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.
Stakeholder meeting summary (WAC 173-460) 03/11/19
This is the meeting summary for the 3/11/19 stakeholder meeting for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.
https://ecology.wa.gov/stakeholder-meeting-summary-wac-173-460-03-11-19
Stakeholder meeting summary (WAC 173-460) 01/23/19
This is the revised meeting summary for the 1/23/19 stakeholder meeting for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.
https://ecology.wa.gov/stakeholder-meeting-summary-wac-173-460-01-23-19
Tier 1 Calculator for Biomethane Landfill (WAC 173-424) 11-28-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from landfills. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-landfill-wac-2
Stakeholder meeting summary (WAC 173-460) 08/20/18
This is the meeting summary for the 8/20/18 stakeholder meeting for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.
https://ecology.wa.gov/stakeholder-meeting-summary-wac-173-460-08-20-18
Technical memo about toxicity equivalence (TEQ) (WAC 173-460) 02/14/19
This is a 2/14/19 technical memo about toxicity equivalence (TEQ). It is related to rulemaking for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.
https://ecology.wa.gov/technical-memo-about-toxicity-equivalence-wac-173
Tier 1 Calculator for Biomethane Landfill (WAC 173-424) 07-15-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from landfills. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-landfill-wac-1
Tier 1 Calculator for Biomethane Landfill (WAC 173-424) 03/15/22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from landfills. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-landfill-wac-173
Tier 1 Calculator for Biomethane Manure (WAC 173-424) 11-28-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from dairy and swine manure. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-manure-wac-17-2
Tier 1 Calculator for Biomethane Manure (WAC 173-424) 07-15-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from dairy and swine manure. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-manure-wac-17-1
Tier 1 Calculator for Biomethane Manure (WAC 173-424) 03/15/22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from dairy and swine manure. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-manure-wac-173-42
Tier 1 Calculator for Biomethane Organic Waste (WAC 173-424) 11-28-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from organic waste. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-organic-waste-2
Tier 1 Calculator for Biomethane Organic Waste (WAC 173-424) 07-15-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from organic waste. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-organic-waste-1
Tier 1 Calculator for Biomethane Organic Waste (WAC 173-424) 03/15/22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from organic waste. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-organic-waste-wac
Tier 1 Calculator for Biomethane Sludge (WAC 173-424) 11-28-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from wastewater sludge. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-sludge-wac-17-2
Tier 1 Calculator for Biomethane Sludge (WAC 173-424) 07-15-22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from wastewater sludge. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-sludge-wac-17-1
Tier 1 Calculator for Biomethane Wastewater Sludge (WAC 173-424) 03/15/22
This is the (Tier 1) simplified calculator for conventionally-produced biomethane from wastewater sludge. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-biomethane-sludge-wac-173-42
Tier 1 Calculator for LNG (WAC 173-424) 11-28-22
This is the (Tier 1) simplified calculator for conventionally-produced liquid natural gas and liquid to compressed natural gas. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-lng-wac-173-424-11-28-22
Tier 1 Calculator for LNG (WAC 173-424) 07-15-22
This is the (Tier 1) simplified calculator for conventionally-produced liquid natural gas and liquid to compressed natural gas. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-lng-wac-173-424-07-15-22
Tier 1 Calculator for LNG (WAC 173-424) 03/15/22
This is the (Tier 1) simplified calculator for conventionally-produced liquid natural gas and liquid to compressed natural gas. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-lng-wac-173-424-03-15-22
Tier 1 Calculator for Renewable Diesel (WAC 173-424) 03/15/22
This is the (Tier 1) simplified calculator for conventionally-produced renewable diesel. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.
https://ecology.wa.gov/tier-1-calculator-for-renewable-diesel-wac-173-424
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