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61-65 66-70 71-75 76-80 81-85 86-90 91-95 Year (July-September)

Figure 3-37 Time series from 1961-1995 of tenth percentile dissolved oxygen for Big Sioux River: (a) RF1 reach 10170203039, and (b) RF1 reach 10170203042. Source: USEPA STORET.

61-65 66-70 71-75 76-80 81-85 86-90 91-95 Year (July-September)

Figure 3-37 Time series from 1961-1995 of tenth percentile dissolved oxygen for Big Sioux River: (a) RF1 reach 10170203039, and (b) RF1 reach 10170203042. Source: USEPA STORET.

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