Iowa DNR
Iowa DNR

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Water Quality Assessments
Impaired Waters List

Unnamed Tributary to West Nishnabotna River IA 05-NSH-1939

mouth (T80N R38W Sec3 Shelby Co) to headwaters (T81N R38W Sec15 Shelby Co)

Details
Type
River
Segment ID
1939
Segment Size
5.75 Miles
10240002
HUC12
  • 102400020208
Legacy ADBCode
IA 05-NSH-0180_0
Designated Uses
  • Class A1 P
  • Class BWW1 P
Segment Memos 1
Prior to the 2008 IR cycle, this segment was classified only for general uses. Due to changes in Iowa’s surface water classification approved by U.S. EPA in 2008, this segment now has presumptive Class A1 primary contact recreation and Class BWW1 warmwater aquatic life designated uses. According to the Iowa Water Quality Standards, all perennial streams and all intermittent streams with perennial pools that are not specifically listed in the Iowa surface water classification are designated as Class A1 and Class BWW1 waters.
6/16/2020
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