Frequent Questions

How does water pollution affect aquatic animals?

EPA provides various resources to locate information on water pollution and how it has affected the animal populations living in these habitats:

EPA uses water quality and biological criteria to evaluate water quality and ecosystem health. The presence, condition and numbers of types of fish, insects, algae, plants, and other organisms provide important information about the health of aquatic ecosystems. The presence of toxics or other pollutants in water can affect aquatic life. Both types of criteria help scientists and regulators evaluate aquatic ecosystem health.

Wetlands are important features in the landscape that provide numerous beneficial services for people and for fish and wildlife. EPA has several resources that provide scientific and regulatory information about wetlands and wetland health:

EPA also provides information about healthy watersheds and the pollutants that can affect them. Watershed conditions are important to the people, plants, and animals that live within the watershed.

Consumers may be interested in information on contaminated fish and shellfish.

For information about Emergency Management and threats from Oil Spills, please visit EPA’s Emergency Response Web site:

If you have further questions, contact the Office of Wetlands, Oceans & Watersheds 

Other federal agencies also provide information about water quality and biological and ecosystem health. You may be interested in the following resources:



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