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Current Water Quality Standards

Standards Adopted With Delayed Effective Date

Regulation #32 - Classifications and Numeric Standards for Arkansas River Basin (amended 1/14/13, effective 6/30/13)

Regulation #33 - Classifications and Numeric Standards for Upper Colorado River Basin and North Platte River (Planning Region 12) (amended 1/14/13, effective 6/30/13)

Regulation #35 - Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (amended 1/14/13, effective 6/30/13)

Regulation #36 - Classification and Numeric Standards for Rio Grande River Basin (amended 1/14/13, effective 6/30/13)

Regulation #37 - Classifications and Numeric Standards for Lower Colorado River Basin (amended 1/14/13, effective 6/30/13)

Regulation #38 - Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin (amended 1/14/13, effective 6/30/13)

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