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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Technical Support Document - Gas-Powered Emergency Generators

Technical support document for general order for gas-powered emergency electrical generators

https://ecology.wa.gov/gasemergencygeneratortsd

General Order - Perchloroethylene Dry Cleaners

General order for perchloroethylene dry cleaners using less than 2100 gallons per year

https://ecology.wa.gov/finaldry_cleaners_order

General Order - Gas-Powered Emergency Electrical Generators

General order for gas-powered emergency electrical generators

https://ecology.wa.gov/finalgas_firedgenerators_order

General Order - Auto Body Shops

General order for auto body repair and refinishing shops

https://ecology.wa.gov/genorderbodyshops

General Order - Small Water Heaters and Steam-Generating Boilers

General order for small water heaters and steam-generating boilers

https://ecology.wa.gov/smallboilerpropanediesel

Technical Support Document - Auto Body Shops

Technical support document for general order for auto body repair and refinishing shops

https://ecology.wa.gov/autobodytsd

General Order - Asphalt Plants

Amended general order for portable and stationary asphalt plants

https://ecology.wa.gov/10aq-go-01_amendment_1

Technical Support Document - Asphalt Plants

Technical support document for general order for portable and stationary asphalt plants

https://ecology.wa.gov/final_asphalt_plant_tsd

Technical Support Document (Amended) - Asphalt Plants

Amended technical support document for general order for portable and stationary asphalt plants

https://ecology.wa.gov/20110418asphaltplantstechsupport

General Order - Portable and Stationary Concrete Batch Plants

General order for portable and stationary concrete batch plants

https://ecology.wa.gov/signed_go_11aq-go-02_concrete_batch_plants

Technical Support Document - Concrete Batch Plants

Technical support document for portable and stationary concrete batch plants

https://ecology.wa.gov/portable-stationaryconcretebatchplantstsd

General Order - Portable and Stationary Rock Crushers

General order for portable and stationary rock crushers

https://ecology.wa.gov/signed_go_11aq-go-001_rock_crusher

Technical Support Document - Rock Crushers

Technical support document for general order for stationary and portable rock crushers

https://ecology.wa.gov/finaltsdstationary-portablerockcrushing

Technical Support Document - Dairy Manure Anaerobic Digesters

Technical support document for general order for dairy manure anaerobic digesters

https://ecology.wa.gov/final_tsd_12aq-go-01_digesters

General Order - Dairy Manure Anaerobic Digesters

General order for dairy manure anaerobic digesters

https://ecology.wa.gov/signed_12aq-go-01_digester

Bridge Point Tacoma – Settlement Agreement

Legal document for the agreement with Bridge Point Tacoma to help reduce air quality impacts from the South Tacoma warehouse project.

https://ecology.wa.gov/bridge-point-tacoma-settlement-agreement

H5 Data Center notice of construction (NOC) permit

This is the 2022 air quality notice of construction permit (approval order) for H5 Data Center.

https://ecology.wa.gov/20220309h5nocpermit

H5 Data Center Preliminary Determination

This is the draft preliminary determination for H5 Data Center

https://ecology.wa.gov/20211110h5draftpreldet

H5 Data Center Notice of Construction Application

This is the notice of construction application for H5 Data Center

https://ecology.wa.gov/20211110h5nocapp

H5 Data Center Health Impact Assessment Report

This is the Health Impact Assessment Report for H5 Data Center

https://ecology.wa.gov/20211110h5healthimpactassessment