Maquoketa River IA 01-MAQ-14
from N. Fk. Maquoketa R. to confluence with Farm Cr. in S10 T85N R1W Jones Co.
- Assessment Cycle
- 2020
- Release Status
- Final
- Data Collection Period
- Overall IR Category
- 5 - Water is impaired or threatened and a TMDL is needed.
- Trend
- Unknown
- Created
- 8/13/2020 8:02:54 AM
- Updated
- 10/13/2020 10:47:55 AM
Assessment Summary
The Class A1 use was assessed as "partially supported" due to levels of indicator bacteria (E. coli) that exceeded state water quality criteria. The Class BWW1 use remains assessed as "not supported" due the apparent elimination of the freshwater mussel community from this river segment. The Class HH use was assessed as "fully supported" based on water quality monitoring data. 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
Sources of
Data: Data Source Data Source ID Data Type Data Age Site ID Site Name Site Description Iowa DNR 6 WQ CY 2016-2018 10490004 Maquoketa River west of Maquoketa
Iowa DNR 6 BIO See Below 1151 Maquoketa River 0.9 mi upstream of HWY 61 bridge Maquoketa Class A1 -
Indicator Bacteria: Site ID Data Source ID # Samples / # Years 2016 Geometric Mean 2017 Geometric Mean 2018 Geometric Mean Annual Geometric Mean Violation # Violations % Violations Significantly >10% Violations Assessment Type Support Level 10490004 6 21 / 3 526.52 492.26 883.35 Yes 15 71% Yes Monitored Partial Class A - pH: Site ID Data Source ID # Samples / # Years Maximum Value Mean Value Median Value # Violations % Violations Significantly >10% Violations Assessment Type Support Level 10490004 6 36 / 3 8.4 8.1 8.2 0 0% No Monitored Full Class BWW1 -
Conventional Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations % Acute/ Chronic Violations Significantly >10% Violations Assessment Type Support Level 10490004 6 Ammonia 36 / 3 0.39 0.06 0.02 0 / 0 0% / 0% No Monitored Full 10490004 6 Chloride 36 / 3 23 18.7 18.5 0 / 0 0% / 0% No Monitored Full 10490004 6 Dissolved oxygen 36 / 3 14.5 10.9 11.1 NA / 0 NA / 0% No Monitored Full 10490004 6 pH 36 / 3 8.4 8.1 8.2 0 / NA 0% / NA No Monitored Full 10490004 6 Sulfate 36 / 3 27 21.3 21.5 0 / NA 0% / NA No Monitored Full 10490004 6 Temperature 36 / 3 26.6 11.9 11.7 0 / 0 0% / 0% No Monitored Full Class BWW1 -
Toxic Parameters: Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value # Acute / Chronic Violations % Acute/ Chronic Violations >1 Acute / Chronic Violation Assessment Type Support Level 10490004 6 Aluminum 9 / 2 1.7 0.882 0.88 0 / 0 0% / 0% No Evaluated Full 10490004 6 Arsenic 9 / 2 0.96 0.69 0.77 0 / 0 0% / 0% No Evaluated Full 10490004 6 Cadmium 9 / 2 0.48 0.078 0.025 0 / 1 0% / 11% No Evaluated Full 10490004 6 Chromium 9 / 2 1.1 0.77 0.82 0 / 0 0% / 0% No Evaluated Full 10490004 6 Copper 9 / 2 2 0.89 0.79 0 / 0 0% / 0% No Evaluated Full 10490004 6 Lead 9 / 2 0.22 0.087 0.06 0 / 0 0% / 0% No Evaluated Full 10490004 6 Nickel 9 / 2 2.8 2 2.1 0 / 0 0% / 0% No Evaluated Full 10490004 6 Selenium 9 / 2 1.7 0.97 0.99 0 / 0 0% / 0% No Evaluated Full 10490004 6 Zinc 9 / 2 20 3.23 1 0 / 0 0% / 0% No Evaluated Full Class BWW1 – Freshwater
Mussel Sampling: 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 BWW1 – Biological
Sampling: Benthic Macroinvertebrates: BioNet Site
ID Date Drainage
Area (mi2) Ecoregion Major
Drainage BM Sample
Gear BMIBI score BMIBI Class 47f BMIBI
BIT BMIBI Pass/
Fail 1151 9/11/17 950.0 47f MS Hess 40 Fair 51 Fail 1151 10/6/14 950.0 47f MS Hess 45 Fair 51 Fail 1151 10/6/14 950.0 47f MS Float ArtSub 50 Fair 51 Fail Overall: Community Assessment
Type Assessment
Result Support
Level Earned IR
Category Actual IR
Category Reason Benthic Macroinvertebrate Evaluated Fail (0/3) Partial Fish NA NA NA Overall Evaluated Fail Partial 3bu 3bu Assessment is evaluated because the drainage area of
sampling site was larger than the calibrated range. Class HH-F -
Toxic Parameters:
Site ID Data Source ID Parameter Name # Samples / # Years Maximum Value Mean Value Median Value Number of Non - Detects Mean Value > Criterion or MCL Assessment Type Support Level 10490004 6 Cadmium 9 / 2 0.48 0.078 0.025 7 No Evaluated Full 10490004 6 Chromium 9 / 2 1.1 0.77 0.82 0 No Evaluated Full 10490004 6 Copper 9 / 2 2 0.89 0.79 0 No Evaluated Full 10490004 6 Nickel 9 / 2 2.8 2 2.1 0 No Evaluated Full 10490004 6 Selenium 9 / 2 1.7 0.97 0.99 1 No Evaluated Full 10490004 6 Zinc 9 / 2 20 3.23 1 0 No Evaluated Full
Assessment Key Dates
| 9/30/1985 | Biological Monitoring |
| 9/30/1999 | Biological Monitoring |
| 1/5/2016 | Fixed Monitoring Start Date |
| 12/6/2018 | Fixed Monitoring End Date |
| 9/11/2017 | Biological Monitoring |
| 10/6/2014 | 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 |