Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Wapsipinicon River IA 01-WPS-350

from L. Wapsipinicon R. (S3 T94N R13W Chickasaw Co.) to confluence with unnamed tributary in NW 1/4 S22 T96N R14W Chickasaw 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 8:12:40 AM
Updated
1/18/2024 1:36:22 PM
Use Support
Class A1
Recreation - Primary contact
Not Assessed
Class BWW1
Aquatic Life - Warm Water Type 1
Fully Supported
Class HH
Human Health -
Not Assessed
Impairment Delistings
No delistings for this assessment cycle.
Documentation
Assessment Summary

The Class BWW1 use was assessed as “fully supported” based on biological sampling data and continuous dissolved oxygen monitoring data. All other designated uses were "not assessed."

Assessment Explanation

Data Sources:

Data Source

Data Source ID

Data Type

Data Age

Site ID

Site Name

Site Description

Iowa DNR

6

WQ

CY 2021

412

Wapsipinicon River

Iowa DNR

6

BIO

See Below

11

Wapsipinicon River

Twin Ponds Park


Class A1 – No Data

Class BWW1 - Biological Sampling:

Benthic Macroinvertebrates:

Site ID

Date

Drainage Area (mi2)

Ecoregion

Major Drainage

BM Sample Gear

BMIBI score

BMIBI Class

47c BMIBI BIT

BMIBI Pass/Fail

11

9/16/20

161.9

47c

MS

Art Sub

80

Excellent

52

Pass

11

9/29/14

161.9

47c

MS

Art Sub

50

Fair

52

Fail

11

10/14/10

161.9

47c

MS

Art Sub

60

Good

52

Pass


Fish:

Site ID

Date

Drainage Area (mi2)

Ecoregion

Major Drainage

Riffle Stream?

FIBI score

FIBI Class

47c FIBI BIT

FIBI Pass/Fail

11

9/16/20

161.9

47c

MS

No

63

Good

44

Pass

11

9/30/14

161.9

47c

MS

No

63

Good

44

Pass


Overall:

Community

Assessment Type

Assessment Result

Support Level

IR Category

Reason

Benthic Macroinvertebrates

Evaluated

Pass (2/3)

Full

Fish

Evaluated

Pass (2/2)

Full

1

Assessment was evaluated because some of the samples used to complete

Overall

Evaluated

Pass

Full

the assessment were greater than five years old.


Class BWW1- Continuous DO Monitoring:

Site ID

Data Source ID

# Days Monitoring (2021)

DO Criteria Type

# 2021 violations / Violations needed for impairment

Violates Annual Significantly >10% Rule?

Assessment Type

Support Level

24 hr

5/6

No

412

6

29

16 hr

1/6

No

Evaluated

Full



Class HH – No Data

Monitoring and Methods
Assessment Key Dates
10/14/2010
Biological Monitoring
9/29/2014
Biological Monitoring
9/30/2014
Biological Monitoring
9/16/2020
Biological Monitoring
8/18/2021
Monitoring Start
9/15/2021
Monitoring End
Methods
150
Monitoring data more than 5 years old
200
Physical/Chemical Monitoring
315
Regional reference site approach
320
Benthic macroinvertebrate surveys
330
Fish surveys
380
Quantitative physical habitat assessment