Assessment Summary
The Class A1 use was assessed as "partially supported" due to high levels of indicator bacteria (fecal coliforms) reported by the Illinois EPA. The Class BWW1 use was assessed as "not supported" due to violations of state water quality criteria for aluminum. The Class C use was assessed as “fully supported” based on water quality monitoring data. The Class HH use was assessed as "partially supported” due to high levels of PCBs in fish tissue and the issuance of a one meal per week consumption advisory. The results of interstate consultation via the UMRBA Water Quality Task Force in February 2016 were also used to develop this assessment.
Assessment Explanation
Data Sources:
|
Data Source
|
Data Source ID
|
Data Type
|
Data Age
|
Site ID
|
Site Name
|
Site Description
|
|
IEPA
|
10
|
WQ
|
CY 2016-2018
|
99990016
|
Mississippi River
|
Illinois EPA
at station M-02 at Lock and Dam 15 at Arsenal Island at river mile 482.9
|
|
Iowa DNR
|
6
|
FT
|
See Below
|
47
|
Mississippi River
|
|
Class A1 -
Indicator Bacteria:
The Class A1 use remains assessed as “partially supported” based on the impairment of the primary contact recreation use identified for this segment of the Upper
Mississippi River by the Illinois EPA for the 2016 Section 303(d) listing
cycle. The Illinois EPA identified an impairment of primary contact recreation
use in this river segment due to high levels of indicator bacteria (fecal
coliforms). This assessment was developed as a result of interstate
consultation on Section 303(d) listing conducted through the Upper Mississippi
River Basin Association’s “Water Quality Task Force” in June 2016.
Class A1 - pH:
|
Site ID
|
Data Source ID
|
# Samples / # Years
|
Maximum Value
|
Mean Value
|
Median Value
|
# Violations
|
% Violations
|
Significantly >10% Violations
|
Assessment Type
|
Support Level
|
|
99990016
|
10
|
21 / 3
|
9
|
7.7
|
7.7
|
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
|
|
99990016
|
10
|
Ammonia
|
19 / 3
|
0.75
|
0.13
|
0.07
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Chloride
|
23 / 3
|
22.3
|
17.6
|
16.7
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Dissolved oxygen
|
21 / 3
|
14.2
|
10.3
|
9.8
|
NA / 0
|
NA / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
pH
|
21 / 3
|
9
|
7.7
|
7.7
|
0 / NA
|
0% / NA
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Sulfate
|
23 / 3
|
53.2
|
32
|
31.1
|
0 / NA
|
0% / NA
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Temperature
|
21 / 3
|
27.1
|
14.4
|
15.3
|
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
|
|
99990016
|
10
|
Aldrin
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Aluminum
|
23 / 3
|
879
|
400
|
334
|
2 / 23
|
9%/100%
|
Yes
|
Monitored
|
Not
|
|
99990016
|
10
|
Arsenic
|
23 / 3
|
2.66
|
1.15
|
1
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Cadmium
|
23 / 3
|
1.5
|
1.45
|
1.5
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Chlorpyrifos-methyl
|
20 / 3
|
0.05
|
0.05
|
0.05
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Chromium
|
21 / 3
|
4.56
|
2.11
|
2.5
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Copper
|
23 / 3
|
8.17
|
2.49
|
2.5
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Cyanide
|
13 / 2
|
1
|
0.92
|
1
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Dieldrin
|
20 / 3
|
0.005
|
0.0048
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Endrin
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Heptachlor
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Heptachlor epoxide
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Lead
|
23 / 3
|
11.2
|
4.58
|
4.16
|
0 / 2
|
0% / 9%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Lindane
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Nickel
|
23 / 3
|
3.12
|
1.93
|
2.25
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
p,p'-DDD
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
p,p'-DDE
|
20 / 3
|
0.005
|
0.0048
|
0.005
|
0 / 2
|
0% / 10%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
p,p'-DDT
|
20 / 3
|
0.005
|
0.005
|
0.005
|
0 / 1
|
0% / 5%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Parathion
|
20 / 3
|
0.05
|
0.05
|
0.05
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Pentachlorophenol
|
21 / 3
|
0.2
|
0.2
|
0.2
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Phenol
|
23 / 3
|
5.99
|
4.22
|
5
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Polychlorinated Biphenyls (PCBs)
|
20 / 3
|
0.05
|
0.05
|
0.05
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Selenium
|
23 / 3
|
2.5
|
2.39
|
2.5
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Toxaphene
|
20 / 3
|
0.5
|
0.5
|
0.5
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Zinc
|
21 / 3
|
98.1
|
14.2
|
10.2
|
0 / 0
|
0% / 0%
|
No
|
Monitored
|
Full
|
Class C -
Conventional Parameters:
|
Site ID
|
Data Source ID
|
Parameter Name
|
# Samples / # Years
|
Maximum Value
|
Mean Value
|
Median Value
|
# Violations
|
% Violations
|
Significantly >10% Violations
|
Assessment Type
|
Support Level
|
|
99990016
|
10
|
Chloride
|
23 / 3
|
22.3
|
17.6
|
16.7
|
0
|
0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Fluoride
|
23 / 3
|
370
|
139
|
130
|
0
|
0%
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Inorganic nitrogen (nitrate and nitrite)
|
23 / 3
|
4.04
|
2.349
|
2.31
|
0
|
0%
|
No
|
Monitored
|
Full
|
Class C - 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
|
|
99990016
|
10
|
Alachlor
|
20 / 3
|
0.01
|
0.01
|
0.01
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Atrazine
|
20 / 3
|
0.43
|
0.083
|
0.05
|
10
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Beryllium
|
23 / 3
|
0.5
|
0.46
|
0.5
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Cadmium
|
23 / 3
|
1.5
|
1.45
|
1.5
|
22
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Chromium
|
21 / 3
|
4.56
|
2.11
|
2.5
|
11
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Dalapon
|
21 / 3
|
2.5
|
2.5
|
2.5
|
21
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Dinoseb
|
21 / 3
|
0.5
|
0.5
|
0.5
|
21
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Glyphosate
|
20 / 3
|
15
|
15
|
15
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Lead
|
23 / 3
|
11.2
|
4.58
|
4.16
|
5
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Silver
|
23 / 3
|
1.5
|
1.29
|
1.5
|
16
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Silvex
|
21 / 3
|
0.5
|
0.5
|
0.5
|
21
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Simazine
|
20 / 3
|
0.05
|
0.05
|
0.05
|
20
|
No
|
Monitored
|
Full
|
Class HH-FW -
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
|
|
99990016
|
10
|
2,4-D
|
21 / 3
|
0.5
|
0.5
|
0.5
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Aldrin
|
20 / 3
|
0.005
|
0.005
|
0.005
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Barium
|
23 / 3
|
69.9
|
53.8
|
54.5
|
0
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Copper
|
23 / 3
|
8.17
|
2.49
|
2.5
|
11
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Cyanide
|
13 / 2
|
1
|
0.92
|
1
|
10
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Dieldrin
|
20 / 3
|
0.005
|
0.0048
|
0.005
|
19
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Endrin
|
20 / 3
|
0.005
|
0.005
|
0.005
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Heptachlor
|
20 / 3
|
0.005
|
0.005
|
0.005
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Heptachlor epoxide
|
20 / 3
|
0.005
|
0.005
|
0.005
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Hexachlorobenzene
|
20 / 3
|
0.005
|
0.0048
|
0.005
|
19
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Lindane
|
20 / 3
|
0.005
|
0.005
|
0.005
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Methoxychlor
|
20 / 3
|
0.025
|
0.0241
|
0.025
|
19
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Nickel
|
23 / 3
|
3.12
|
1.93
|
2.25
|
7
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
p,p'-DDD
|
20 / 3
|
0.005
|
0.005
|
0.005
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
p,p'-DDE
|
20 / 3
|
0.005
|
0.0048
|
0.005
|
18
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
p,p'-DDT
|
20 / 3
|
0.005
|
0.005
|
0.005
|
19
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Pentachlorophenol
|
21 / 3
|
0.2
|
0.2
|
0.2
|
21
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Phenol
|
23 / 3
|
5.99
|
4.22
|
5
|
12
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Polychlorinated Biphenyls (PCBs)
|
20 / 3
|
0.05
|
0.05
|
0.05
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Selenium
|
23 / 3
|
2.5
|
2.39
|
2.5
|
21
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Toxaphene
|
20 / 3
|
0.5
|
0.5
|
0.5
|
20
|
No
|
Monitored
|
Full
|
|
99990016
|
10
|
Zinc
|
21 / 3
|
98.1
|
14.2
|
10.2
|
2
|
No
|
Monitored
|
Full
|
Class HH -
Fish Tissue Sampling:
|
Site ID
|
Date
|
Species Name
|
Biopart
|
# in sample
|
chlordane result
|
chlordane violation (>0.6)?
|
PCBs result
|
PCBs violation (>0.2)?
|
Hg result
|
Hg violation (>0.3)?
|
Assessment Type
|
Support Level
|
|
47
|
10/1/18
|
channel catfish
|
fillet
|
1
|
<0.02
|
No
|
<0.06
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
channel catfish
|
fillet
|
1
|
<0.02
|
No
|
<0.06
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
channel catfish
|
fillet
|
1
|
0.03
|
No
|
<0.08
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
common carp
|
fillet
|
1
|
<0.02
|
No
|
<0.06
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
common carp
|
fillet
|
1
|
<0.02
|
No
|
<0.06
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
common carp
|
fillet
|
1
|
<0.02
|
No
|
<0.06
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
large carp
|
fillet
|
1
|
0.02
|
No
|
0.13
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
large carp
|
fillet
|
1
|
0.02
|
No
|
0.18
|
No
|
|
|
Monitored
|
Full
|
|
47
|
10/1/18
|
large carp
|
fillet
|
1
|
<0.03
|
No
|
<0.06
|
No
|
|
|
Monitored
|
Full
|
|
47
|
8/9/17
|
largemouth bass
|
plug
|
3
|
|
|
|
|
0.147
|
No
|
Monitored
|
Full
|
|
47
|
10/17/16
|
white bass
|
plug
|
5
|
|
|
|
|
0.222
|
No
|
Monitored
|
Full
|
|
45
|
9/21/15
|
common carp
|
fillet
|
5
|
<0.02
|
No
|
<0.06
|
No
|
0.08
|
No
|
Monitored
|
Full
|
|
45
|
9/11/14
|
common carp
|
fillet
|
3
|
0.03
|
No
|
<0.06
|
No
|
0.07
|
No
|
Monitored
|
Full
|
|
45
|
9/11/14
|
large carp
|
fillet
|
3
|
<0.02
|
No
|
0.42
|
Yes
|
0.11
|
No
|
Monitored
|
Partial
|
|
45
|
9/11/14
|
white bass
|
plug
|
5
|
|
|
|
|
0.186
|
No
|
Monitored
|
Full
|
The level of total PCBs in the 2014 composite sample of large common carp was approximately two times higher than the one-meal/week consumption advisory threshold. Based on this confirmation sampling, a one meal per week consumption advisory for large common carp (>20") was issued by Iowa DNR and Iowa DPH. Follow-up monitoring in 2015 and 2016 showed decreased levels. According to Iowa’s consumption advisory protocol, however, two consecutive samplings that show levels of fish contaminants are below the advisory threshold are needed to rescind an existing advisory. Thus, the segment will remain assessed as "partially supported” due to high levels of PCBs in fish tissue and the issuance of a one meal per week consumption advisory.
|
