Research & Data

Ecology provides the high-quality science that is microscope icon 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.

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WAC Chapter 173-422A

Motor vehicle emission inspection

RCW Chapter 19.112

Motor fuel quality act

WAC Chapter 173-400

General regulations for air pollution sources

RCW Chapter 52.12

Powers, Burning Permits

RCW Chapter 70.94

Washington clean air act

RCW Chapter 80.70

Carbon dioxide mitigation

Air Quality Burn Permitting System

(SAW account required)

WAC Chapter 173-401

Operating permit regulation

WAC Chapter 173-405

Kraft pulping mills

WAC Chapter 173-406

Acid rain regulation

WAC Chapter 173-407

Carbon dioxide mitigation program

WAC Chapter 173-410

Sulfite pulping mills

WAC Chapter 173-415

Primary aluminum plants

WAC Chapter 173-420

Conformity of transportation activities to air quality implementation plans

WAC Chapter 173-421

Motor vehicle emission control systems

WAC Chapter 173-422

Motor vehicle emission inspection

WAC Chapter 173-423

Low emission vehicles

WAC Chapter 173-425

Outdoor burning

WAC Chapter 173-430

Agricultural burning

WAC Chapter 173-433

Solid fuel burning devices

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