Water Quality
Ambient Water Quality Criteria for Fluoride
Table
5.4 Recommended Acute Toxicity
Test Medium for Aquatic Organisms (Anon, 1975)
|
NaHCO3
|
CaSO4.2H2O
|
MgSO4
|
KCl
|
pH
|
|
alkalinity
|
very
soft
|
12
|
7.5
|
7.5
|
0.5
|
6.4-6.8
|
10-13
|
10-13
|
soft
|
48
|
30.0
|
30.0
|
2.0
|
7.2-7.6
|
40-48
|
30-35
|
hard
|
192
|
120.0
|
120.0
|
8.0
|
7.6-8.0
|
160-180
|
110-120
|
very
hard
|
384
|
240.0
|
240.0
|
16.0
|
8.0-8.4
|
280-320
|
225-245
|
When references did
not give actual hardness values but only referred to the water
as hard or soft, then hardness values were estimated using
this table as a guide.
