Washington Environmental Impact Statement regulations & environmental compliance analysis

Washington Environmental Impact Statement: What you need to know

Governing Law and Regulations

State Environmental Policy Act (SEPA): Revised Code of Washington (RCW) 43.21C.010 to 43.21C.914

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SEPA Rules: Washington Administrative Code (WAC) 197-11-010 to 197-11-990

SEPA process:

Lead agency: WAC 197-11-050

Categorical exemptions: WAC 197-11-305

Threshold determination: WAC 197-11-310 to 197-11-330

Environmental impact statement (EIS):

Type of EISs: WAC 197-11-405

Scoping: WAC 197-11-408

EIS format: WAC 197-11-425 to 197-11-435

EIS content: WAC 197-11-440

Comment period: WAC 197-11-500 to 197-11-570

Agency action: WAC 197-11-650 to 197-11-680

Stormwater permits: RCW 43.21C.0383

Regulatory Agency

Washington Department of Ecology (WDOE)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Washington has a State Environmental Policy Act (SEPA) that is similar to the National Environmental Policy Act (NEPA). SEPA requires the preparation of an environmental impact statement (EIS) whenever a governmental action may significantly affect the quality of the environment. SEPA gives agencies the ability to condition or deny a proposal due to identified likely significant adverse impacts. Washington's EIS requirements are similar to the federal rules, although the Washington Department of Ecology (WDOE) requires that all SEPA documents be submitted in electronic format through e-mail or on computer disc. See the national section ENVIRONMENTAL IMPACT STATEMENT for more information on NEPA requirements.

Administration and enforcement. All required EISs should be submitted to the WDOE, or the appropriate lead agency (usually a local town or county board) for review and distribution.


Read more about Environmental Impact Statement

More on this topic:

Governing Law and Regulations
Regulatory Agency
Comparison: State vs. Federal
State Requirements
Additional Guidance
Guidance Document

Washington Environmental Impact Statement Resources

Type Title
Checklists Environmental Impact Statement Checklist
Forms Short Environmental Assessment Form
See all Environmental Impact Statement Resources