Winnebago River IA 02-WIN-831
from confluence with Pike Run (S25 T99N R24W Winnebago Co.) to the Iowa/Minnesota state line
- Cycle
- 2024
- Release Status
- Final
- Overall IR
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 11/1/2023 8:12:35 AM
- Updated
- 12/29/2023 1:29:12 PM
The presumptive Class A1 use was assessed as “WINOFI” due to violations of Iowa water quality criteria for indicator bacteria (E. coli).The Class BWW2 use was assessed as "not supported" based on biological sampling data. All other designated uses were "not assessed."
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description MNPCA 15 WQ CY 2019-2020 99990106 Lime Creek
Iowa DNR 6 BIO See Below 30 Winnebago
River Lande
Access – Lake Mills Presumptive Class
A1 - Indicator Bacteria: Site ID Data Source ID # Samples per Year (2018/ 2019/2020) 2018 Geometric Mean 2019 Geometric Mean 2020 Geometric Mean Violates Annual Geometric Mean? # 2018 SSM violations / SSM Violations
needed for impairment # 2019 SSM violations / SSM Violations
needed for impairment # 2020 SSM violations / SSM Violations
needed for impairment Violates Annual SSM Significantly >10%
Rule? Assessment Type Support Level 99990106 15 0/5/6 NA 193 176 YES NA 1 / NA 2 / NA NA Evaluated WINOFI Class A - pH Site ID Data Source ID # Samples / # Years Minimum Value Maximum Value Mean Value # Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 99990106 15 23 / 2 7 8.5 7.9 0 5 NO Monitored Full Class BWW2 -
Binomial Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Minimum Value Maximum Value Mean Value # Violations # Acute / Chronic Violations Violations needed for impairment Violates Significantly >10% Rule? Assessment Type Support Level 99990106 15 Dissolved Oxygen 23 / 2 4.7 13.4 8.4 2 NA / NA 5 NO Monitored Full 99990106 15 pH 23 / 2 7 8.5 7.9 0 NA / NA 5 NO Monitored Full 99990106 15 Temperature 23 / 2 9.924 27 20.834 0 NA / NA 5 NO Monitored Full Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47b BMIBI BIT BMIBI Pass/Fail 30 9/2/20 112.5 47b MS Art Sub 51 Fair 62 Fail 30 9/28/15 112.5 47b MS Art Sub 57 Good 62 Fail Site ID Date Drainage Area (mi2) Ecoregion Major Drainage Riffle Stream? FIBI score FIBI Class 47b FIBI BIT FIBI Pass/Fail 30 9/2/20 112.5 47b MS No 27 Fair 32 Fail 30 9/28/15 112.5 47b MS No 24 Poor 32 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (0/2) Not
Fish Evaluated Fail (0/2) Not 5bv Assessment was evaluated
because it included samples not collected in Overall Evaluated Fail Not the last five years.
Class
BWW2 - Biological Sampling:
Benthic Macroinvertebrates:
Fish:
Overall: