Maquoketa River IA 01-MAQ-14
from N. Fk. Maquoketa R. to confluence with Farm Cr. in S10 T85N R1W Jones Co.
- Assessment Cycle
- 2022
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 12/6/2021 3:06:16 PM
- Updated
- 1/12/2022 2:35:35 PM
Assessment Summary
The Class A1 use was assessed as "not supported" due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW1 use was assessed as "not supported" due the apparent elimination of the freshwater mussel community from this river segment. All other designated uses were "not assessed." Note: A TMDL for pathogen indicators in this segment of the Maquoketa River was prepared by DNR and approved by EPA in 2006.
Assessment Explanation
Data Sources: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2018-2020 10490004 Maquoketa River west of Maquoketa
Iowa DNR 6 BIO See Below 381 Maquoketa
River Canton
– REMAP #62 Iowa DNR 6 BIO See Below 1151 Maquoketa
River 0.9
mi upstream of Hwy 61 bridge - Maquoketa 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 10490004 6 7/7/8 883 1399 728 YES 6 / 3 5 / 3 5 / 3 YES Monitored Not 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 10490004 6 36 / 3 7.3 8.4 8.1 0 7 NO Monitored 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 10490004 6 Ammonia 36 / 3 0.02 0.43 0.08 NA 0 / 0 7 NO Monitored Full 10490004 6 Chloride 36 / 3 8.2 23 17.7 NA 0 / 0 7 NO Monitored Full 10490004 6 Dissolved Oxygen 36 / 3 7.6 13.5 11 0 NA / NA 7 NO Monitored Full 10490004 6 pH 36 / 3 7.3 8.4 8.1 0 NA / NA 7 NO Monitored Full 10490004 6 Sulfate 36 / 3 8.7 26 19 0 NA / NA 7 NO Monitored Full 10490004 6 Temperature 36 / 3 0.1 27.1 12.1 0 NA / NA 7 NO Monitored 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 10490004 6 Aluminum 14 / 3 1.7 0.7 0.3 0 / 0 NO Monitored Full 10490004 6 Arsenic 13 / 3 0.96 0.66 0.66 0 / 0 NO Monitored Full 10490004 6 Cadmium 13 / 3 0.07 0.03 0.02 0 / 0 NO Monitored Full 10490004 6 Chromium 13 / 3 1.2 1 1 0 / 0 NO Monitored Full 10490004 6 Lead 13 / 3 0.47 0.14 0.11 0 / 0 NO Monitored Full 10490004 6 Nickel 13 / 3 3.5 2.5 2.5 0 / 0 NO Monitored Full 10490004 6 Silver 13 / 3 0.025 0.025 0.025 0 / 0 NO Monitored Full 10490004 6 Zinc 13 / 3 5.3 2 1.8 0 / 0 NO Monitored Full Site ID Date Drainage Area (mi2) Ecoregion Major Drainage BM Sample Gear BMIBI score BMIBI Class 47f BMIBI BIT BMIBI Pass/ Fail 381 10/13/20 754 47f MS Floating Art Sub 59 Good 51 Pass 1151 9/11/17 950 47f MS Hess 40 Fair 51 Fail Community Assessment Type Assessment Result Support Level IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (1/2) Not Assessment was evaluated
because the drainage areas of the sample sites Overall Evaluated Fail WINOFI 3bu were greater than the
calibrated range. Freshwater Mussel Survey # Freshwater Mussel Species # Freshwater Mussel Species Increase/Decrease % Freshwater Mussel Species Increase/Decrease Assessment Type Support Level IR Category 1984-85 (Frest 1987) 5 1998-99 (Arbuckle et
al. 2000) 0 -5 -100% Evaluated Not 5b As presented by
Arbuckle et al. (2000), the potential causes of declines in species richness
of Iowa's freshwater mussels include siltation, destabilization of stream
substrate, stream flow instability, and high instream levels of nutrients
(phosphorus and nitrogen). Their study also suggested the importance of
stream shading provided by riparian vegetation to mussel species richness.
Class A1 - Indicator Bacteria:
Class A - pH
Class BWW1 - Conventional Parameters:
Class BWW1 - Toxic Parameters:
Class
BWW1 - Biological Sampling:
Benthic Macroinvertebrates:
Overall:
Class BWW1 – Freshwater
Mussel Sampling:
Class HH - No Data
Assessment Key Dates
9/30/1985 | Biological Monitoring |
9/30/1999 | Biological Monitoring |
1/9/2018 | Fixed Monitoring Start Date |
12/1/2020 | Fixed Monitoring End Date |
9/11/2017 | Biological Monitoring |
10/13/2020 | Biological Monitoring |
6/1/2006 | TMDL Completed |
Methods
150 | Monitoring data more than 5 years old |
230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
315 | Regional reference site approach |
320 | Benthic macroinvertebrate surveys |
420 | Indicator bacteria monitoring |