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.

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Prior years point source emissions data

This spreadsheet shows emissions from facilities and other point sources from 2009 forward.

https://ecology.wa.gov/prior-years-point-source-emissions

Oil spill prevention recommendations

Specific recommendations made to parties involved in oil spills

https://ecology.wa.gov/prevention-recommendations

Previous Water Treatment Plant General Permit 2009

This is the previous Water Treatment Plant General Permit from 2009.

https://ecology.wa.gov/previous-water-treatment-plant-general-permit-2009

Previous Water Treatment Plant General Permit Fact Sheet 2009

This is the previous Water Treatment Plant General Permit fact sheet from 2009.

https://ecology.wa.gov/previous-water-treatment-plant-general-permit-2014

Presentation slides (WAC 173-323) 8/7/17

August 7, 2017 Presentation slides for Chapter 173-323 rulemaking.

https://ecology.wa.gov/presentation-slides-wac-173-323

Primary Requirements to Grow and Harvest Shellfish September 2014

Table of primary requirements to grow and harvest shellfish in Washington State

https://ecology.wa.gov/primary-requirements-to-grow-and-harvest-shellfish

Presentation (WAC 173-455) 06-08-22

This is a presentation for the 6/8/22 stakeholder meeting for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/presentation-wac-173-455-06-08-22

Presentation (WAC 173-455) 05-18-22

This is a presentation for the 5/18/22 stakeholder meeting for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/presentation-wac-173-455-05-18-22

Presentation slides (WAC 173-455; WAC 173-400) 03/21/17

This is a powerpoint presentation for a meeting on 3/21/17 for WAC 173-455 Air Quality Fee Rule; WAC 173-400 General Regulations for Air Pollution Sources.

https://ecology.wa.gov/presentation-slides-wac-173-455;-wac-173-400-03

Presentation (WAC 173-460) 08/20/18

This is a presentation for the 8/20/18 stakeholder meeting for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/presentation-wac-173-460-08-20-18

Presentation about criteria air pollutants as toxic air pollutants (WAC 173-460) 11/16/18

This is a presentation for the 11/16/18 stakeholder meeting about criteria air pollutants as toxic air pollutants. It is related to rulemaking for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/presentation-about-criteria-air-pollutants-as-toxi

Presentation about dimethyl mercury inhalation risk screening concentration (WAC 173-460) 10/10/18

This is a presentation for the 10/10/18 stakeholder meeting about dimethyl mercury inhalation risk screening concentration. It is related to rulemaking for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/presentation-about-dimethyl-mercury-inhalation-ris

Presentation about small quantity emission rates-de minimis emission values (WAC 173-460) 01/23/19

This is a presentation for the 1/23/19 stakeholder meeting about small quantity emission rates (SQER) and de miminis emission values. It is related to rulemaking for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/presentation-about-small-quantity-emission-rates-d

Presentation about toxicity equivalence and early life adjustment factors (WAC 173-460) 10/10/18

This is a presentation for the 10/10/18 stakeholder meeting about toxicity equivalence (TEQ) and early life adjustment factors. It is related to rulemaking for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/presentation-about-toxicity-equivalence-and-early

10-12-2016 PRO-C Meeting agenda and summary

This is the meeting agenda and summary for the pooled resources oversight committee of the Stormwater Work Group from 10-12-2016.

https://ecology.wa.gov/pro-cagenda101216

1-26-2016 PRO-C Meeting agenda and summary

This is the meeting agenda and summary for the pooled resources oversight committee of the Stormwater Work Group from 1-26-2016.

https://ecology.wa.gov/pro-cagenda12616

5-5-2016 PRO-C Meeting agenda and summary

This is the meeting agenda and summary for the pooled resources oversight committee of the Stormwater Work Group from 5-5-2016.

https://ecology.wa.gov/pro-cagenda5516

Eastern WA Workshop and Hearing Presentation

Presentation slides for the workshop on the formal draft Eastern WA Phase II Municipal Stormwater General Permit

https://ecology.wa.gov/presentation-slides-for-eastern-wa

Formal draft Western WA permits workshops and public hearings presentation

Presentation slides for the workshop on the formal draft Western Washington Municipal Stormwater general permits

https://ecology.wa.gov/presentation-slides-for-western-wa

Workshop Presentation for Cannabis Lab Accreditation Rulemaking

Workshop slides from November and December 2023 meeting on updated preliminary draft rule language

https://ecology.wa.gov/presentation-cannabis-lab-accreditation