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Federal
Water Quality attainment Information from Clean Water Act Statewide Statistical Surveys
U.S. Environmental Protection Agency —
Designated uses assessed by statewide statistical surveys and their state and national attainment categories. Statewide statistical surveys are water quality... -
Federal
Wadeable Streams Assessment Data
U.S. Environmental Protection Agency —
The Wadeable Streams Assessment (WSA) is a first-ever statistically-valid survey of the biological condition of small streams throughout the U.S. EPA worked with the...