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Clean Water Act Section 303(d): Impaired Waters and Total Maximum Daily Loads (TMDLs)

Clean Water Act Section 303(d): Impaired Waters and Total Maximum Daily Loads (TMDLs)

EPA's 303(d) Program assists states, territories and authorized tribes in submitting lists of impaired waters and developing TMDLs. A TMDL establishes the maximum amount of a pollutant allowed in a waterbody and serves as the starting point or planning tool for restoring water quality.