Raccoon River IA 04-RAC-1117
from the Polk/Dallas county line to confluence of North Raccoon and South Raccoon rivers in Dallas Co.
- Cycle
- 2022
- Release Status
- Final
- Overall IR
- 4 - Water is impaired or threatened and a TMDL has been completed or is not needed.
- Trend
- Unknown
- Created
- 12/28/2021 11:24:46 AM
- Updated
- 12/28/2021 11:30:46 AM
The Class A1use was assessed as "not supported" based on levels indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW1 use was assessed as "fully supported" based on water quality monitoring data and biological sampling data. The Class C (drinking water) use was assessed as "not supported" due to levels of nitrate that exceeded state water quality standards. The Class HH use was assessed as "fully supported" based on fish tissue sampling data and water quality monitoring data. Note: A TMDL for nitrate and pathogen indicators (E. coli) was prepared by DNR and approved by EPA in June 2008. Because this TMDL covered the primary Section 303(d) impairments identified for the 2006 assessment/listing cycle, this waterbody was moved from IR Category 5a from the 2006 assessment/listing cycle to IR Category 4a (impaired; TMDL approved) for the 2008 cycle. This river segment remains in IR Category 4a for the current cycle.
Data
Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description USACE 12 WQ CY 2016-2017 17250001 Raccoon River at R16 Iowa DNR 6 BIO See Below 846 Raccoon River Upstream of Des Moines Iowa DNR 6 BIO See Below 1093 Raccoon River Booneville – RA001 Iowa DNR 6 FT See Below 198 Raccoon River At Booneville Access Class
A1 - Indicator Bacteria: Site ID Data Source ID # Samples / # Years 2016 Geometric Mean 2017 Geometric Mean 2018 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 17250001 12 23 / 2 261.32 275.54 NA Yes 13 57% Yes Monitored Not Class
A - pH: Site ID Data Source ID # Samples / # Years Maximum Value Mean Value Median Value # Violations % Violations Significantly >10% Violations Assessment Type Support Level 17250001 12 39 / 2 8.745 8.31 8.31 0 0% No Monitored Full Class
BWW1 - Conventional Parameters: 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 17250001 12 Ammonia 39 / 2 0.28 0.04 0.02 0 / 0 0% / 0% No Monitored Full 17250001 12 Chloride 3 / 2 25 21 20 0 / 0 0% / 0% No Monitored Full 17250001 12 Dissolved oxygen 39 / 2 13.3 10.2 10.2 NA / 0 NA / 0% No Monitored Full 17250001 12 pH 39 / 2 8.745 8.31 8.31 0 / NA 0% / NA No Monitored Full 17250001 12 Sulfate 4 / 2 33 30 30 0 / NA 0% / NA No Monitored Full 17250001 12 Temperature 39 / 2 30.2 17.8 21 0 / 0 0% / 0% No Monitored Full Class
BWW1 - Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations % Acute/ Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 17250001 12 Cadmium 3 / 1 0.15 0.15 0.15 0 / 0 0% / 0% No Evaluated Full 17250001 12 Copper 7 / 2 3.9 1.2 1 0 / 0 0% / 0% No Evaluated Full 17250001 12 Lead 3 / 1 0.5 0.5 0.5 0 / 0 0% / 0% No Evaluated Full 17250001 12 Mercury 3 / 1 0.025 0.0175 0.025 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 47f BMIBI BIT BMIBI Pass/ Fail 846 9/6/13 3425 47f MS/WW Hess 52 Fair 51 Pass 846 9/6/13 3425 47f MS/WW Float ArtSub 34 Fair 51 Fail 846 8/8/12 3425 47f MS/WW Hess 62 Good 51 Pass 846 8/8/12 3425 47f MS/WW ArtSub 24 Poor 51 Fail 846 9/1/11 3425 47f MS/WW ArtSub 59 Good 51 Pass BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/Thermal Riffle Stream? FIBI score FIBI Class 47f FIBI BIT FIBI Pass/ Fail 1093 8/5/11 3450 47f MS/WW NA 35 Fair 36 Pass Community Assessment Type Assessment Result Support Level IR Category Reason Benthic Macroinvertebrates Evaluated Pass (3/5) Full Fish Evaluated Pass (1/1) Full FIBI passed using 7 point UAV applied to single
samples. Overall Evaluated Pass Full 1 Assessment was evaluated because it included samples
not collected in the last five years and the drainage areas of the sample
sites were larger than the calibrated range. Class
C - Conventional Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Violations % Violations Significantly >10% Violations Assessment Type Support Level 17250001 12 Inorganic nitrogen (nitrate and nitrite) 39 / 2 15.6 8.79 9.2 16 41% Yes Monitored Not Class
C - Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value Number of Non - Detects Mean Value > Criterion or MCL Assessment Type Support Level 17250001 12 Cadmium 3 / 1 0.15 0.15 0.15 3 No All Non-Detect Full 17250001 12 Lead 3 / 1 0.5 0.5 0.5 3 No All Non-Detect Full Site ID Date Species Name Biopart # in sample chlordane result chlordane violation (>0.6)? PCBs result PCBs violation (>0.2)? Hg result Hg violation (>0.3)? Assessment Type Support Level 198 9/9/2010 flathead catfish fillet 3 0.152 No Evaluated Full 198 9/3/2010 common carp fillet 5 <0.03 No <0.09 No 0.105 No Evaluated Full Class
HH-FW - Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value Number of Non - Detects Mean Value > Criterion or MCL Assessment Type Support Level 17250001 12 Copper 7 / 2 3.9 1.2 1 3 No Evaluated Full 17250001 12 Mercury 3 / 1 0.025 0.0175 0.025 3 No All Non-Detect Full
Class BWW1 - Biological Sampling:
Fish:
Overall:
Class HH – Fish Tissue Sampling: