Little Sioux River IA 06-LSR-1573
from confluence with Willow Cr. (S17 T94N R36W Clay Co.) to east corporate limit of Spencer at west line of S17 T96N R36W Clay Co.
- Cycle
- 2022
- Release Status
- Final
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Stable
- Created
- 12/30/2021 11:19:52 AM
- Updated
- 1/14/2022 11:18:58 AM
The Class A1 use was assessed as "not supported" due to levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class BWW1 use was assessed as "WINOFI" based on biological sampling data. The Class HH (fish consumption) use was assessed as "fully supported" based on fish tissue sampling data.
Data
Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2012-2014 10210003 Little Sioux River DS of Spencer (DS1) Iowa DNR 6 BIO See Below 924 Little Sioux River Spencer – DS1 Iowa DNR 6 BIO See Below 481 Little Sioux River Spencer – REMAP #129 Iowa DNR 6 FT See Below 183 Little Sioux River At Gillet Grove Site ID Data Source ID # Samples / # Years 2012 Geometric Mean 2013 Geometric Mean 2014 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 10210003 6 22 / 3 1181 1805 895 Yes 19 86% Yes Evaluated Not Site ID Data Source ID # Samples / # Years Maximum Value Mean Value Median Value # Violations % Violations Significantly >10% Violations Assessment Type Support Level 10210003 6 32 / 3 8.7 8.13 8.2 0 0% No Evaluated Full Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations % Acute/ Chronic Violations Significantly >10% Violations Assessment Type Support Level 10210003 6 Ammonia 32 / 3 1.3 0.15 0.05 0 / 0 0% / 0% No Evaluated Full 10210003 6 Chloride 33 / 3 57 33.3 32 0 / 0 0% / 0% No Evaluated Full 10210003 6 Dissolved oxygen 33 / 3 16.5 11.1 10.6 NA / 0 NA / 0% No Evaluated Full 10210003 6 pH 32 / 3 8.7 8.13 8.2 0 / NA 0% / NA No Evaluated Full 10210003 6 Sulfate 33 / 3 180 101 100 0 / NA 0% / NA No Evaluated Full 10210003 6 Temperature 33 / 3 27.3 11.7 11.6 0 / 0 0% / 0% No Evaluated Full Benthic
Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal BM Sample Gear BMIBI score BMIBI Class 47a BMIBI BIT BMIBI Pass/Fail 924 9/8/14 1104 47a MO/WW ArtSub 38 Fair 54 Fail 924 10/8/13 1104 47a MO/WW ArtSub 44 Fair 54 Fail BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal Riffle Stream? FIBI score FIBI Class 47a FIBI BIT FIBI Pass/ Fail 481 9/6/05 1109 47a MO/WW NA 33 Fair 43 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Evaluated Fail (0/2) Not Fish Evaluated Fail (0/1) Not Assessment
was evaluated because the drainage areas Overall Evaluated Fail WINOFI 3bu of
the sites were greater than the calibrated range. Site ID Biopart Year Species # in sample / # of samples Avg Length (cm) (Avg) Hg (ppm) Chlordane (ppm) Sum PCBs (ppm) 183 fillet 2011 channel catfish 3 47.6 0.115 0.03 0.09 183 tissue plug 2011 largemouth bass 5 41.0 0.289
183 tissue plug 2015 walleye 5 37.5 0.174
Support Level Full
Class A1 - Indicator Bacteria:
Class A1 - pH:
Class BWW1 - Conventional Parameters:
Class BWW1 - Biological Sampling:
Fish:
Overall:
Class HH - Fish Tissue Sampling: