Water Quality
Ambient Water Quality Criteria for Fluoride
Table
4.2 Temperature Dependence
of Fluoride Limits in Drinking Water
Annual
Mean Air
Temperature
|
Recommended
Fluoride Limits in mg/L
|
°F*
|
°C
|
Lower
|
Optimum
|
Upper
|
Maximum
|
50.0
to 53.7
|
10.0
to 12.0
|
0.9
|
1.2
|
1.7
|
2.4
|
53.8
to 58.3
|
12.1
to 14.6
|
0.8
|
1.1
|
1.5
|
2.2
|
58.4
to 63.8
|
14.7
to 17.5
|
0.8
|
1.0
|
1.3
|
2.0
|
63.9
to 70.6
|
17.7
to 21.4
|
0.7
|
0.9
|
1.2
|
1.8
|
70.7
to 79.2
|
21.5
to 26.2
|
0.7
|
0.8
|
1.0
|
1.6
|
79.3
to 90.5
|
26.3
to 32.5
|
0.6
|
0.7
|
0.8
|
1.4
|
References: Lower and Optimum-(Anon (USPHS), 1962), Upper-(Anon
(NAS), 1971a; Anon (BC), 1969; Anon (Alaska), 1982)
Maximum-(Anon (EPA), 1975; Anon (AWWA), 1978; Anon (EPA), 1973; Anon (Idaho), 1980)
*Reference 8 rounds
off the temperatures as: 50 to 54°F, 55 to 58°F, 59 to 64°F, 65 to 71°F, 72 to 79°F and 80 to 91°F.
