Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Rock River IA 06-BSR-1534

mouth (S1, T95N, R48W, Sioux Co.) to confluence with Little Rock R. in S35, T98N, R46W, Lyon Co.

Assessments
2016 Final
Legacy Assessments
2014 Final
2012 Final
2010 Final
2008 Final
2006 Final
2004 Final
2003 Final
2002 Final
2000 Final
1998 Final
1996 Final
1994 Final
1992 Final
Details
Waterbody Type Segment ID Segment Size HUC8
River 1534 26.9 Miles 10170204
Legacy ADBCode:
IA 06-BSR-0030_0
Notes:
Prior to the 2008 Section 305(b) cycle, this river segment was designated only for Class B(WW1) aquatic life uses, including fish consumption uses. Due to changes in Iowa’s surface water classification that were approved by U.S. EPA in February 2008, and the results of an Use Attainability Analysis, this segment is also now designated for Class A1 (primary contact recreation) uses. This segment remains designated for warmwater aquatic life use (now termed Class B(WW1) uses), and for fish consumption uses (now termed Class HH (human health/fish consumption uses).
Use Designations
  • Class A1 Recreation : Primary contact
  • Class B(WW-1) Aquatic Life : Warm Water Type 1
  • Class HH Human Health :
Map
Water Monitoring Network
Fish Kills
BioNet Monitoring Sites
AQuIA Monitoring Sites