Washington State Greenhouse Gas Emissions from Large Emitters, 2012-2022

Washington's largest emitters, those releasing 10,000 metric tons of CO2 equivalent or more annually, have reported their greenhouse gas emissions to the state's Department of Ecology since 2012. This dataset accounts for the majority of the state's emissions and includes a subset of emissions covered by the Climate Commitment Act. The data is reported by facilities, fuel suppliers, natural gas suppliers, and electric power entities across multiple sectors.

Use Cases

• Analyzing emissions trends by Sector and Subsector using the Year and Reported Emissions (MTCO2e) columns.
• Mapping emission sources by County or Congressional Districts using the Georeferenced Location column.
• Comparing total Reported Emissions (MTCO2e) against Covered Emissions (MT CO2e) to assess regulatory impact under the CCA Status column.
• Profiling emitter types and their parent organizations using the Reporter Type, Parent Company, and Primary NAICS Code columns.

Strengths

• Data collection began in 2012, providing a multi-year time series for trend analysis.
• Includes granular breakdowns of emissions by gas type, such as Carbon Dioxide (MTCO2e), Methane (MTCO2e), and HFCs (MTCO2e).
• Covers the majority of Washington State's total greenhouse gas emissions as of 2022.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Emissions from biogenic fuels and certain sectors are exempt, which may create gaps for specific analyses.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Washington State Department of Ecology

Collection Method

Mandatory reporting by large emitters (facilities, fuel suppliers, natural gas suppliers, electric power entities) under WAC 173-441 and WAC 173-446.

Time Range

2012 to present (with some sectors back-reported to 2015).

Freshness

Last updated 2026-04-24 15:32:08; freshness should be verified.

Geography

Washington State, United States, with columns for County, City, and Congressional Districts.