If the effluent limitations are insufficient for a water body, that water body is considered to be "water quality limited," requiring more stringent controls called total maximum daily loads (TMDLs).

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This statement is true. When effluent limitations are not enough to meet water quality standards, the water body is considered impaired or "water quality limited," and TMDLs are implemented to reduce pollutants and improve water quality.

If the Effluent Limitations Are Insufficient for a Water Body