Clean Lakes Program: Loon - Kosciusko County

 

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Indiana Clean Lakes Program Lake Report

Loon

 

Kosciusko County

1991

         
Sample Location: Deep Hole
Sample Date: 1991-08-26
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
1991
12.2
1
21
10
129.4
8.6
7
410
409
116.3
213.3
0.01
0.541
0.042
0.588
0.839
1.458
0.037
5.301
1.943
7.202
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)
27.5
25
23
20
16
13
11
10
10
10
DO (mg/L)
10.4
10.4
4.5
0.6
0.3
0.25
0.25
0.2
0.15
0.15
                                                                           
% Water Column Oxic: 100
 
Blue-Green Dominance (% of NU): 42
 
          Carlson TSI: 59
                    Indiana TSI: 31
                                                                           
Blue-Greens (#/L): 1346   Greens (#/L): 949   Diatoms (#/L): 31   Other Algae (#/L): 92   Rotifers (#/L): 0   Zooplankton (#/L): 772
 
 

1994

         
Sample Location: Deep Hole
Sample Date: 1994-08-22
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
1994
12.5
1.5
17
12
101
8.6
7.7
370
355
138.7
226.3
0.01
0.715
0.01
0.708
9.08
0.022
0.022
0.049
5.322
0.794
5.952
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
24.5
24
24
23.5
21
15
12
10
9
9
8.5
8.5
DO (mg/L)
8.3
8.6
8.5
7.9
7.7
0.7
0.1
0.1
0.1
0
0
0
0
                                                                           
% Water Column Oxic: 38
 
Blue-Green Dominance (% of NU): 30
 
          Carlson TSI: 48
                    Indiana TSI: 27
                                                                           
Blue-Greens (#/L): 705   Greens (#/L): 495   Diatoms (#/L): 148   Other Algae (#/L): 841   Rotifers (#/L): 0   Zooplankton (#/L): 127
 
 

1998

         
Sample Location: Deep Hole
Sample Date: 1998-08-10
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
12.5
0.9
15
7.25
102
8.51
7.16
306.4
329
105
212.2
0.01
0.548
0.048
0.556
15.87
0.022
0.022
0.021
1.069
1.552
6.537
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)
27.8
26.1
25.8
25.3
24.3
19.7
14.8
11.6
10.2
9.6
8.8
8.7
8.6
8.5
DO (mg/L)
9.62
8.73
8.15
7.07
2.5
0
0
0
0
0
0
0
0
0
                                                                           
% Water Column Oxic: 25
 
Blue-Green Dominance (% of NU): 81
 
          Carlson TSI: 60
                    Indiana TSI: 41
                                                                           
Blue-Greens (#/L): 19086   Greens (#/L): 364   Diatoms (#/L): 2295   Other Algae (#/L): 1421   Rotifers (#/L): 182   Zooplankton (#/L): 142.6
 
 

2008

         
Sample Location: Deep Hole
Sample Date: 2008-07-17
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
2008
12
0.9
13
8.5
132.7
9
7.1
338
415
130
180
0.01
0.432
0.034
0.526
12.48
0.013
0.013
0.149
4.259
1.394
6.461
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)
30.5
28.9
28.9
27.8
23.5
19
12.7
9.5
8
7.7
7.3
DO (mg/L)
10.5
10.3
10.3
10.3
4.3
2.1
0.7
0.6
0.6
0.5
0.5
0.5
                                                                           
% Water Column Oxic: 33.3
 
Blue-Green Dominance (% of NU): 70.7
 
          Carlson TSI: 57
                    Indiana TSI: 43
                                                                           
Blue-Greens (#/L): 10849   Greens (#/L): 2084   Diatoms (#/L): 1078   Other Algae (#/L): 1221   Rotifers (#/L): 82   Zooplankton (#/L): 52.2
 
 

 

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)