Pleasant Creek Lake IA 02-CED-459
Linn County S31T85NR8W 4 mi. NNW of Palo.
- Cycle
- 2022
- Release Status
- Final
- Overall IR
- 2 - Some of the designated uses are met but there is insufficient data to determine if remaining designated uses are met.
- Trophic
- Eutrophic
- Trend
- Stable
- Created
- 12/17/2021 10:24:38 AM
- Updated
- 1/7/2022 7:53:22 AM
The Class A1 use was assessed as “fully supported.” The Class BLW use was assessed as “fully supported.” All other designated uses were "not assessed."
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description Iowa DNR 6 WQ CY 2019-2020 21570001 Pleasant
Creek Beach (Pleasant Creek State Park)
Iowa DNR 6 WQ CY 2016-2020 22570001 Pleasant
Creek Lake
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 21570001 6 0/15/13 NA 34 33 NO NA 2 / 4 2 / 4 NO Monitored Full 22570001 6 3/3/3 5 5 5 NO 0 / NA 0 / NA 0 / NA NO Evaluated Full 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 22570001 6 15 / 5 7.6 8.8 8.2 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 22570001 6 Chlorophyll a TSI 15 / 5 35 76 57 NO Monitored Full 22570001 6 Secchi TSI 15 / 5 41 70 60 NO Monitored Full 22570001 6 Total Phosphorus TSI 15 / 5 37 71 57 NA NA NA 22570001 6 Inorganic suspended solids 15 / 5 0.6 9.8 1 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 22570001 6 Ammonia 15 / 5 0.0003 0.232 0.05 NA 0 / 0 4 NO Monitored Full 22570001 6 Dissolved Oxygen 15 / 5 3.4 12.1 8.3 2 NA / NA 4 NO Monitored Full 22570001 6 pH 15 / 5 7.6 8.8 8.2 0 NA / NA 4 NO Monitored Full 22570001 6 Temperature 15 / 5 20.1 26.9 23.5 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 22570001 6 6 29.66 86.5% 1.10 17.0% NO Evaluated NA
Class HH – No Data