Wapsipinicon River IA 01-WPS-343
from Harter Cr. at Independence (NW 1/4 S34 T89N R9W Buchanan Co.) to confluence with Little Wapsipinicon R. near Littleton in S9 T89N R10W Buchanan 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
- 8/25/2020 12:44:06 PM
- Updated
- 10/15/2020 1:54:33 PM
Assessment Summary
The Class A1 use was assessed as “partially supported” based levels of indicator bacteria (E. coli) that violated state water quality criteria. The Class BWW1 use was assessed as "partially supported" based on biological sampling data. The Class HH use was assessed as “fully supported” based on water quality monitoring data.
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 10100001 Wapsipinicon River near Independence (US1) Iowa DNR 6 BIO See Below 949 Wapsipinicon River Independence 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 10100001 6 14 / 3 182.77 342.97 588.95 Yes 9 64% 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 10100001 6 36 / 3 8.5 7.9 7.9 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 10100001 6 Ammonia 36 / 3 0.87 0.08 0.02 0 / 0 0% / 0% No Monitored Full 10100001 6 Chloride 36 / 3 28 18.6 20 0 / 0 0% / 0% No Monitored Full 10100001 6 Dissolved Oxygen 36 / 3 13.9 10.1 9.5 NA / 0 NA / 0% No Monitored Full 10100001 6 pH 36 / 3 8.5 7.9 7.9 0 / NA 0% / NA No Monitored Full 10100001 6 Sulfate 36 / 3 33 17 17 0 / NA 0% / NA No Monitored Full 10100001 6 Temperature 36 / 3 24.2 11.3 10.6 0 / 0 0% / 0% No Monitored Full Class BWW1 -
Toxic Parameters: WQ 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 10100001 6 Aluminum 8 / 2 1.8 0.614 0.53 0 / 0 0% / 0% No Evaluated Full 10100001 6 Arsenic 9 / 2 0.7 0.5 0.6 0 / 0 0% / 0% No Evaluated Full 10100001 6 Cadmium 9 / 2 0.025 0.025 0.025 0 / 0 0% / 0% No Evaluated Full 10100001 6 Chromium 9 / 2 0.88 0.65 0.62 0 / 0 0% / 0% No Evaluated Full 10100001 6 Copper 9 / 2 2.2 0.93 0.73 0 / 0 0% / 0% No Evaluated Full 10100001 6 Lead 9 / 2 0.15 0.074 0.06 0 / 0 0% / 0% No Evaluated Full 10100001 6 Nickel 9 / 2 2.5 2.1 2.1 0 / 0 0% / 0% No Evaluated Full 10100001 6 Selenium 9 / 2 1.3 0.61 0.64 0 / 0 0% / 0% No Evaluated Full 10100001 6 Zinc 9 / 2 2.8 1.3 1.1 0 / 0 0% / 0% No Evaluated Full Class BWW1 - Biological Sampling: Benthic
Macroinvertebrates: BioNet Site ID Date Drainage Area (mi2) Ecoregion Major Drainage/ Thermal BM Sample Gear BMIBI score BMIBI Class 47c BMIBI BIT BMIBI Pass/ Fail 949 10/3/17 909 47c MS/WW ArtSub 63 Good 52 Pass 949 9/9/14 909 47c MS/WW Float ArtSub 21 Poor 52 Fail 949 9/3/13 909 47c MS/WW ArtSub 45 Fair 52 Fail Overall Assessment: Community Assessment Type Assessment Result Support Level Earned IR Category Actual IR Category Reason Benthic
Macroinvertebrates Evaluated Fail (1/3) Partial 3bu 3bu Assessment is evaluated because the
assessment was based on samples older than five years and the watershed size
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 10100001 6 Cadmium 9 / 2 0.025 0.025 0.025 9 No All Non-Detect Full 10100001 6 Chromium 9 / 2 0.88 0.65 0.62 0 No Evaluated Full 10100001 6 Copper 9 / 2 2.2 0.93 0.73 0 No Evaluated Full 10100001 6 Nickel 9 / 2 2.5 2.1 2.1 0 No Evaluated Full 10100001 6 Selenium 9 / 2 1.3 0.61 0.64 3 No Evaluated Full 10100001 6 Zinc 9 / 2 2.8 1.3 1.1 0 No Evaluated Full
Assessment Key Dates
1/7/2016 | Fixed Monitoring Start Date |
12/11/2018 | Fixed Monitoring End Date |
9/3/2013 | Biological Monitoring |
9/9/2014 | Biological Monitoring |
10/3/2017 | Biological Monitoring |
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 |