Fig. 9
Results of flagging procedure for volume data in the United States Water Withdrawal Database (USWWD) by state. Panel (a) shows the percentage of reported withdrawal volumes - including both monthly and annual values - classified as Anomalous (blue), Not Anomalous (green), and Unspecified (grey, insufficient data for classification) in USWWD. Panel (b) shows the percentage of annual withdrawal volumes classified as Exceeds (blue, exceeds USGS maximum value), Does not Exceed (green, under USGS maximum value), and Unspecified (grey, insufficient data for comparison). Zero values were classified as Unspecified. Null values were not considered in the volume flagging procedure. States are arranged in descending order based on the percentage of anomalous volumes from top to bottom in panel (a). The percentage values displayed on each bar segment represent the proportion of volumes in each category relative to the total for that state. Past Florida in panel (a), the percentages of Anomalous volumes are not shown because they are less than one percent.
