Toxics Release Inventory (TRI) reports are required under the Emergency Planning and Community Right-to-Know Act (EPCRA). TRI provides annual data about chemical releases and pollution prevention ...

Our most frequently requested information: ...

Nonpoint water pollution is a leading threat to the health of rivers, lakes, wetlands, and marine water across the state. But what is nonpoint pollution? Nonpoint source pollution refers to the kind ...

We have new requirements under the federal Energy Policy Act to develop an underground storage tank (UST) operator training program. We revised the state’s UST rule (Chapter 173-360A WAC) to include ...

We update the surface water quality standards to incorporate the latest science and to meet our priorities and commitments regarding the standards. We use the rulemaking process to meet our priorities ...

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