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Columbia River

Working Groups

EPA co-leads these public workgroups to help address toxic pollution in the Columbia River basin:

Columbia River

About EPA's Work in the Basin

The Columbia River is the fourth largest watershed in the nation, covering parts of seven states. Learn about the watershed and some of the EPA-supported efforts to help protect it.

Cold Water Refuges Project

EPA is helping protect and restore vital cold water habitat to support current and future salmon populations. Learn more about Columbia River Cold Water Refuges.

Chemicals of Emerging Concern

Pharmaceuticals, personal care products, and other chemicals in the environment can have significant impacts on human health and aquatic life. Learn about EPA's research and monitoring efforts regarding these so-called "chemicals of emerging concern" in the Columbia River.

Tribal Fish Consumption

Learn about EPA's work to help document tribal fish consumption rates and potential health risks from chemical pollution in certain species of fish.