Regulations & Permits

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

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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Table of ASIL, SQER, and de minimis emission values – WAC 173-460-150 (Effective 12-23-2019)

This is the 12/23/19 sortable table of toxic air pollutants (TAPs) listed in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/table-of-asil-sqer-and-de-minimis-emission-value

Creating a SAW account for Washington Emissions Inventory Reporting System (WEIRS)

Instructions for creating a SAW account for Washington Emissions Inventory Reporting System (WEIRS)

https://ecology.wa.gov/20190723creatingsawweirsaccount

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

VW Federal Funds For Ferry

Alternate text for the graphic showing VW federal funds are going towards retrofitting a diesel ferry to electric hybrid

https://ecology.wa.gov/20191022-vwfederalfundsforferry-alt

VW Settlement - Q & A EV charging infrastructure at workplaces grants

Electric Vehicle Charging Infrastructure at State and Local Government-Owned Facilities

https://ecology.wa.gov/20191003-workplace-charging-grants

2001 - 2017 GHG and GDP percentage changes

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

https://ecology.wa.gov/20191118ghggdp-alt

HFC User Guide, long version

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

https://ecology.wa.gov/hfc-user-guide-long-20190901

HFC User Guide, short version

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

https://ecology.wa.gov/hfc-user-guide-short-20190901

Washington's greenhouse gas emissions targets

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

https://ecology.wa.gov/20190729emissions-alt

2019-21 Capital Budget 4-Way Comparison April 2019

Ecology 2019-21 biennium capital budget proposals, 4-way comparison is (1) Governor’s errata, (2) to Senate committee, (3) to House floor, (4) to Compromise budget.

https://ecology.wa.gov/2019-21-capital-budget-comparison

CyrusOne Data Center Approval Order 19AQ-E052

This is the air quality approval order No. 19AQ-E052 for the CyrusOne Data Center in Quincy.

https://ecology.wa.gov/20191023cyrusoneao19aqe052

Oath Approval Order No. 19AQ-E048

This is the 2019 air quality approval order for Oath Holdings in Quincy.

https://ecology.wa.gov/20190730oath19aq-e048

Microsoft Columbia 2019 NOC Application

This is the 2019 air quality notice of construction application for Microsoft Columbia in Quincy

https://ecology.wa.gov/20191206microsoftcolumbianocapp

Microsoft Columbia C06, Quincy, Preliminary Determination

This is the preliminary determination for the Microsoft Columbia expansion, C06.

https://ecology.wa.gov/20191209mscolumbiapd

Microsoft Columbia, Quincy, draft Technical Support Document

This is the draft technical support document for Microsoft Columbia's expansion, C06, in Quincy.

https://ecology.wa.gov/20191209mscolumbiadrafttsd

Microsoft Columbia C06, Quincy, NOC Application

This is the notice of construction application for Microsoft Columbia's C06 expansion

https://ecology.wa.gov/20191206mscolumbianocappc06

Microsoft MWH Approval Order Modification

This is the air quality approval order modification for Microsoft MWH in Quincy.

https://ecology.wa.gov/20191126mwhaomod

Microsoft MWH Data Center Approval Order & TSD 19AQ-E031

This is the 2019 approval order and technical support document for Microsoft MWH Data Center.

https://ecology.wa.gov/20190926microsoftmwhaotsd19aqe031

Schweitzer Engineering Labs (SEL) Health Impact Assessment Recommenation

This is the health impact assessment recommendation for Schweitzer Engineering Labs (SEL) in Pullman.

https://ecology.wa.gov/20190805selhia

Microsoft MWH Preliminary Determination 19AQ-E031

This is the preliminary determination for the revision to Microsoft MWH Data Center's 2018 approval order.

https://ecology.wa.gov/201907mwhpd19aqe031