Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Maquoketa River IA 01-MAQ-13

Deep Cr. (Jackson Co.) to confluence with N. Fk. Maquoketa R. in S13 T84N R2E Jackson Co.

Assessment Cycle
2024
Release Status
Pending
Data Collection Period
Overall IR Category
5 - Water is impaired or threatened and a TMDL is needed.
Trend
Stable
Created
11/1/2023 8:12:24 AM
Updated
12/11/2023 2:39:17 PM
Assessment conducted in accordance with Iowa's 2024 IR methodology.
Use Support
Class A1
Not Supported
Bacteria: Indicator Bacteria- E. coli
Support Level
Not Supported
Impairment Code
5a - Pollutant-caused impairment. TMDL needed.
Cause Magnitude
Slight
Status
Continuing
Source
Unknown: Source Unknown
Source Confidence
N/A
Cycle Added
2012
Impairment Rationale
Geometric mean criterion exceeded
Data Source
Ambient monitoring: USGS
TMDL Priority
Tier III
Class BWW1
Fully Supported
Class HH
Fully Supported
Impairment Delistings
No delistings for this assessment cycle.
Documentation
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 “fully supported” based on water quality monitoring data and biological sampling data. The Class HH use was assessed as “fully supported” based on fish tissue sampling data and water quality monitoring data.

Assessment Explanation

Data Sources:

Data Source

Data Source ID

Data Type

Data Age

Site ID

Site Name

Site Description

Iowa DNR

6

WQ

CY 2020-2022

10490005

Maquoketa River at Spragueville

Iowa DNR

6

BIO

See Below

1153

Maquoketa River

Spragueville

Iowa DNR

6

FT

See Below

1173

Maquoketa River

NE of Maquoketa

Iowa DNR

6

FT

See Below

1357

Maquoketa River

Spragueville Access


Class A1 - Indicator Bacteria:

Site ID

Data Source ID

# Samples per Year (2020/ 2021/2022)

2020 Geometric Mean

2021 Geometric Mean

2022 Geometric Mean

Violates Annual Geometric Mean?

# 2020 SSM violations / SSM Violations needed for impairment

# 2021 SSM violations / SSM Violations needed for impairment

# 2022 SSM violations / SSM Violations needed for impairment

Violates Annual SSM Significantly >10% Rule?

Assessment Type

Support Level

10490005

6

8/8/8

251

241

281

YES

4 / 3

3 / 3

4 / 3

YES

Mon

Not


Class A1 – pH:

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

10490005

6

36 / 3

7.8

8.5

8.3

0

7

NO

Mon

Full


Class BWW1 - Binomial Parameters:

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

10490005

6

Chloride

36 / 3

14

26

20

NA

0 / 0

7

NO

Mon

Full

10490005

6

Dissolved Oxygen

36 / 3

8

14

11

0

NA / NA

7

NO

Mon

Full

10490005

6

pH

36 / 3

7.8

8.5

8.3

0

NA / NA

7

NO

Mon

Full

10490005

6

Sulfate

36 / 3

15

25

20

0

NA / NA

7

NO

Mon

Full

10490005

6

Temperature

36 / 3

0

27.3

12

0

NA / NA

7

NO

Mon

Full


Class BWW1 - Toxic Parameters:

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

10490005

6

Ammonia

36 / 3

0.27

0.05

0.02

0 / 0

NO

Mon

Full

10490005

6

Cadmium

20 / 3

0.5

0.5

0.5

0 / 0

NO

Mon

Full

10490005

6

Chromium

20 / 3

4

0.86

0.62

0 / 0

NO

Mon

Full

10490005

6

Lead

20 / 3

1

0.92

1

0 / 0

NO

Mon

Full

10490005

6

Nickel

20 / 3

3.3

1

0.8

0 / 0

NO

Mon

Full

10490005

6

Selenium

18 / 2

2

0.6

0.5

0 / 0

NO

Mon

Full

10490005

6

Silver

20 / 3

1

0.902

1

0 / 0

NO

Mon

Full

10490005

6

Zinc

20 / 3

5.9

1.2

0.5

0 / 0

NO

Mon

Full


Class BWW1 - Biological Sampling:


Benthic Macroinvertebrates:

Site ID

Date

Drainage Area (mi2)

Ecoregion

Major Drainage

BM Sample Gear

BMIBI score

BMIBI Class

47f BMIBI BIT

BMIBI Pass/Fail

1153

8/3/21

1677

47f

MS

Floating Art Sub

59

Excellent

51

Pass

1153

9/11/17

1677

47f

MS

Floating Art Sub

80

Excellent

51

Pass


Overall:

Community

Assessment Type

Assessment Result

Support Level

IR Category

Reason

Benthic Macroinvertebrate

Evaluated

Pass (2/2)

Full

Assessment was evaluated because the drainage area of the sample site

Overall

Evaluated

Pass

Full

1

was greater than the calibrated range.


Class HH - Fish Tissue Sampling:

Site ID

Biopart

Year

Species

# in sample / # of samples

Avg Length (cm)

(Avg) Hg (ppm)

Chlordane (ppm)

Sum PCBs (ppm)

1173

whole

2016

common carp

5

49.6

0.05

0.02

0.06

1357

tissue plug

2019

walleye

3

43.7

0.158

1357

tissue plug

2020

walleye

13

48.9

0.23

1357

tissue plug

2021

northern pike

1

61.7

0.201

1357

tissue plug

2021

smallmouth bass

21

29.4

0.156

1357

tissue plug

2021

white bass

10

35.9

0.286

Support Level

Full


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

10490005

6

Selenium

18 / 2

2

0.6

0.5

15

NO

Mon

Full



Monitoring and Methods
Assessment Key Dates
1/6/2020 Monitoring Start
12/5/2022 Monitoring End
7/29/2019 Fish Tissue Monitoring
9/16/2016 Fish Tissue Monitoring
9/11/2017 Biological Monitoring
10/18/2019 Fish Tissue Monitoring
8/3/2021 Biological Monitoring
3/5/2020 Fish Tissue Monitoring
5/8/2021 Fish Tissue Monitoring
6/18/2021 Fish Tissue Monitoring
7/2/2021 Fish Tissue Monitoring
7/6/2021 Fish Tissue Monitoring
Methods
200 Physical/Chemical Monitoring
260 Fish tissue analysis
315 Regional reference site approach
320 Benthic macroinvertebrate surveys
420 Indicator bacteria monitoring