Water Quality
Ambient Water Quality Criteria for Fluoride
Table
5.11 Percent Mortality of Catla catla fry at various
Fluoride Levels
[F]-mg/L
|
hours
of exposure
|
-(pH)
|
1
|
4
|
8
|
12
|
16
|
20
|
24
|
28
|
[13]-(7.1)
|
0
|
0
|
0
|
0
|
5*
|
10*
|
15*
|
20*
|
[26]-(6.7)
|
20*
|
25*
|
30
|
65
|
70
|
75
|
85
|
98
|
[39]-(6.7)
|
30*
|
40*
|
80*
|
92
|
100
|
100
|
100
|
100
|
[52]-(5.9)
|
60*
|
90*
|
90*
|
100
|
100
|
100
|
100
|
100
|
[65]-(5.8)
|
70*
|
95*
|
95*
|
100
|
100
|
100
|
100
|
100
|
[78]-(5.3)
|
75*
|
95*
|
100
|
100
|
100
|
100
|
100
|
100
|
[91]-(4.9)
|
80*
|
95*
|
100
|
100
|
100
|
100
|
100
|
100
|
[104]-(4.6)
|
100
|
100
|
100
|
100
|
100
|
100
|
100
|
100
|
[117]-(4.1)
|
100
|
100
|
100
|
100
|
100
|
100
|
100
|
100
|
[130]-(4.1)
|
100
|
100
|
100
|
100
|
100
|
100
|
100
|
100
|
LC50
|
42.3
|
40.3
|
34.2
|
29.7
|
28.7
|
26.2
|
24.6
|
23.4
|
[F]
in mg/L
|
hours
of exposure
|
| |
24
|
48
|
72
|
96
|
<0.6
|
0
|
0
|
0
|
0
|
1.2
|
0
|
0
|
0
|
10
|
2.5
|
0
|
0
|
20
|
40*
|
4.3
|
0
|
18.3
|
20*
|
60*
|
7.2
|
18.3
|
30*
|
45*
|
71.7
|
13.2
|
23.3
|
50*
|
65*
|
96.7
|
LC50
|
24.6
|
11.5
|
7.2
|
4.8
|
pH
7.0-7.3, fry 2.5-4.0 cm, 900-1200 mg., DO 5.6-6.5, 37°C *estimated values by
interpolation from the graph, reference (Pillai & Mane, 1985)
