Clean Lakes Program: Loon - Steuben County

 

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Indiana Clean Lakes Program Lake Report

Loon

  

Steuben County

1989

          
Sample Location: Deep Hole
Sample Date: 1989-07-17
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1989
5.5
2.5
54
15.5
96
7.9
7.4
400
400
196
202
0.01
0.01
0.047
0.055
0.691
0.41
0.03
0.209
1.267
1.497
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
25
24.7
24
23.1
19.3
DO (mg/L)
8.4
7.5
5
1.5
0.1
                                                                           
% Water Column Oxic: 80
  
Blue-Green Dominance (% of NU): 19
  
          Carlson TSI: 54
                    Indiana TSI: 10
                                                                           
Blue-Greens (#/L): 637   Greens (#/L): 264   Diatoms (#/L): 1307   Other Algae (#/L): 837   Rotifers (#/L): 336   Zooplankton (#/L): 0
 
 

1992

          
Sample Location: Deep Hole
Sample Date: 1992-07-20
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1992
5.5
2.3
60
17
97.05
8
7.3
380
395
123
136
0.01
0.01
0.037
0.045
0.708
0.711
0.048
0.39
1.434
1.407
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
24.5
24.5
24.5
24.2
23
22.1
19
DO (mg/L)
8
7.7
7.9
7.7
5.3
0.4
0.1
                                                                           
% Water Column Oxic: 72.7
  
Blue-Green Dominance (% of NU): 8
  
          Carlson TSI: 52
                    Indiana TSI: 12
                                                                           
Blue-Greens (#/L): 579   Greens (#/L): 299   Diatoms (#/L): 111   Other Algae (#/L): 5384   Rotifers (#/L): 1045   Zooplankton (#/L): 0
 
 

1997

          
Sample Location: Deep Hole
Sample Date: 1997-08-18
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
1997
5.5
1.9
35
15
88.4
7.94
7.65
370
379
145.8
147.1
0.01
0.01
0.015
0.015
5.83
0.022
0.024
0.018
0.1
0.9
0.9
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
23
22.9
22.9
22.9
22.5
22.1
21.2
DO (mg/L)
7.26
7.62
7.6
7.18
6.4
6.05
0.01
                                                                           
% Water Column Oxic: 83.3
  
Blue-Green Dominance (% of NU): 15
  
          Carlson TSI: 47
                    Indiana TSI: 7
                                                                           
Blue-Greens (#/L): 1289   Greens (#/L): 561   Diatoms (#/L): 1146   Other Algae (#/L): 5718   Rotifers (#/L): 131   Zooplankton (#/L): 32.7
 
 

2002

          
Sample Location: Deep Hole
Sample Date: 2002-07-30
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2002
5.5
2.9
70
13.5
96.9
8.1
7.7
465
495
156
162
0.01
0.011
0.032
0.051
3.28
0.013
0.013
0.018
0.06
0.933
1.063
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
27.7
27.5
27.5
27.3
26.7
24.4
18.9
DO (mg/L)
7.8
7.7
7.7
7.6
7.6
0.8
0.3
                                                                           
% Water Column Oxic: 57.9
  
Blue-Green Dominance (% of NU): 21
  
          Carlson TSI: 47
                    Indiana TSI: 10
                                                                           
Blue-Greens (#/L): 1178   Greens (#/L): 411   Diatoms (#/L): 2523   Other Algae (#/L): 935   Rotifers (#/L): 523   Zooplankton (#/L): 13.4
 
 

2009

          
Sample Location: Deep Hole
Sample Date: 2009-07-06
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2009
5.49
2.5
20.37
15.09
85.4
8.1
7.8
400
400
132
131
0.01
0.01
0.01
0.015
3.96
0.014
0.013
0.018
0.022
0.9
1.12
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
23.8
23.7
23.7
23.6
23.6
21.1
20.2
DO (mg/L)
7.3
7.2
7.3
7.4
7.2
4.5
0.53
                                                                           
% Water Column Oxic: 72.85
  
Blue-Green Dominance (% of NU): 57.6
  
          Carlson TSI: 43
                    Indiana TSI: 20
                                                                           
Blue-Greens (#/L): 7717   Greens (#/L): 398   Diatoms (#/L): 424   Other Algae (#/L): 2784   Rotifers (#/L): 1936   Zooplankton (#/L): 143.2
 
 

2010

          
Sample Location: Deep Hole
Sample Date: 2010-06-30
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2010
5.2
1.9
9.8
10
70
8.1
7.5
414
409
155
160
0.01
0.01
0.021
0.049
2.08
0.013
0.013
0.05
0.063
0.765
0.856
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
24.9
25.1
25.1
25.1
25
22.4
DO (mg/L)
6.3
6.1
6.2
6
5.9
0.1
                                                                           
% Water Column Oxic: 58
  
Blue-Green Dominance (% of NU): 85
  
Blue-Green Dominance (% of cells): 43.6
           Carlson TSI: 46
                    Indiana TSI: 34
                                                                           
Blue-Greens (#/L): 1958646   Greens (#/L): 818693   Diatoms (#/L): 756514   Other Algae (#/L): 974141   Rotifers (#/L): 0   Zooplankton (#/L): 9
Blue-Greens (cells/L): 25880   Greens (cells/L): 2806   Diatoms (cells/L): 757   Other Algae (cells/L): 974   Rotifers (cells/L): 0   Zooplankton (cells/L): 0
 
 

2013

          
Sample Location: Deep Hole
Sample Date: 2013-06-24
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2013
4.88
1
16.15
10.82
8.3
7.6
491
514
158
159.75
0.005
0.011
0.0315
0.043
10.56
0.013
0.013
0.118
0.161
0.871
0.508
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
27.68
27.27
26.87
23.75
21.07
DO (mg/L)
7.5
7.51
7.7
2.62
0.27
                                                                           
% Water Column Oxic: 61.48
  
Blue-Green Dominance (% of NU): 89.5
  
Blue-Green Dominance (% of cells): 54.4
           Carlson TSI: 57
                   
                                                                           
Blue-Greens (#/L): 2495681   Greens (#/L): 1523526   Diatoms (#/L): 116080   Other Algae (#/L): 449803   Rotifers (#/L): 229   Zooplankton (#/L): 265
Blue-Greens (cells/L): 57763   Greens (cells/L): 3019   Diatoms (cells/L): 116   Other Algae (cells/L): 3613   Rotifers (cells/L): 0   Zooplankton (cells/L): 0
 
 

2015

          
Sample Location: deep hole
Sample Date: 2015-07-06
Year
Max Depth
(m)
Secchi
(m)
Light 3'
(%)
1% Light Level
(ft)
DO @5'
(%)
pH
Epi
pH
Hypo
Cond
Epi
Cond
Hypo
Alk
Epi
Alk
Hypo
SRP
Epi
SRP
Hypo
TP
Epi
TP
Hypo
Chl-a
(ug/L)
NO3
Epi
NO3
Hypo
NH3
Epi
NH3
Hypo
TKN
Epi
TKN
Hypo
2015
18
5.904
17.27
4.5
8.15
453
460
126.5
0.01
0.028
8.065
0.013
0.018
0.8475
Depth (m)
 0 
 1 
1.5
 2 
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Temp (oC)
26.2
24.9
23
21.6
20.7
DO (mg/L)
8.4
8.9
9.4
7.8
5.2
                                                                           
% Water Column Oxic: 100
  
Blue-Green Dominance (% of NU):
 
Blue-Green Dominance (% of cells):
          Carlson TSI: 46
                   
                                                                           
Blue-Greens (#/L):   Greens (#/L):   Diatoms (#/L):   Other Algae (#/L):   Rotifers (#/L):   Zooplankton (#/L):
Blue-Greens (cells/L):   Greens (cells/L):   Diatoms (cells/L):   Other Algae (cells/L):   Rotifers (cells/L):   Zooplankton (cells/L):
 
 

 

In 2011 CLP changed plankton sampling methods, thus the Indiana TSI is no longer calculated.
Epi
 Epilimnion
Alk
 Alkalinity (mg CaCO3/L)
DO
 Dissolved Oxygen (mg/L)
NH3
 Ammonia (mg-N/L)
SRP
 Soluable Reactive Phosphorus (mg-P/L)
Hypo
 Hypolimnion
Chl-a
 Chlorophyll-a (ug/L)
Light 3'
 Percent light penetration at 3ft
NO3
 Nitrate (mg-N/L)
TP
 Total Phosphorus (mg-P/L)
   
Cond
 Conductivity
1% Light Level
 Depth of the 1% light level (ft)
TKN
 Total Kjeldahl Nitrogen (mg-N/L)
Temp
 Temperature (oC)