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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Revised Diesel Engine Exhaust Particulate Matter Health Risk Assessment Report Quincy, Washington

This report is a final health risk assessment (HRA) of diesel particles from some Quincy data centers.

https://ecology.wa.gov/20180806healthdieseldatacenter

VW state school bus grant awards

VW state school bus grant awards - text version

https://ecology.wa.gov/20181218schoolbusawardedgrants-alt

20181205 Request for info - Public ferries

Request for information for public ferry repower grants

https://ecology.wa.gov/20181205-requestforinfo

2018 School Bus Replacement Preliminary Application Criteria

A criteria supplement to the 2018 Clean School Bus Replacement Application.

https://ecology.wa.gov/2018schoolbusreplacementprelimappcriteria

2018 School Bus Replacement Preliminary Application

A preliminary application to apply for the VW state settlement grant for clean school bus replacement.

https://ecology.wa.gov/2018schoolbusreplacementprelimapplication

2018 Transit Bus Replacement Interest Form 2018

A preliminary application to apply for the VW state settlement grant for transit bus replacement.

https://ecology.wa.gov/2018transitbusreplacementinterestform2018

2019 Draft Acceptable Source Impact Levels (ASIL) Options (WAC 173-460) 02/14/19

This is a 2/14/19 spreadsheet of options to update the list of acceptable source impact levels (ASIL) in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/2019-draft-asil-options-wac-173-460-02-05-19

2019 Draft Labeling Options (WAC 173-443) 12/17/19

This is a 12/17/19 draft document about options for labeling products and equipment in Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/2019-draft-labeling-options-wac-173-443-12-17-19

2019 Draft ASIL SQER Deminimis Values (WAC 173-460) 03/04/19

This is a table of options to update the list of acceptable source impact levels (ASIL), small quantity emission rates (SQER), and de minimis emission values in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/2019-draft-asil-sqer-deminimis-values-wac-173-460

2019 draft ASIL, SQER, de minimis emission values (WAC 173-460) 01/17/19

This is a spreadsheet of options to update the list of acceptable source impact levels (ASIL), small quantity emission rates (SQER), and de minimis emission values in Chapter 173-460 WAC.

https://ecology.wa.gov/20190107-drafttable

Microsoft MWH Data Center 18AQ-E024 response to comments

This is the response to public comments report for the Microsoft MWH Data Center 18AQ-E024

https://ecology.wa.gov/20181024mwh_rtc

Vantage Data Centers agreed order 18AQ-E043 and tech support doc.

This is the September 2018 agreed order and technical support for Vantage Data Centers in Quincy.

https://ecology.wa.gov/20180910vantagedatacenter18aq-e043

Microsoft MWH Data Center Expansion Approval Order 18AQ-E024

This is the Microsoft MWH Data Center Expansion 03/04/05/06 Approval Order 18AQ-E024

https://ecology.wa.gov/20181023mwh_ao18aq-e024

2019 Draft ASIL Summary List (WAC 173-460) 03/07/19

This is the 3/7/19 draft summary list of Acceptable Source Impact Levels (ASIL) in Chapter 173-460 WAC.

https://ecology.wa.gov/2019-draft-asil-summary-list-wac-173-460-03-07-1

2019 Draft Acceptable Source Impact Levels (ASIL) Summary List (WAC 173-460) 02/15/19

This is the 2/15/19 draft summary list of Acceptable Source Impact Levels (ASIL) in Chapter 173-460 WAC.

https://ecology.wa.gov/2019-draft-asil-summary-list-wac-173-460-02-15-1

Microsoft MWH Technical Support Document

This is the technical support document for Microsoft MWH Data Center's 03/04/05/06 expansion.

https://ecology.wa.gov/20181023mwh_tsd

CyrusOne Data Center Second-Tier Health Impact Assessment

This is the second-tier health impact assessment report prepared by Landau Associates for CyrusOne Data Center.

https://ecology.wa.gov/20181226cyrusonehialandau

Microsoft MWH Data Center Expansion Tier 2 letter

This is the Microsoft MWH Data Center expansion Tier 2 toxics review letter.

https://ecology.wa.gov/20180717tier2ltr

Microsoft MWH Data Center Expansion HIA Recommendation

This is the Microsoft MWH Data Center expansion Health Impact Assessment recommendation document.

https://ecology.wa.gov/201807mwh_hiarecomm