Research & Data

Use this portal to filter and search for all of our scientific information.

Ecology provides the high-quality science that is 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. We provide access to that data through reports, databases, maps and user-friendly online tools.

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2011 comprehensive emissions inventory three-year summary

This is a spreadsheet of the 2011 comprehensive three-year emissions inventory.

https://ecology.wa.gov/2011-comprehensive-emissions-inventory-summary

2011 County Emissions Inventory Technical Documentation

This document describes the methods and data sources used to estimate emissions for base year 2011.

https://ecology.wa.gov/201410countyemissionsinventory2011

2020 SO2 attainment recommendation for Chelan and Douglas counties

Ecology's recommendation to EPA that the agency find Chelan and Douglas counties to be in attainment for sulfur dioxide air pollution.

https://ecology.wa.gov/20200716-ecologyso2attainmentrecommendationdouglas

Yakima Air Wintertime Nitrate Study

A study about high nitrate levels in Yakima's winter air.

https://ecology.wa.gov/yakimaairwinterstudyreport

Minor source baseline dates by county

This is a spreadsheet of minor sources with baseline dates by county.

https://ecology.wa.gov/201502minorsourcebaselinecounty

2011 Comprehensive Emissions Inventory Categories Reference

This reference document summarizes the methods used to prepare the Washington 2011 County Emissions Inventory.

https://ecology.wa.gov/2011-comprehensive-emissions-inventory-categories

Cap-and-Invest Linkage Survey Questions

This is a pdf of a survey being distributed by Ecology to get public input on linking Washington's carbon market with markets in other jurisdictions

https://ecology.wa.gov/202303cap-and-investlinkagesurveyquestions

2011 point source emissions annual summary

This is a spreadsheet of the annual summary of 2011 point source emissions.

https://ecology.wa.gov/2011-point-source-emissions-summary

Washington Emissions Inventory Reporting System (WEIRS) Emissions Inventory Codes

Emissions Inventory Codes for Washington Emissions Inventory Reporting System (WEIRS), 12/20/19

https://ecology.wa.gov/20191220emissionsinventorycodes

Baseline modeling inventory for Prevention of Significant Deterioration-permitted facilities

This is a spreadsheet of the baseline modeling emissions inventory for Prevention of Significant Deterioration-permitted facilities.

https://ecology.wa.gov/201603prevsignificantdeteriorationbaseline

2014 emissions inventory for Prevention of Significant Deterioration-permitted facilities

This is the spreadsheet of 2014 emissions inventory for facilities with a Prevention of Significant Deterioration permit.

https://ecology.wa.gov/201603prevsignificantdeteriorationinventory

Input data for modeling emissions inventory for Prevention of Significant Deterioration-permitted facilities

This is a spreadsheet of the input data for modeling emissions inventory for Prevention of Significant Deterioration-permitted facilities.

https://ecology.wa.gov/201603prevsignificantdeteriorationsupp

Prevention of Significant Deterioration baseline emissions inventory technical support

This is the technical support document for the baseline emissions inventory for facilities with a Prevention of Significant Deterioration permit.

https://ecology.wa.gov/201603prevofsignificantdeteriorationtechsupport

Prior years point source emissions data

This spreadsheet shows emissions from facilities and other point sources from 2009 forward.

https://ecology.wa.gov/prior-years-point-source-emissions

2015 changes to 2009 vapor intrusion toxicity values and screening levels

2015 Excel spreadsheet of changes to the 2009 vapor intrusion toxicity values and screening levels.

https://ecology.wa.gov/2015vaporintrusionupdates

CO2 Removal Projects Standards Analysis - SCS Global Services

This independent report was commissioned by the Washington Legislature in 2021 to examine the potential for carbon removal projects in Washington.

https://ecology.wa.gov/20230726scsglobalreportcarbonsequestration

2023 State Agency Fuel Use Greenhouse Gas Reporting Tool

Excel sheet containing fuel use data from state agencies for 2023.

https://ecology.wa.gov/2023stateagencyfueluse-ghgreportingtool

Presentation (WAC 173-400; WAC 173-401) 4-18-24

This is a presentation for the April 18, 2024 stakeholder meeting for Chapter 173-400 WAC, General Regulations for Air Pollution Sources and Chapter 173-401 WAC, Operating Permit Regulation.

https://ecology.wa.gov/presentation-wac-173-400;-wac-173-401-4-18-24

Grant Application for Air Quality in Overburdened Communities Grant: Frequently Asked Questions, October 15, 2024

This is the October 15, 2024 frequently asked questions (FAQ) about the grant application for Air Quality in Overburdened Communities Grant.

https://ecology.wa.gov/20241015overburdenedfaq

GIS Data

Ecology's authoritative GIS data layers are available for download.

https://ecology.wa.gov/research-data/data-resources/geographic-information-systems-gis/data