Five Island Lake IA 04-UDM-1300
Palo Alto County S18T96NR32W at Emmetsburg.
- Cycle
- 2022
- Release Status
- Final
- Overall IR
- 4 - Water is impaired or threatened and a TMDL has been completed or is not needed.
- Trophic
- Hypereutrophic
- Trend
- Stable
- Created
- 12/30/2021 10:56:21 AM
- Updated
- 1/6/2022 6:55:17 AM
The Class A1 use was assessed (monitored) as “not supported” due to aesthetically objectionable conditions caused by poor water transparency due to both non-algal turbidity and algae. The Class BLW use was assessed (evaluated) as "WINOFI” due to a large population of cyanobacteria. The Class HH (fish consumption) use was assessed as "fully supported" based on fish tissue sampling data. Note: A TMDL for algae and turbidity at Five Island Lake was prepared by DNR and approved by EPA in 2006. Because all Section 303(d) impairments identified for the current assessment/listing cycle (algal growth and turbidity) are addressed by the TMDL, this waterbody remains in IR Category 4a (impaired; TMDL approved).
Data
Sources: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description Iowa DNR 6 WQ CY 2016-2019 22740001 Five
Island Lake Iowa DNR 6 FT See Below 190 Five
Island Lake at
Emmetsburg
Class A1 - Indicator Bacteria: No Data Class A1 - 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 22740001 6 12 / 4 8 8.8 8.4 0 4 NO Monitored Full Class A1 - Lake TSI's: Site ID Data Source ID Parameter Name # Samples / # Years Minimum Value Maximum Value Median Value Median TSI Violation? Assessment Type Support Level 22740001 6 Chlorophyll a TSI 12 / 4 36 75 66 YES Monitored Not 22740001 6 Secchi TSI 12 / 4 49 83 73 YES Monitored Not 22740001 6 Total Phosphorus TSI 12 / 4 54 81 71 NA NA NA 22740001 6 Inorganic suspended solids 12 / 4 0.4 23.5 6.7 NA NA NA Class BLW - Conventional 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 22740001 6 Ammonia 12 / 4 0.0003 0.175 0.04 NA 0 / 0 4 NO Monitored Full 22740001 6 Dissolved Oxygen 12 / 4 5 10.85 8.86 0 NA / NA 4 NO Monitored Full 22740001 6 pH 12 / 4 8 8.8 8.4 0 NA / NA 4 NO Monitored Full 22740001 6 Temperature 12 / 4 16 28.3 23 0 NA / NA 4 NO Monitored Full Class BLW - Lake Planktonic Cyanobacteria: Site ID Data Source ID # Samples Maximum Cyanobacteria Wet Mass Maximum Cyanobacteria % Composition Median Cyanobacteria Wet Mass Median Cyanobacteria % Composition Median Cyanobacteria Concentration = 75th Percentile Assessment Type Support Level 22740001 6 6 153.19 99.4% 39.10 94.7% YES Evaluated 3b Class HH - Fish Tissue Sampling: Site ID Biopart Year Species # in sample / # of samples Avg Length (cm) (Avg) Hg (ppm) Chlordane (ppm) Sum PCBs (ppm) 190 fillet 2012 channel catfish 5 43 0.022 0.03 0.09 190 tissue plug 2012 walleye 5 37.1 0.037
Support Level Full