Welcome to the Assessment Total Maximum Daily Load (TMDL) Tracking and Implementation System (ATTAINS). State, Territory, Tribal and EPA staff enter water quality assessment decisions in ATTAINS.

This is the ATTAINS environment. The final data from Production ATTAINS are published in How’s My Waterway and through ATTAINS web services. For more information, visit https://www.epa.gov/waterdata/attains.

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Welcome to the Assessment Total Maximum Daily Load (TMDL) Tracking and Implementation System (ATTAINS).

This is the Demonstration (Demo) ATTAINS environment. This environment may be used for testing data, experimenting with new features, and for training.