Water Quality Database
Sampling Parameters
View All
Nitrate + Nitrite Nitrogen as N
(current)
Total Phosphate as P
E. Coli Bacteria
Transparency
Temperature - Celsius
Temperature in Fahrenheit
pH
Ammonia Nitrogen as N
Chloride (Lab)
Sulfate
Total Suspended Solids
Atrazine - Screen
Membrane Fecal Coliform
Total Flow
Instantaneous Discharge
Gage Height
Sampling Locations
View All
Bear Creek
[25-BEA-10]
Beaver Creek, IA
[05-BEI-10]
Beaver Creek, MN
[04-BEM-10]
Bigalk Creek
[07-BIG-10]
Canoe Creek
[20-CAN-10]
Casey Springs
[11-CAS-10]
Clear Creek
[28-CLE-10]
Coldwater Creek
[09-COL-10]
Coon Creek
[19-COO-20]
Decorah Dry Run
[15-DDR-10]
Dry Run
[13-DRY-10]
French Creek
[29-FRE-10]
Little Iowa
[02-LIT-10]
N. Branch of the Upper Iowa
[01-NBR-10]
North Bear
[24-NBE-10]
Patterson Creek
[21-PAT-10]
Pine Creek
[10-PIN-10]
Pine Creek East
[22-PIE-10]
Siewers Spring
[32-SSP-10]
Silver Creek East
[27-SIE-10]
Silver Creek West
[08-SIW-40]
South Bear
[23-SBE-10]
Staff Creek
[03-STA-10]
Ten Mile
[12-TEN-10]
Trout River
[18-TRI-10]
Trout Run
[16-TRU-10]
Upper Iowa River at Bluffton
[31-UIR-80]
Upper Iowa River at Freeport
[17-UIR-55]
Upper Iowa River at Mouth
[30-UIR-10]
Waterloo Creek
[26-WAT-10]
About
UpperIowaRiver.org
Download N Data
CSV Format
4397 samples collected
Sampling Results By Year
All Years
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2002
2001
2000
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for All Years
(mg/L)
10.1
10.1
9.2
9.2
9.2
9.2
8.4
8.4
7.8
7.8
7.2
7.2
7.2
7.2
7.1
7.1
7.1
7.1
7.1
7.1
6.6
6.6
6.5
6.5
6.5
6.5
6.3
6.3
6.2
6.2
6.2
6.2
5.5
5.5
5.2
5.2
4.8
4.8
4.8
4.8
4.2
4.2
4.1
4.1
4.1
4.1
3.8
3.8
2.4
2.4
2.3
2.3
2.2
2.2
2.1
2.1
2
2
2
2
N
0
1
2
3
4
5
6
7
8
9
10
11
03-STA-10: Staff Creek
01-NBR-10: N. Branch of the Upper Iowa
05-BEI-10: Beaver Creek, IA
08-SIW-40: Silver Creek West
02-LIT-10: Little Iowa
04-BEM-10: Beaver Creek, MN
07-BIG-10: Bigalk Creek
31-UIR-80: Upper Iowa River at Bluffton
13-DRY-10: Dry Run
32-SSP-10: Siewers Spring
17-UIR-55: Upper Iowa River at Freeport
16-TRU-10: Trout Run
09-COL-10: Coldwater Creek
18-TRI-10: Trout River
12-TEN-10: Ten Mile
19-COO-20: Coon Creek
10-PIN-10: Pine Creek
30-UIR-10: Upper Iowa River at Mouth
24-NBE-10: North Bear
11-CAS-10: Casey Springs
20-CAN-10: Canoe Creek
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
25-BEA-10: Bear Creek
21-PAT-10: Patterson Creek
22-PIE-10: Pine Creek East
15-DDR-10: Decorah Dry Run
27-SIE-10: Silver Creek East
28-CLE-10: Clear Creek
29-FRE-10: French Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2022
(mg/L)
11.9
11.9
11.8
11.8
9.5
9.5
9.2
9.2
8.3
8.3
7.7
7.7
7.6
7.6
7.6
7.6
7.4
7.4
7.3
7.3
7.3
7.3
7.2
7.2
7.2
7.2
7.2
7.2
6.9
6.9
6.6
6.6
6.4
6.4
5.9
5.9
5.5
5.5
4.7
4.7
4.1
4.1
4.1
4.1
4
4
3.6
3.6
3
3
2.5
2.5
2.4
2.4
2.3
2.3
2.2
2.2
2.1
2.1
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
05-BEI-10: Beaver Creek, IA
03-STA-10: Staff Creek
01-NBR-10: N. Branch of the Upper Iowa
02-LIT-10: Little Iowa
04-BEM-10: Beaver Creek, MN
31-UIR-80: Upper Iowa River at Bluffton
07-BIG-10: Bigalk Creek
08-SIW-40: Silver Creek West
18-TRI-10: Trout River
12-TEN-10: Ten Mile
17-UIR-55: Upper Iowa River at Freeport
09-COL-10: Coldwater Creek
13-DRY-10: Dry Run
32-SSP-10: Siewers Spring
16-TRU-10: Trout Run
11-CAS-10: Casey Springs
30-UIR-10: Upper Iowa River at Mouth
19-COO-20: Coon Creek
10-PIN-10: Pine Creek
20-CAN-10: Canoe Creek
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
24-NBE-10: North Bear
25-BEA-10: Bear Creek
29-FRE-10: French Creek
28-CLE-10: Clear Creek
27-SIE-10: Silver Creek East
21-PAT-10: Patterson Creek
22-PIE-10: Pine Creek East
15-DDR-10: Decorah Dry Run
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2021
(mg/L)
8.3
8.3
8
8
7.4
7.4
5.8
5.8
5.8
5.8
5.7
5.7
5.3
5.3
5.3
5.3
5.2
5.2
5.1
5.1
5.1
5.1
4.9
4.9
4.9
4.9
4.7
4.7
4.7
4.7
4.6
4.6
4.5
4.5
4.5
4.5
4.3
4.3
4.2
4.2
3.7
3.7
3.5
3.5
2.7
2.7
2.7
2.7
2.5
2.5
2.4
2.4
2.3
2.3
2.2
2.2
2.2
2.2
1.8
1.8
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
08-SIW-40: Silver Creek West
09-COL-10: Coldwater Creek
01-NBR-10: N. Branch of the Upper Iowa
07-BIG-10: Bigalk Creek
19-COO-20: Coon Creek
31-UIR-80: Upper Iowa River at Bluffton
32-SSP-10: Siewers Spring
13-DRY-10: Dry Run
16-TRU-10: Trout Run
18-TRI-10: Trout River
17-UIR-55: Upper Iowa River at Freeport
04-BEM-10: Beaver Creek, MN
12-TEN-10: Ten Mile
02-LIT-10: Little Iowa
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
11-CAS-10: Casey Springs
24-NBE-10: North Bear
30-UIR-10: Upper Iowa River at Mouth
25-BEA-10: Bear Creek
10-PIN-10: Pine Creek
20-CAN-10: Canoe Creek
28-CLE-10: Clear Creek
29-FRE-10: French Creek
27-SIE-10: Silver Creek East
21-PAT-10: Patterson Creek
22-PIE-10: Pine Creek East
15-DDR-10: Decorah Dry Run
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2020
(mg/L)
7.8
7.8
7.1
7.1
6.7
6.7
6.7
6.7
6.6
6.6
6.6
6.6
6.6
6.6
6.5
6.5
6.4
6.4
6.2
6.2
6.2
6.2
6.2
6.2
6
6
5.6
5.6
5.6
5.6
5.5
5.5
4.9
4.9
4.7
4.7
4.6
4.6
4.5
4.5
4.4
4.4
4.4
4.4
4.3
4.3
4.2
4.2
3.3
3.3
3.2
3.2
2.7
2.7
2.4
2.4
2.4
2.4
2.3
2.3
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
08-SIW-40: Silver Creek West
09-COL-10: Coldwater Creek
03-STA-10: Staff Creek
18-TRI-10: Trout River
07-BIG-10: Bigalk Creek
16-TRU-10: Trout Run
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
01-NBR-10: N. Branch of the Upper Iowa
13-DRY-10: Dry Run
05-BEI-10: Beaver Creek, IA
31-UIR-80: Upper Iowa River at Bluffton
17-UIR-55: Upper Iowa River at Freeport
12-TEN-10: Ten Mile
02-LIT-10: Little Iowa
10-PIN-10: Pine Creek
30-UIR-10: Upper Iowa River at Mouth
11-CAS-10: Casey Springs
24-NBE-10: North Bear
04-BEM-10: Beaver Creek, MN
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
20-CAN-10: Canoe Creek
25-BEA-10: Bear Creek
22-PIE-10: Pine Creek East
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
29-FRE-10: French Creek
15-DDR-10: Decorah Dry Run
28-CLE-10: Clear Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2019
(mg/L)
8.3
8.3
7.9
7.9
7.7
7.7
7.6
7.6
7.5
7.5
7.4
7.4
7.2
7.2
7.2
7.2
7.1
7.1
7
7
6.8
6.8
6.7
6.7
6.5
6.5
6.3
6.3
6.2
6.2
6.1
6.1
6.1
6.1
5
5
5
5
4.7
4.7
4.6
4.6
4.3
4.3
4.3
4.3
4.1
4.1
3.3
3.3
3
3
2.8
2.8
2.4
2.4
2.3
2.3
2.2
2.2
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
03-STA-10: Staff Creek
08-SIW-40: Silver Creek West
01-NBR-10: N. Branch of the Upper Iowa
02-LIT-10: Little Iowa
09-COL-10: Coldwater Creek
18-TRI-10: Trout River
16-TRU-10: Trout Run
19-COO-20: Coon Creek
05-BEI-10: Beaver Creek, IA
17-UIR-55: Upper Iowa River at Freeport
32-SSP-10: Siewers Spring
31-UIR-80: Upper Iowa River at Bluffton
07-BIG-10: Bigalk Creek
12-TEN-10: Ten Mile
13-DRY-10: Dry Run
10-PIN-10: Pine Creek
04-BEM-10: Beaver Creek, MN
20-CAN-10: Canoe Creek
30-UIR-10: Upper Iowa River at Mouth
11-CAS-10: Casey Springs
24-NBE-10: North Bear
25-BEA-10: Bear Creek
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
21-PAT-10: Patterson Creek
22-PIE-10: Pine Creek East
27-SIE-10: Silver Creek East
15-DDR-10: Decorah Dry Run
28-CLE-10: Clear Creek
29-FRE-10: French Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2018
(mg/L)
10.5
10.5
9.1
9.1
9.1
9.1
8.3
8.3
8.2
8.2
7.9
7.9
7.8
7.8
7.8
7.8
7.8
7.8
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.4
7.4
6.7
6.7
6.6
6.6
5.9
5.9
5.9
5.9
5.1
5.1
4.6
4.6
4.1
4.1
3.9
3.9
3.9
3.9
3.4
3.4
2.7
2.7
2.5
2.5
2.3
2.3
2.3
2.3
2.1
2.1
N
0
1
2
3
4
5
6
7
8
9
10
11
12
03-STA-10: Staff Creek
01-NBR-10: N. Branch of the Upper Iowa
05-BEI-10: Beaver Creek, IA
32-SSP-10: Siewers Spring
18-TRI-10: Trout River
02-LIT-10: Little Iowa
31-UIR-80: Upper Iowa River at Bluffton
08-SIW-40: Silver Creek West
16-TRU-10: Trout Run
19-COO-20: Coon Creek
17-UIR-55: Upper Iowa River at Freeport
13-DRY-10: Dry Run
12-TEN-10: Ten Mile
04-BEM-10: Beaver Creek, MN
09-COL-10: Coldwater Creek
07-BIG-10: Bigalk Creek
30-UIR-10: Upper Iowa River at Mouth
20-CAN-10: Canoe Creek
10-PIN-10: Pine Creek
11-CAS-10: Casey Springs
24-NBE-10: North Bear
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
23-SBE-10: South Bear
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
22-PIE-10: Pine Creek East
15-DDR-10: Decorah Dry Run
29-FRE-10: French Creek
28-CLE-10: Clear Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2017
(mg/L)
9.8
9.8
8.9
8.9
8.7
8.7
8.3
8.3
7.9
7.9
7.5
7.5
7.5
7.5
7.4
7.4
6.8
6.8
6.8
6.8
6.7
6.7
6.6
6.6
6.4
6.4
6.4
6.4
6.3
6.3
6.2
6.2
6
6
4.9
4.9
4.9
4.9
4.7
4.7
4.4
4.4
4.1
4.1
4
4
3.6
3.6
3.1
3.1
2.6
2.6
2.6
2.6
2.5
2.5
2
2
1.9
1.9
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
1…
10.5
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
01-NBR-10: N. Branch of the Upper Iowa
02-LIT-10: Little Iowa
08-SIW-40: Silver Creek West
16-TRU-10: Trout Run
32-SSP-10: Siewers Spring
09-COL-10: Coldwater Creek
13-DRY-10: Dry Run
31-UIR-80: Upper Iowa River at Bluffton
18-TRI-10: Trout River
19-COO-20: Coon Creek
04-BEM-10: Beaver Creek, MN
17-UIR-55: Upper Iowa River at Freeport
10-PIN-10: Pine Creek
12-TEN-10: Ten Mile
07-BIG-10: Bigalk Creek
24-NBE-10: North Bear
30-UIR-10: Upper Iowa River at Mouth
11-CAS-10: Casey Springs
20-CAN-10: Canoe Creek
23-SBE-10: South Bear
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
22-PIE-10: Pine Creek East
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
15-DDR-10: Decorah Dry Run
29-FRE-10: French Creek
28-CLE-10: Clear Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2016
(mg/L)
15.8
15.8
13.9
13.9
12.7
12.7
11.9
11.9
10.7
10.7
10.5
10.5
10.4
10.4
9.6
9.6
9.5
9.5
9.3
9.3
8.9
8.9
8.9
8.9
8.4
8.4
8.2
8.2
7.8
7.8
7.5
7.5
6.8
6.8
6.6
6.6
5.8
5.8
5.3
5.3
4.6
4.6
4
4
3.6
3.6
3.4
3.4
3.4
3.4
2.5
2.5
2.5
2.5
1.9
1.9
1.8
1.8
1.8
1.8
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
01-NBR-10: N. Branch of the Upper Iowa
02-LIT-10: Little Iowa
04-BEM-10: Beaver Creek, MN
12-TEN-10: Ten Mile
08-SIW-40: Silver Creek West
31-UIR-80: Upper Iowa River at Bluffton
32-SSP-10: Siewers Spring
13-DRY-10: Dry Run
18-TRI-10: Trout River
17-UIR-55: Upper Iowa River at Freeport
07-BIG-10: Bigalk Creek
16-TRU-10: Trout Run
09-COL-10: Coldwater Creek
19-COO-20: Coon Creek
10-PIN-10: Pine Creek
30-UIR-10: Upper Iowa River at Mouth
11-CAS-10: Casey Springs
20-CAN-10: Canoe Creek
24-NBE-10: North Bear
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
15-DDR-10: Decorah Dry Run
25-BEA-10: Bear Creek
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
29-FRE-10: French Creek
28-CLE-10: Clear Creek
22-PIE-10: Pine Creek East
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2015
(mg/L)
12.3
12.3
10.6
10.6
10.1
10.1
8.5
8.5
8.2
8.2
8.2
8.2
8.2
8.2
7.9
7.9
7.8
7.8
6.9
6.9
6.9
6.9
6.6
6.6
6.5
6.5
6.3
6.3
5.9
5.9
5.6
5.6
5.5
5.5
5.3
5.3
4.6
4.6
4.6
4.6
4
4
4
4
3.9
3.9
3.6
3.6
2.3
2.3
2
2
2
2
2
2
1.9
1.9
1.6
1.6
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
01-NBR-10: N. Branch of the Upper Iowa
08-SIW-40: Silver Creek West
02-LIT-10: Little Iowa
07-BIG-10: Bigalk Creek
04-BEM-10: Beaver Creek, MN
31-UIR-80: Upper Iowa River at Bluffton
13-DRY-10: Dry Run
17-UIR-55: Upper Iowa River at Freeport
32-SSP-10: Siewers Spring
09-COL-10: Coldwater Creek
16-TRU-10: Trout Run
18-TRI-10: Trout River
12-TEN-10: Ten Mile
30-UIR-10: Upper Iowa River at Mouth
19-COO-20: Coon Creek
10-PIN-10: Pine Creek
24-NBE-10: North Bear
11-CAS-10: Casey Springs
26-WAT-10: Waterloo Creek
20-CAN-10: Canoe Creek
23-SBE-10: South Bear
25-BEA-10: Bear Creek
15-DDR-10: Decorah Dry Run
29-FRE-10: French Creek
22-PIE-10: Pine Creek East
27-SIE-10: Silver Creek East
28-CLE-10: Clear Creek
21-PAT-10: Patterson Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2014
(mg/L)
14.9
14.9
12.8
12.8
11.2
11.2
10.8
10.8
10
10
8.6
8.6
8
8
7.6
7.6
7.5
7.5
7.3
7.3
6.8
6.8
6.8
6.8
6.5
6.5
6.5
6.5
6
6
5.6
5.6
5.3
5.3
5
5
4.9
4.9
4.9
4.9
4.4
4.4
4.2
4.2
4
4
3.9
3.9
2.7
2.7
2.3
2.3
2.3
2.3
2.1
2.1
2
2
2
2
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
01-NBR-10: N. Branch of the Upper Iowa
04-BEM-10: Beaver Creek, MN
02-LIT-10: Little Iowa
08-SIW-40: Silver Creek West
31-UIR-80: Upper Iowa River at Bluffton
07-BIG-10: Bigalk Creek
13-DRY-10: Dry Run
17-UIR-55: Upper Iowa River at Freeport
16-TRU-10: Trout Run
32-SSP-10: Siewers Spring
12-TEN-10: Ten Mile
18-TRI-10: Trout River
09-COL-10: Coldwater Creek
30-UIR-10: Upper Iowa River at Mouth
19-COO-20: Coon Creek
10-PIN-10: Pine Creek
11-CAS-10: Casey Springs
24-NBE-10: North Bear
26-WAT-10: Waterloo Creek
20-CAN-10: Canoe Creek
23-SBE-10: South Bear
25-BEA-10: Bear Creek
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
15-DDR-10: Decorah Dry Run
22-PIE-10: Pine Creek East
29-FRE-10: French Creek
28-CLE-10: Clear Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2013
(mg/L)
11.8
11.8
11.7
11.7
11.2
11.2
9.6
9.6
9.3
9.3
9
9
8.2
8.2
8.2
8.2
8.1
8.1
8
8
7.8
7.8
7.7
7.7
7.5
7.5
6.8
6.8
6.6
6.6
6.2
6.2
5.8
5.8
5.4
5.4
5
5
5
5
4.5
4.5
4.2
4.2
3.9
3.9
3.8
3.8
2.4
2.4
2.1
2.1
2.1
2.1
2
2
1.9
1.9
1.9
1.9
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
01-NBR-10: N. Branch of the Upper Iowa
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
08-SIW-40: Silver Creek West
02-LIT-10: Little Iowa
04-BEM-10: Beaver Creek, MN
31-UIR-80: Upper Iowa River at Bluffton
13-DRY-10: Dry Run
07-BIG-10: Bigalk Creek
32-SSP-10: Siewers Spring
12-TEN-10: Ten Mile
17-UIR-55: Upper Iowa River at Freeport
16-TRU-10: Trout Run
18-TRI-10: Trout River
09-COL-10: Coldwater Creek
30-UIR-10: Upper Iowa River at Mouth
10-PIN-10: Pine Creek
19-COO-20: Coon Creek
11-CAS-10: Casey Springs
24-NBE-10: North Bear
20-CAN-10: Canoe Creek
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
23-SBE-10: South Bear
27-SIE-10: Silver Creek East
21-PAT-10: Patterson Creek
15-DDR-10: Decorah Dry Run
22-PIE-10: Pine Creek East
28-CLE-10: Clear Creek
29-FRE-10: French Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2012
(mg/L)
6.8
6.8
6.3
6.3
6.2
6.2
5.9
5.9
5.8
5.8
5.3
5.3
5.2
5.2
5.1
5.1
5
5
4.6
4.6
4.6
4.6
4.4
4.4
4.2
4.2
3.9
3.9
3.8
3.8
3.5
3.5
3.1
3.1
3
3
2.8
2.8
2.7
2.7
2.5
2.5
2.5
2.5
2.4
2.4
2.4
2.4
2.3
2.3
1.8
1.8
1.7
1.7
1.4
1.4
1.4
1.4
0.9
0.9
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
07-BIG-10: Bigalk Creek
13-DRY-10: Dry Run
08-SIW-40: Silver Creek West
01-NBR-10: N. Branch of the Upper Iowa
32-SSP-10: Siewers Spring
24-NBE-10: North Bear
16-TRU-10: Trout Run
23-SBE-10: South Bear
19-COO-20: Coon Creek
09-COL-10: Coldwater Creek
26-WAT-10: Waterloo Creek
31-UIR-80: Upper Iowa River at Bluffton
25-BEA-10: Bear Creek
17-UIR-55: Upper Iowa River at Freeport
12-TEN-10: Ten Mile
18-TRI-10: Trout River
11-CAS-10: Casey Springs
04-BEM-10: Beaver Creek, MN
20-CAN-10: Canoe Creek
02-LIT-10: Little Iowa
30-UIR-10: Upper Iowa River at Mouth
10-PIN-10: Pine Creek
28-CLE-10: Clear Creek
29-FRE-10: French Creek
22-PIE-10: Pine Creek East
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
15-DDR-10: Decorah Dry Run
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2011
(mg/L)
8.5
8.5
8.1
8.1
8.1
8.1
7.3
7.3
7.3
7.3
7.2
7.2
7.1
7.1
7.1
7.1
6.8
6.8
6.7
6.7
6.6
6.6
6.5
6.5
6.4
6.4
6.3
6.3
6.1
6.1
6.1
6.1
5.6
5.6
5.5
5.5
5.2
5.2
5.1
5.1
4.6
4.6
4.4
4.4
4.4
4.4
4.4
4.4
2.8
2.8
2.6
2.6
2.5
2.5
2.3
2.3
1.9
1.9
1.6
1.6
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
01-NBR-10: N. Branch of the Upper Iowa
03-STA-10: Staff Creek
08-SIW-40: Silver Creek West
07-BIG-10: Bigalk Creek
13-DRY-10: Dry Run
02-LIT-10: Little Iowa
16-TRU-10: Trout Run
32-SSP-10: Siewers Spring
31-UIR-80: Upper Iowa River at Bluffton
17-UIR-55: Upper Iowa River at Freeport
09-COL-10: Coldwater Creek
12-TEN-10: Ten Mile
19-COO-20: Coon Creek
05-BEI-10: Beaver Creek, IA
18-TRI-10: Trout River
10-PIN-10: Pine Creek
24-NBE-10: North Bear
04-BEM-10: Beaver Creek, MN
30-UIR-10: Upper Iowa River at Mouth
11-CAS-10: Casey Springs
26-WAT-10: Waterloo Creek
23-SBE-10: South Bear
20-CAN-10: Canoe Creek
25-BEA-10: Bear Creek
21-PAT-10: Patterson Creek
15-DDR-10: Decorah Dry Run
22-PIE-10: Pine Creek East
27-SIE-10: Silver Creek East
28-CLE-10: Clear Creek
29-FRE-10: French Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2010
(mg/L)
12.2
12.2
11.2
11.2
11.1
11.1
9.5
9.5
9.3
9.3
8.9
8.9
7.8
7.8
7.5
7.5
7.4
7.4
7.1
7.1
7
7
6.8
6.8
6.8
6.8
6.6
6.6
6.5
6.5
6.4
6.4
6.3
6.3
5.6
5.6
5.2
5.2
4.7
4.7
4.6
4.6
4.3
4.3
4.2
4.2
4
4
2.9
2.9
2.5
2.5
2.1
2.1
2
2
1.9
1.9
1.7
1.7
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
03-STA-10: Staff Creek
01-NBR-10: N. Branch of the Upper Iowa
05-BEI-10: Beaver Creek, IA
04-BEM-10: Beaver Creek, MN
08-SIW-40: Silver Creek West
02-LIT-10: Little Iowa
07-BIG-10: Bigalk Creek
31-UIR-80: Upper Iowa River at Bluffton
17-UIR-55: Upper Iowa River at Freeport
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
13-DRY-10: Dry Run
16-TRU-10: Trout Run
12-TEN-10: Ten Mile
18-TRI-10: Trout River
10-PIN-10: Pine Creek
09-COL-10: Coldwater Creek
30-UIR-10: Upper Iowa River at Mouth
24-NBE-10: North Bear
11-CAS-10: Casey Springs
20-CAN-10: Canoe Creek
23-SBE-10: South Bear
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
21-PAT-10: Patterson Creek
15-DDR-10: Decorah Dry Run
27-SIE-10: Silver Creek East
22-PIE-10: Pine Creek East
29-FRE-10: French Creek
28-CLE-10: Clear Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2009
(mg/L)
7.6
7.6
6.4
6.4
6.3
6.3
6.1
6.1
5.7
5.7
5.6
5.6
5.4
5.4
5.3
5.3
5.3
5.3
5.1
5.1
4.9
4.9
4.8
4.8
4.8
4.8
4.6
4.6
4.2
4.2
4
4
4
4
4
4
3.7
3.7
3.6
3.6
3.4
3.4
2.7
2.7
2.4
2.4
1.8
1.8
1.8
1.8
1.7
1.7
1.7
1.7
1.6
1.6
0
0
0
0
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
08-SIW-40: Silver Creek West
03-STA-10: Staff Creek
01-NBR-10: N. Branch of the Upper Iowa
05-BEI-10: Beaver Creek, IA
31-UIR-80: Upper Iowa River at Bluffton
13-DRY-10: Dry Run
07-BIG-10: Bigalk Creek
17-UIR-55: Upper Iowa River at Freeport
24-NBE-10: North Bear
09-COL-10: Coldwater Creek
04-BEM-10: Beaver Creek, MN
16-TRU-10: Trout Run
18-TRI-10: Trout River
23-SBE-10: South Bear
26-WAT-10: Waterloo Creek
02-LIT-10: Little Iowa
25-BEA-10: Bear Creek
30-UIR-10: Upper Iowa River at Mouth
12-TEN-10: Ten Mile
10-PIN-10: Pine Creek
11-CAS-10: Casey Springs
20-CAN-10: Canoe Creek
22-PIE-10: Pine Creek East
27-SIE-10: Silver Creek East
29-FRE-10: French Creek
21-PAT-10: Patterson Creek
28-CLE-10: Clear Creek
15-DDR-10: Decorah Dry Run
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2008
(mg/L)
10
10
8.6
8.6
8.5
8.5
7.9
7.9
7.5
7.5
7.2
7.2
7.2
7.2
7.1
7.1
7
7
6.8
6.8
6.7
6.7
6.7
6.7
6.7
6.7
6.2
6.2
5.7
5.7
5.5
5.5
5.5
5.5
4.9
4.9
4.6
4.6
4.6
4.6
4.5
4.5
4.3
4.3
3.3
3.3
2.8
2.8
2.7
2.7
2.5
2.5
2
2
1.9
1.9
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
01-NBR-10: N. Branch of the Upper Iowa
03-STA-10: Staff Creek
08-SIW-40: Silver Creek West
05-BEI-10: Beaver Creek, IA
02-LIT-10: Little Iowa
16-TRU-10: Trout Run
07-BIG-10: Bigalk Creek
31-UIR-80: Upper Iowa River at Bluffton
13-DRY-10: Dry Run
10-PIN-10: Pine Creek
17-UIR-55: Upper Iowa River at Freeport
04-BEM-10: Beaver Creek, MN
18-TRI-10: Trout River
09-COL-10: Coldwater Creek
24-NBE-10: North Bear
30-UIR-10: Upper Iowa River at Mouth
12-TEN-10: Ten Mile
11-CAS-10: Casey Springs
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
23-SBE-10: South Bear
20-CAN-10: Canoe Creek
22-PIE-10: Pine Creek East
21-PAT-10: Patterson Creek
15-DDR-10: Decorah Dry Run
27-SIE-10: Silver Creek East
28-CLE-10: Clear Creek
29-FRE-10: French Creek
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2007
(mg/L)
11.1
11.1
10.3
10.3
9.8
9.8
9.3
9.3
9.2
9.2
8.9
8.9
8.6
8.6
8.1
8.1
7.8
7.8
7.7
7.7
7.4
7.4
7.2
7.2
6.9
6.9
6.6
6.6
6.5
6.5
6.3
6.3
5.3
5.3
5.2
5.2
5.1
5.1
4
4
3.9
3.9
3.9
3.9
2.9
2.9
2.4
2.4
2.2
2.2
2
2
1.9
1.9
1.7
1.7
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
12
01-NBR-10: N. Branch of the Upper Iowa
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
04-BEM-10: Beaver Creek, MN
02-LIT-10: Little Iowa
08-SIW-40: Silver Creek West
31-UIR-80: Upper Iowa River at Bluffton
07-BIG-10: Bigalk Creek
13-DRY-10: Dry Run
18-TRI-10: Trout River
17-UIR-55: Upper Iowa River at Freeport
16-TRU-10: Trout Run
12-TEN-10: Ten Mile
10-PIN-10: Pine Creek
30-UIR-10: Upper Iowa River at Mouth
09-COL-10: Coldwater Creek
24-NBE-10: North Bear
11-CAS-10: Casey Springs
20-CAN-10: Canoe Creek
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
23-SBE-10: South Bear
21-PAT-10: Patterson Creek
15-DDR-10: Decorah Dry Run
27-SIE-10: Silver Creek East
22-PIE-10: Pine Creek East
28-CLE-10: Clear Creek
29-FRE-10: French Creek
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2006
(mg/L)
9.7
9.7
8.6
8.6
8.4
8.4
8.2
8.2
7.8
7.8
7.4
7.4
7.4
7.4
6.7
6.7
6.6
6.6
6.5
6.5
6.5
6.5
6.2
6.2
6.1
6.1
6.1
6.1
6
6
5.3
5.3
4.8
4.8
4.7
4.7
4.5
4.5
3.6
3.6
3.4
3.4
3.3
3.3
2
2
1.8
1.8
1.7
1.7
1.6
1.6
1.4
1.4
1.3
1.3
0
0
0
0
N
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
1…
10.5
08-SIW-40: Silver Creek West
01-NBR-10: N. Branch of the Upper Iowa
03-STA-10: Staff Creek
07-BIG-10: Bigalk Creek
05-BEI-10: Beaver Creek, IA
02-LIT-10: Little Iowa
13-DRY-10: Dry Run
31-UIR-80: Upper Iowa River at Bluffton
12-TEN-10: Ten Mile
09-COL-10: Coldwater Creek
10-PIN-10: Pine Creek
16-TRU-10: Trout Run
04-BEM-10: Beaver Creek, MN
18-TRI-10: Trout River
17-UIR-55: Upper Iowa River at Freeport
11-CAS-10: Casey Springs
24-NBE-10: North Bear
30-UIR-10: Upper Iowa River at Mouth
20-CAN-10: Canoe Creek
23-SBE-10: South Bear
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
15-DDR-10: Decorah Dry Run
22-PIE-10: Pine Creek East
21-PAT-10: Patterson Creek
28-CLE-10: Clear Creek
29-FRE-10: French Creek
27-SIE-10: Silver Creek East
32-SSP-10: Siewers Spring
19-COO-20: Coon Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2005
(mg/L)
11.5
11.5
10.9
10.9
9.6
9.6
8.9
8.9
8.6
8.6
8.4
8.4
7.9
7.9
7.7
7.7
7.1
7.1
6.2
6.2
6.1
6.1
5.4
5.4
5.4
5.4
5.3
5.3
4.8
4.8
4.5
4.5
4.5
4.5
4.5
4.5
3.7
3.7
3.5
3.5
3.2
3.2
3
3
2.3
2.3
1.7
1.7
1.6
1.6
1.5
1.5
1.3
1.3
1.2
1.2
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
03-STA-10: Staff Creek
05-BEI-10: Beaver Creek, IA
01-NBR-10: N. Branch of the Upper Iowa
08-SIW-40: Silver Creek West
02-LIT-10: Little Iowa
04-BEM-10: Beaver Creek, MN
31-UIR-80: Upper Iowa River at Bluffton
13-DRY-10: Dry Run
17-UIR-55: Upper Iowa River at Freeport
07-BIG-10: Bigalk Creek
09-COL-10: Coldwater Creek
12-TEN-10: Ten Mile
30-UIR-10: Upper Iowa River at Mouth
10-PIN-10: Pine Creek
11-CAS-10: Casey Springs
24-NBE-10: North Bear
16-TRU-10: Trout Run
18-TRI-10: Trout River
23-SBE-10: South Bear
20-CAN-10: Canoe Creek
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
15-DDR-10: Decorah Dry Run
28-CLE-10: Clear Creek
22-PIE-10: Pine Creek East
29-FRE-10: French Creek
27-SIE-10: Silver Creek East
21-PAT-10: Patterson Creek
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2004
(mg/L)
11.3
11.3
11
11
10.3
10.3
9.7
9.7
9.1
9.1
8.8
8.8
7.9
7.9
7.3
7.3
6.1
6.1
5.9
5.9
5.8
5.8
5.8
5.8
5.7
5.7
5.3
5.3
5.1
5.1
4.8
4.8
4.5
4.5
3.7
3.7
3.4
3.4
3.3
3.3
3.1
3.1
1.8
1.8
1.7
1.7
1.6
1.6
1.5
1.5
1.5
1.5
1.5
1.5
0
0
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
12
03-STA-10: Staff Creek
01-NBR-10: N. Branch of the Upper Iowa
05-BEI-10: Beaver Creek, IA
02-LIT-10: Little Iowa
07-BIG-10: Bigalk Creek
08-SIW-40: Silver Creek West
04-BEM-10: Beaver Creek, MN
13-DRY-10: Dry Run
16-TRU-10: Trout Run
17-UIR-55: Upper Iowa River at Freeport
12-TEN-10: Ten Mile
09-COL-10: Coldwater Creek
18-TRI-10: Trout River
10-PIN-10: Pine Creek
11-CAS-10: Casey Springs
30-UIR-10: Upper Iowa River at Mouth
24-NBE-10: North Bear
23-SBE-10: South Bear
20-CAN-10: Canoe Creek
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
28-CLE-10: Clear Creek
15-DDR-10: Decorah Dry Run
21-PAT-10: Patterson Creek
27-SIE-10: Silver Creek East
29-FRE-10: French Creek
22-PIE-10: Pine Creek East
31-UIR-80: Upper Iowa River at Bluffton
32-SSP-10: Siewers Spring
19-COO-20: Coon Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2002
(mg/L)
12
12
9.8
9.8
9.2
9.2
8.9
8.9
8.8
8.8
7.6
7.6
7.3
7.3
6.1
6.1
6.1
6.1
6
6
5.4
5.4
5.4
5.4
5.1
5.1
5.1
5.1
4.7
4.7
4.3
4.3
4.2
4.2
3.7
3.7
3.7
3.7
3.7
3.7
2.6
2.6
2.4
2.4
2.3
2.3
1.8
1.8
1.7
1.7
1.7
1.7
1.6
1.6
0
0
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
02-LIT-10: Little Iowa
01-NBR-10: N. Branch of the Upper Iowa
05-BEI-10: Beaver Creek, IA
08-SIW-40: Silver Creek West
03-STA-10: Staff Creek
04-BEM-10: Beaver Creek, MN
17-UIR-55: Upper Iowa River at Freeport
07-BIG-10: Bigalk Creek
18-TRI-10: Trout River
09-COL-10: Coldwater Creek
30-UIR-10: Upper Iowa River at Mouth
13-DRY-10: Dry Run
24-NBE-10: North Bear
16-TRU-10: Trout Run
11-CAS-10: Casey Springs
10-PIN-10: Pine Creek
23-SBE-10: South Bear
26-WAT-10: Waterloo Creek
12-TEN-10: Ten Mile
25-BEA-10: Bear Creek
20-CAN-10: Canoe Creek
21-PAT-10: Patterson Creek
22-PIE-10: Pine Creek East
27-SIE-10: Silver Creek East
28-CLE-10: Clear Creek
15-DDR-10: Decorah Dry Run
29-FRE-10: French Creek
32-SSP-10: Siewers Spring
31-UIR-80: Upper Iowa River at Bluffton
19-COO-20: Coon Creek
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2001
(mg/L)
15
15
13
13
12
12
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
01-NBR-10: N. Branch of the Upper Iowa
02-LIT-10: Little Iowa
04-BEM-10: Beaver Creek, MN
28-CLE-10: Clear Creek
27-SIE-10: Silver Creek East
26-WAT-10: Waterloo Creek
25-BEA-10: Bear Creek
24-NBE-10: North Bear
23-SBE-10: South Bear
22-PIE-10: Pine Creek East
21-PAT-10: Patterson Creek
20-CAN-10: Canoe Creek
19-COO-20: Coon Creek
18-TRI-10: Trout River
17-UIR-55: Upper Iowa River at Freeport
16-TRU-10: Trout Run
15-DDR-10: Decorah Dry Run
13-DRY-10: Dry Run
12-TEN-10: Ten Mile
11-CAS-10: Casey Springs
10-PIN-10: Pine Creek
09-COL-10: Coldwater Creek
08-SIW-40: Silver Creek West
07-BIG-10: Bigalk Creek
05-BEI-10: Beaver Creek, IA
03-STA-10: Staff Creek
31-UIR-80: Upper Iowa River at Bluffton
30-UIR-10: Upper Iowa River at Mouth
29-FRE-10: French Creek
32-SSP-10: Siewers Spring
Created with Highcharts 7.1.2
Mean Nitrate + Nitrite Nitrogen as N for 2000
(mg/L)
11
11
10
10
7.2
7.2
6.9
6.9
6
6
5.7
5.7
5.7
5.7
5.4
5.4
5.2
5.2
5
5
4.9
4.9
4.6
4.6
4.4
4.4
4.2
4.2
4.2
4.2
4
4
3.9
3.9
3.8
3.8
3.3
3.3
3.3
3.3
2.8
2.8
2.3
2.3
2
2
1.8
1.8
1.8
1.8
1.6
1.6
1.5
1.5
0
0
0
0
0
0
N
0
1
2
3
4
5
6
7
8
9
10
11
12
07-BIG-10: Bigalk Creek
08-SIW-40: Silver Creek West
09-COL-10: Coldwater Creek
13-DRY-10: Dry Run
10-PIN-10: Pine Creek
16-TRU-10: Trout Run
11-CAS-10: Casey Springs
02-LIT-10: Little Iowa
17-UIR-55: Upper Iowa River at Freeport
18-TRI-10: Trout River
24-NBE-10: North Bear
01-NBR-10: N. Branch of the Upper Iowa
25-BEA-10: Bear Creek
05-BEI-10: Beaver Creek, IA
26-WAT-10: Waterloo Creek
12-TEN-10: Ten Mile
03-STA-10: Staff Creek
23-SBE-10: South Bear
20-CAN-10: Canoe Creek
30-UIR-10: Upper Iowa River at Mouth
04-BEM-10: Beaver Creek, MN
15-DDR-10: Decorah Dry Run
22-PIE-10: Pine Creek East
28-CLE-10: Clear Creek
27-SIE-10: Silver Creek East
21-PAT-10: Patterson Creek
29-FRE-10: French Creek
19-COO-20: Coon Creek
32-SSP-10: Siewers Spring
31-UIR-80: Upper Iowa River at Bluffton