Slide deck from outreach event about the draft legislative report on the accreditation of cannabis laboratories.

This is a preliminary draft of the rule that stakeholders were asked to comment on

A list of approved third party verifiers and verification bodies in Washington's Greenhouse Gas Reporting Program.

Flood Control Assistance Account Program (FCAAP)2023-2025 Grant Application Workshop slideshow

The Department of Ecology issued this Administrative Order (Order) requiring Department of Energy-Richland Operations Office and CH2M HILL Plateau Remediation Company to comply with WA codes and the Hanford RCRA permit.

This is the withdrawn rulemaking announcement (CR 101) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

This is the Washington Adminstration Code that governs how we certify operators. It also shows how plants are classified at the end of the document.

This document identifies changes to the current rule, WAC 173-360, Underground Storage Tank (UST) Regulations, that are included in WAC 173-360A.

This document tracks changes between the preliminary draft of WAC 173-360A and the proposed rule of WAC 173-360A, Underground Storage Tank (UST) Regulations.

Watershed Management Plan Water Resource Inventory Area 55 - Little Spokane River & Water Resource Inventory Area 57 - Middle Spokane River, Prepared by: Spokane County regarding rulemaking for WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

Withdrawal Notice for 173-55, Accreditation of Cannabis Laboratories

Climate Resilience Strategy Summary in Vietnamese

We review projects needing federal approval to assure compliance with state water quality standards.

Get Underground Injection Control (UIC) well registration requirements and information.

This is the rulemaking page for Chapter 173-443 WAC, Greenhouse Gas Assessment for Projects.

This is the rulemaking page for Chapter 173-55 WAC.

Policies, procedures & guidance guide our water right and dam safety work

Information from Ecology and WDFW about mineral prospecting and placer mining, and ESHB 1261.

We regulate discharge of injection well fluids to protect against groundwater contamination.

We manage SEPA and related rules and provide background about rulemaking.