Mississippi River IA 01-NEM-75
from Lock & Dam 11 at north side of Dubuque (Dubuque Co.) to Lock & Dam 10 at Guttenberg (Clayton Co.)
- Cycle
- 2024
- 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.
- Trend
- Unknown
- Created
- 11/1/2023 8:13:20 AM
- Updated
- 2/2/2024 2:52:32 PM
| Cycle Added | Class | Cause | Data Source | Rationale |
|---|---|---|---|---|
| 2006 | Class BWW1 | Metals: Aluminum | Ambient monitoring: adjacent state | New data: WQ improvement (chemical / physical / bacterial) |
The Class A1 use was assessed as "fully supported" based on water quality monitoring data. The Class BWW1 use was assessed as “fully supported” based on water quality monitoring data. The Class HH use was assessed as "WINOFI" based fish tissue sampling data. According to DNR’s assessment methodology, the one-time occurrence of a level of mercury above an advisory trigger level does not suggest impairment of the fish consumption use. The Iowa DNR/DPH advisory protocol states that two consecutive samplings that show contaminant levels are above the trigger level in edible tissue are needed to justify issuance of an advisory.
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site
Name Site
Description IEPA 10 WQ CY 2020-2022 99990018 Mississippi
River
Iowa DNR 6 FT See Below 1142 Mississippi
River downstream
of Guttenberg Iowa DNR 6 FT See Below 1159 Mississippi
River Mud
Lake near Dubuque Iowa DNR 6 FT See Below 1381 Mississippi
River Guttenberg
Boat Ramp 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 99990018 10 8 / 2 7.4 8.6 8 0 3 NO Mon Full 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 99990018 10 Chloride 12 / 3 12.8 23 18.1 NA 0 / 0 4 NO Mon Full 99990018 10 Dissolved Oxygen 8 / 2 6.6 14.3 10.6 0 NA / NA 3 NO Mon Full 99990018 10 pH 8 / 2 7.4 8.6 8 0 NA / NA 3 NO Mon Full 99990018 10 Sulfate 12 / 3 11.4 37.2 22.8 0 NA / NA 4 NO Mon Full 99990018 10 Temperature 8 / 2 0 23.4 11 0 NA / NA 3 NO Mon Full 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 99990018 10 Aluminum 12 / 3 959 349 272.5 0 / 1 NO Mon Full 99990018 10 Ammonia 7 / 2 0.36 0.12 0.09 0 / 0 NO Eval Full 99990018 10 Arsenic 12 / 3 18.5 2.3 1 0 / 0 NO Mon Full 99990018 10 Cadmium 12 / 3 184 16.7 1.5 1 / 1 NO Mon Full 99990018 10 Chromium 12 / 3 2.5 1.3 0.9 0 / 0 NO Mon Full 99990018 10 Copper 12 / 3 2.5 2.4 2.5 0 / 0 NO Mon Full 99990018 10 Cyanide 12 / 3 1 0.89 1 0 / 0 NO Mon Full 99990018 10 Lead 12 / 3 2.5 2.3 2.5 0 / 0 NO Mon Full 99990018 10 Nickel 12 / 3 2.5 1.6 1.1 0 / 0 NO Mon Full 99990018 10 Selenium 12 / 3 2.5 2.5 2.5 0 / 0 NO Mon Full 99990018 10 Silver 12 / 3 3.41 1.54 1.5 0 / 0 NO Mon Full 99990018 10 Zinc 12 / 3 5 3.5 2.5 0 / 0 NO Mon Full Site ID Data Source ID Parameter Name # Samples per Year (2020/ 2021/2022) 2020 Mean 2021 Mean 2022 Mean # Non-Detects per Year (2020/ 2021/2022) Support Level per Year (2020/ 2021/2022) Assessment Type Support Level 99990018 10 Arsenic 4/4/4 1.075 1.02 1.09 0/0/2 Full/Full/Full Mon Full 99990018 10 Cadmium 4/4/4 0 0 0 4/4/4 Full/Full/Full Mon Full 99990018 10 Chromium 4/4/4 1.825 0.972 1.965 1/0/2 Full/Full/Full Mon Full 99990018 10 Chromium 4/4/4 1.825 0.972 1.965 1/0/2 Full/Full/Full Mon Full 99990018 10 Copper 4/4/4 2.185 0 0 3/4/4 Full/Full/Full Mon Full 99990018 10 Cyanide 4/4/4 0.67 0 0 2/4/4 Full/Full/Full Mon Full 99990018 10 Nickel 4/4/4 1.345 2.262 2.48 0/1/3 Full/Full/Full Mon Full 99990018 10 Selenium 4/4/4 0 0 0 4/4/4 Full/Full/Full Mon Full 99990018 10 Zinc 4/4/4 5.582 5.958 5.74 3/3/3 Full/Full/Full Mon Full Site ID Biopart Year Species # in sample / # of samples Avg Length (cm) (Avg) Hg (ppm) Chlordane (ppm) Sum PCBs (ppm) 1159 tissue plug 2013 largemouth bass 5 35.0 0.165
1142 tissue plug 2015 largemouth bass 5 31.7 0.124
1142 fillet 2015 common carp 4 54.9 0.150 0.02 0.06 1381 tissue plug 2020 largemouth bass 20 32.7 0.244 1381 tissue plug 2020 northern pike 20 60.0 0.190 1381 tissue plug 2020 sauger 35 31.1 0.142 1381 tissue plug 2020 shovelnose sturgeon 10 49.3 0.056 1381 tissue plug 2020 walleye 15 43.6 0.207 1381 tissue plug 2020 yellow perch 20 22.3 0.082 1381 tissue plug 2021 freshwater drum 40 45.5 0.338
Support Level WINOFI 3b
Class A1 - Indicator Bacteria: No Data
Class A1 – pH:
Class BWW1 - Binomial Parameters:
Class BWW1 - Toxic Parameters:
Class HH-F - Toxic Parameters:
Class HH - Fish Tissue Sampling: