Cold Springs Lake IA 05-NSH-1420
Cass County S15T75NR37W 1 mi S of Lewis.
- Cycle
- 2024
- Release Status
- Final
- Overall IR
- 1 - All designated uses are met.
- Trophic
- Eutrophic
- Trend
- Stable
- Created
- 11/1/2023 8:13:23 AM
- Updated
- 2/5/2024 9:53:27 AM
The Class A1 use was assessed (monitored) as “fully supported." The Class BLW use was assessed (monitored) as “fully supported.” The Class HH (fish consumption) use was assessed (monitored) 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 2018-2022 22150001 Cold
Springs Lake
Iowa DNR 6 FT See Below 1287 Cold
Springs Lake Cold
Springs Park 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 22150001 6 15 / 5 7.7 9.1 8.3 1 4 NO Mon 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 22150001 6 Chlorophyll a TSI 15 / 5 26 67 54 NO Mon Full 22150001 6 Secchi TSI 15 / 5 41 73 53 NO Mon Full 22150001 6 Total Phosphorus TSI 15 / 5 35 68 59 NA NA NA 22150001 6 Inorganic suspended solids 15 / 5 0 11.5 2 NA NA NA Class BLW - 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 22150001 6 Dissolved Oxygen 15 / 5 3.4 13.1 8.1 1 NA / NA 4 NO Mon Full 22150001 6 pH 15 / 5 7.7 9.1 8.3 1 NA / NA 4 NO Mon Full 22150001 6 Temperature 15 / 5 19 28.8 24.7 0 NA / NA 4 NO Mon 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 22150001 6 5 14.69329962 75% 1.464222632 20% NO Evaluated NA Class BLW - Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 22150001 6 Ammonia 15 / 5 0.171 0.07 0.07 0 / 0 NO Mon Full 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) 1287 fillet 2012 channel catfish 5 45.4 0.051 0.03 0.09 1287 tissue plug 2019 largemouth bass 10 32.2 0.244
1287 tissue plug 2017 largemouth bass 3 37.1 0.23
Support Level Full