Research & Data

Ecology provides the high-quality science that is microscope icon the foundation of Washington state environmental policy.

Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water.

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RCW Chapter 70.235

Limiting greenhouse gas emissions

RCW Chapter 80.80

Greenhouse gases emissions - baseload electric generation performance standard

WAC Chapter 173-442

Clean Air Rule

This report shows greenhouse gas emissions reported to us under the state mandatory reporting program.

The Washington Mandatory Greenhouse Gas Reporting Program - Reported Emissions for 2012 - 2016

0181009 GHG Reporting Schedule

2018 Greenhouse Gas Fee Reporting Schedule

A chart showing greenhouse gas emission reduction targets compared to a 1990 baseline.

HFC User Guide Short 20190901

This is the short (one-page) instructions about how to submit your completed HFC notification form using our online reporting system.

HFC User Guide Long 20190901

This is the longer instructions about how to submit your completed HFC notification form using our online reporting system.

2019 Greenhouse gas fee schedule

Greenhouse gas 2019 reporting fee and schedule

graph showing population, economy, greenhouse gas emissions from 2001 - 2017

2019 Calculator to determine greenhouse gas emissions from transportation fuel suppliers

This is the January 15, 2020 list of manufacturers that reported the status of their use of restricted hydrofluorocarbons (HFCs).

Public webinar presentation given 8-27-20

Public webinar presentation given 6-25-20

Public webinar presentation given 7-23-20

Meeting summary for 6-25-20 public rulemaking webinar

Meeting summary for 7-23-20 public rulemaking webinar

Meeting summary for 8-27-20 public rulemaking webinar

Information about air quality studies we conduct.

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