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Columbia River

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 Columbia River watershed and key projects that are helping to protect it.

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.

Cold Water Refuges for Salmon

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

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 "chemicals of emerging concern" in the Columbia River.

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