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.

See more about this collection...

VW state settlement allocations

A pie chart showing how the VW state settlement funds are being used.

https://ecology.wa.gov/20200408-vwallocationscircle-alt

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

Minor source baseline dates by county

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

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

How can I protect my health at different AQI values

A color coded chart with numerical values telling what actions to take to protect your health during an air quality event.

https://ecology.wa.gov/2019aqigraphic-alt

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

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

NOx reductions alt text document

Arrow showing past & current NOx reductions in comparison to our goal and future reductions using VW settlement funds

https://ecology.wa.gov/20200407-noxreductionsarrow-alt

TransAlta Best Available Retrofit Technology (BART) order, revised, 12/13/11

This is the first revised TransAlta Best Available Retrofit Technology (BART) order, 12/13/11.

https://ecology.wa.gov/transaltarevisedbartco12-13-11

Spokane County's Second 10-Year Limited Maintenance Plan for Carbon Monoxide

State Implementation Plan Revision for Spokane County Second 10-Year Limited Maintenance Plan for Carbon Monoxide

https://ecology.wa.gov/spokaneco

Spokane County's Second 10‐Year Limited Maintenance Plan for Particulate Matter (PM10)Spokane County, Washington Second 10-Year Limited Maintenance Plan for PM10

State Implementation Plan Revision for Spokane County Second 10-Year Limited Maintenance Plan for PM10

https://ecology.wa.gov/spokanepm10second10lmp

TransAlta Best Available Retrofit Technology (BART) order, 6/18/10

This is the TransAlta Best Available Retrofit Technology (BART) order, 6/18/10.

https://ecology.wa.gov/tasignedbartorder

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

Questions and Answers - Electric vehicle charging infrastructure along high-traffic corridors

Information on grant opportunities to add electric vehicle charging infrastructure on major transportation corridors in Washington.

https://ecology.wa.gov/20200107-vwfederalcorridorfaq

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

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

May 25, 2010 TransAlta agreement

This is the May 25, 2010 agreement between Ecology and TransAlta for the TransAlta power plant.

https://ecology.wa.gov/transaltasignedagreement

Washington Emissions Inventory Reporting System (WEIRS) Add New Emissions form

form to add new emissions in Washington Emissions Inventory Reporting System (WEIRS)

https://ecology.wa.gov/addnewemissions

Benton Clean Air Agency General Air Quality Rules

Including Benton Clean Air Agency rules into the State Implementation Plan

https://ecology.wa.gov/bentoncombinedfilessubmittal

State Implementation Plan Revision: Updates to Spokane Regional Clean Air Agency Regulations

State Implementation Plan Revision Updates to Spokane Regional Clean Air Agency Solid Fuel Burning Devices Rule (Regulation I - Article VIII)

https://ecology.wa.gov/finalsipspokane2015