Water Quality
Ambient Water Quality Criteria for Fluoride
Table 5.14 Time in Hours
to Initial and Final Deaths of Rainbow Trout at
several Temperatures and Fluoride levels (Angelovic et al.,
1961a)(time
was only recorded in blocks of 8 hours)
fluoride
in mg/L
|
time
of
deaths
|
@
7.2°C
|
@
12.7°C
|
@
18.3°C
|
@
23.8°C
|
time & *
fluoride
|
0
|
first
|
234
|
196
|
150
|
16
|
149
|
0
|
last
|
234
|
204
|
186
|
28
|
163
|
| |
|
|
|
|
|
|
2
|
first
|
198
|
184
|
120
|
18
|
130
|
2
|
last
|
232
|
228
|
174
|
52
|
172
|
| |
|
|
|
|
|
|
4
|
first
|
126
|
108
|
90
|
14
|
84
|
4
|
last
|
170
|
144
|
150
|
22
|
120
|
| |
|
|
|
|
|
|
7
|
first
|
72
|
52
|
84
|
14
|
56
|
7
|
last
|
180
|
124
|
l10
|
22
|
l09
|
| |
|
|
|
|
|
|
13
|
first
|
48
|
40
|
32
|
l0
|
32
|
13
|
last
|
96
|
76
|
118
|
18
|
77
|
| |
|
|
|
|
|
|
25
|
first
|
26
|
36
|
32
|
l0
|
26
|
25
|
last
|
86
|
58
|
54
|
18
|
54
|
Time & Temperature**
|
117
|
103
|
85
|
14
|
|
Increasing
Fluoride at any temperature causes earlier mortality; increasing
temperature at any Fluoride causes earlier mortality, at a
constant low hardness.
* Time/Fluoride: This
is the mean time to first and last deaths at a fixed fluoride
level regardless of the temperature.
** Time/Temperature:
This is the mean time to death at a fixed temperature regardless
of the fluoride concentration.
