Clean Lakes Program: Loon - Whitley County

 

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Indiana Clean Lakes Program Lake Report

Loon

  

Whitley County

1988

          
Sample Location: Deep Hole
Sample Date: 1988-08-22
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
1988
27.5
2.3
52
18
96
8.5
7.2
280
290
82
167
0.048
0.467
0.1
0.467
0.271
0.388
0.045
2.793
0.853
0.23
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)
26.5
26.5
26.5
24.8
20
15.8
12.5
11
11
10
10
10
10
10
8
8
8
8
8
6
6
6
6
6
6
6
6
DO (mg/L)
7.7
7.6
7.6
5.7
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 14.8
  
Blue-Green Dominance (% of NU):
 
          Carlson TSI: 60
                    Indiana TSI: 0
                                                                           
Blue-Greens (#/L):   Greens (#/L):   Diatoms (#/L):   Other Algae (#/L):   Rotifers (#/L):   Zooplankton (#/L):
 
 

1994

          
Sample Location: Deep Hole
Sample Date: 1994-07-25
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
1994
5.5
1.7
47
13
112
8.7
7.4
390
330
133.4
192.8
0.01
0.388
0.01
0.448
4.64
0.022
0.022
0.018
1.127
0.477
1.155
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)
29.5
29.5
29
28.5
28.5
25
19.5
16.5
13.5
13
12
11.5
11.5
10.5
10
9.5
9
8.5
8.5
8.5
8.5
8.5
8
8
8
8
DO (mg/L)
9.2
9.2
9.2
9.1
8.5
2
0.3
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
                                                                           
% Water Column Oxic: 22
  
Blue-Green Dominance (% of NU): 95
  
          Carlson TSI: 45
                    Indiana TSI: 36
                                                                           
Blue-Greens (#/L): 71988   Greens (#/L): 1609   Diatoms (#/L): 1015   Other Algae (#/L): 1411   Rotifers (#/L): 0   Zooplankton (#/L): 149
 
 

1998

          
Sample Location: Deep Hole
Sample Date: 1998-07-13
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
1998
5.5
0.7
23
8.5
142
8.8
7.34
325
310
117.6
189.3
0.01
0.394
0.03
0.486
15.87
0.022
0.022
0.018
1.128
0.853
1.499
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
25.9
25.9
25.5
23.7
18.8
13.5
10.5
8.9
8
8
7.5
7
6.5
5.8
4.5
4
4
3.9
3.8
3.2
3.2
3.2
3
3
3
3
3
3
DO (mg/L)
11.8
11.3
11.3
8.8
0.7
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.025
0.025
                                                                           
% Water Column Oxic: 11.1
  
Blue-Green Dominance (% of NU): 87
  
          Carlson TSI: 59
                    Indiana TSI: 44
                                                                           
Blue-Greens (#/L): 41872   Greens (#/L): 554   Diatoms (#/L): 792   Other Algae (#/L): 4749   Rotifers (#/L): 317   Zooplankton (#/L): 93.9
 
 

2004

          
Sample Location: Deep Hole
Sample Date: 2004-07-01
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
2004
28.3
0.65
12
8
208
8.8
7.6
385
314.4
156
196
0.024
0.356
0.083
0.323
57.86
0.615
0.669
0.218
1.315
2.073
1.828
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)
27.2
24.8
23.9
23.3
21.7
20.4
16.6
14
12.4
11
10
9.4
9
8.3
7.7
7.1
6.8
6.6
6.3
6.1
5.9
5.8
DO (mg/L)
18.8
19.9
17.5
14.9
3.4
0
0
0
0
0
0
0
0
0
0.9
0.3
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 15
  
Blue-Green Dominance (% of NU): 53.4
  
          Carlson TSI: 68
                    Indiana TSI: 48
                                                                           
Blue-Greens (#/L): 25760   Greens (#/L): 14446   Diatoms (#/L): 6265   Other Algae (#/L): 1548   Rotifers (#/L): 184   Zooplankton (#/L): 75.5
 
 

2006

          
Sample Location: Site 1
Sample Date: 2006-08-07
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
2006
27.4
1.7
12
12.1
108.4
8.7
7.4
381.7
287.5
118
178
0.01
0.32
0.033
0.356
1.92
0.209
0.075
0.07
1.276
1.002
2.502
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)
28.1
28.1
28
28
27.3
22.3
16.9
13
11.1
9.7
9.2
8.8
8.5
8
7.6
7.3
7.1
6.9
6.7
6.5
6.3
6.2
6.1
6.1
6
6
6
6
5.9
DO (mg/L)
8.5
8.5
8.5
8.4
7.2
0.2
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 11
  
Blue-Green Dominance (% of NU): 47.1
  
          Carlson TSI: 48
                    Indiana TSI: 20
                                                                           
Blue-Greens (#/L): 1017   Greens (#/L): 259   Diatoms (#/L): 40   Other Algae (#/L): 518   Rotifers (#/L): 239   Zooplankton (#/L): 85.3
 
 

2006

          
Sample Location: Site 2
Sample Date: 2006-08-07
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
2006
17.8
1.6
10
12.5
106.5
8.7
7.4
383.3
302.4
120
184
0.01
0.328
0.025
0.323
3.72
0.232
0.013
0.027
1.296
1.226
2.446
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)
28.3
28.3
28.2
28.1
27.4
21.8
16.8
13
10.5
9.8
9.2
8.7
8.2
8.1
7.9
7.8
7.7
7.7
7.6
DO (mg/L)
8.3
8.3
8.3
8.2
6.7
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 16.7
  
Blue-Green Dominance (% of NU): 41
  
          Carlson TSI: 49
                    Indiana TSI: 20
                                                                           
Blue-Greens (#/L): 902   Greens (#/L): 264   Diatoms (#/L): 66   Other Algae (#/L): 572   Rotifers (#/L): 352   Zooplankton (#/L): 46.6
 
 

2006

          
Sample Location: Site 3
Sample Date: 2006-08-07
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
2006
14
1.8
13
11.5
104.3
8.8
7.4
382.2
313.7
118.5
188
0.01
0.277
0.03
0.301
3.45
0.288
0.232
0.018
1.627
1.207
2.604
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)
28.3
28.2
28.2
28.2
27.3
23
16.6
13.4
11.1
9.9
9.3
9
8.8
8.5
8.4
8.3
DO (mg/L)
8.1
8.1
8.2
8.1
7
0.9
0.4
0
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 21.4
  
Blue-Green Dominance (% of NU): 36.7
  
          Carlson TSI: 49
                    Indiana TSI: 20
                                                                           
Blue-Greens (#/L): 944   Greens (#/L): 105   Diatoms (#/L): 84   Other Algae (#/L): 1028   Rotifers (#/L): 378   Zooplankton (#/L): 33.8
 
 

2012

          
Sample Location: Deep Hole
Sample Date: 2012-07-12
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
2012
27.6
1.2
22.7
12.5
34.3
8.5
7.4
375.8
258.6
136
187
0.01
0.33
0.019
0.382
9.5
0.026
0.084
0.042
1.751
1.12
2.52
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)
28.5
28.5
28.3
28.3
28.1
25.1
19.9
16.3
12.2
10.3
9.1
8.5
7.5
6.9
6.5
6.3
5.9
5.8
5.5
5.3
5.3
5.2
5.1
5
5
4.9
4.9
4.9
4.9
DO (mg/L)
2.68
2.62
2.65
2.7
2.73
2.88
0.84
0.18
0.05
0.04
0.03
0.03
0.02
0.01
0.02
0.01
0.01
0.01
0
0
0
0
0
0.01
0
0
0
0
0
                                                                           
% Water Column Oxic: 14.8
  
Blue-Green Dominance (% of NU): 91.9
  
Blue-Green Dominance (% of cells): 61.7
           Carlson TSI: 64
                   
                                                                           
Blue-Greens (#/L): 2724091   Greens (#/L): 908032   Diatoms (#/L): 780906   Other Algae (#/L):   Rotifers (#/L): 71   Zooplankton (#/L): 39
Blue-Greens (cells/L): 44566   Greens (cells/L): 2796   Diatoms (cells/L): 1144   Other Algae (cells/L):   Rotifers (cells/L): 0   Zooplankton (cells/L): 0
 
 

2015

          
Sample Location: deep hole
Sample Date: 2015-07-07
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
29.2
1.1
4.94
8.2
8.8
7.4
418
509
167
196
0.01
0.2
0.059
0.252
74.8
0.178
0.013
0.02
1.672
0.999
2.5695
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)
24.82
24.8
24.14
22.97
19.4
15.42
11.9
9.85
8.83
8.32
8
7.63
7.09
6.42
6.04
5.7
5.54
5.38
5.26
5.14
5.06
4.99
4.93
4.87
4.84
4.8
4.78
DO (mg/L)
9.24
10.12
10.1
7.02
2.41
0.95
0.6
0.46
0.37
0.37
0.32
0.31
0.28
0.24
0.21
0.18
0.18
0.18
0.17
0.16
0.19
0.13
0.16
0.15
0.15
0.13
0.15
                                                                           
% Water Column Oxic: 14.29
  
Blue-Green Dominance (% of NU):
 
Blue-Green Dominance (% of cells):
          Carlson TSI: 70
                   
                                                                           
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)