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.
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
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
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 C06, Quincy, NOC Application
This is the notice of construction application for Microsoft Columbia's C06 expansion
https://ecology.wa.gov/20191206mscolumbianocappc06
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
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019wiegardtpretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019goosepretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019herroldpretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019northernpretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019rjpretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019taylorpretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019longislandpretreatplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019stationhousepretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019coastpretreatmentplan
2019 Pretreatment Plan
Document describing the plans of the Permittee for treating Z. japonica on their commercial clam beds this year.
https://ecology.wa.gov/2019heckespretreatmentplan
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