the GU total). These are Scope 1 facility reports only - not a full state inventory or company-wide footprint. See methodology.
Top companies in Guam
Top facilities in Guam
Last reported: 1 of the 10 facilities above last reported to EPA before 2023. Their figure is from that older report, so it is ranked here against facilities with 2023 data. Each carries the marker, and its own page states the reporting year.
Nationwide peers for a lower-footprint state
Comparison paths for a smaller GHGRP state total: nearest CO₂e rollups and facility-count neighbors outside GU.
Similar reported CO₂e
Nearest states by aggregated facility CO₂e (1.4M MT here).
State totals aggregate EPA Greenhouse Gas Reporting Program (GHGRP) facility reports sited in Guam (GU). Figures reflect facility self-reporting, not a full state inventory. See our methodology. Retrieved and formatted by PlainCarbon
Related reading: Understanding corporate carbon reporting · All states · Methodology
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Greenhouse Gas Reporting Program (GHGRP). Consult a qualified professional before making decisions based on this data.