About EPA
EPA Region 10 (Pacific Northwest)
Alaska, Idaho, Oregon, Washington and 271 Native Tribes
Serving Alaska, Idaho, Oregon, Washington, and 271 Native Tribes.
Key Issues
- Flooding recovery and response
- Bristol Bay
- Cleanup Sites
- Columbia River
- Puget Sound
- Tribal Programs
- West Coast Diesel Collaborative
- A-Z Index of all Region 10 topics
Region 10 News & Events
Events
Activities
- EPA approved revisions to the human health criteria for toxics in Oregon's water quality standards. Learn more about the new standards.
- We're conducting a watershed assessment to understand how mining and other large-scale development would affect water quality and habitat in the Bristol Bay watershed, home to one of the largest salmon populations in the world. Learn more about our work in Bristol Bay