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Impaired Waters and TMDLs

Impaired Waters and TMDLs in Region 10

EPA Region 10 serves Alaska, Idaho, Oregon, Washington and 271 native tribes.

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Find TMDLs (Total Maximum Daily Load) and Impaired Waters

Search our Assessment and TMDL Tracking and Implementation System (ATTAINS) for TMDLs and impaired waters in Region 10.


State Impaired Waters Programs

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State TMDL Programs

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