arsenic. There is so much variation in guideline value within different countries and
institutes.
2.4 Guideline value of some countries
Table 4: The national standards of some countries for arsenic in drinking wate
Countries Standards, µg/L Countries Standards, µg/L
Australia (1996) 7 Bangladesh (1997) 50
EU (1998) 10 China 50
Japan (1993) 10 Egypt (1995) 50
Jordan (1991) 10 India 50
Laos (1999) 10 Indonesia (1990) 50
Canada 25 Nepal 50
Mongolia (1998) 10 Philippines (1978) 50
Syria (1994) 10 Srilanka (1983) 50
USA (2001) 10 Viet Nam (1989) 50
( Source: Feroze Ahmed - 2003)
24
, 2.5 Toxicity Rank of Arsenic
As4 (gas)
(Highest toxicity)
Arsenic gas
AsH3 (gas)
T
O
Inorganic arsenic (III)
X
I As2O3 (dust)
C
I
Organic arsenic (III) T
Y FeAsS (pyrite)
O
Inorganic arsenic (V) R
D As4S4
E
R
Organic arsenic (V)
As2S3
Arsonium compounds
Element arsenic
(lowest toxicity)
Figz3: Toxicity Rank
(Source: Lee, 1994)
25
institutes.
2.4 Guideline value of some countries
Table 4: The national standards of some countries for arsenic in drinking wate
Countries Standards, µg/L Countries Standards, µg/L
Australia (1996) 7 Bangladesh (1997) 50
EU (1998) 10 China 50
Japan (1993) 10 Egypt (1995) 50
Jordan (1991) 10 India 50
Laos (1999) 10 Indonesia (1990) 50
Canada 25 Nepal 50
Mongolia (1998) 10 Philippines (1978) 50
Syria (1994) 10 Srilanka (1983) 50
USA (2001) 10 Viet Nam (1989) 50
( Source: Feroze Ahmed - 2003)
24
, 2.5 Toxicity Rank of Arsenic
As4 (gas)
(Highest toxicity)
Arsenic gas
AsH3 (gas)
T
O
Inorganic arsenic (III)
X
I As2O3 (dust)
C
I
Organic arsenic (III) T
Y FeAsS (pyrite)
O
Inorganic arsenic (V) R
D As4S4
E
R
Organic arsenic (V)
As2S3
Arsonium compounds
Element arsenic
(lowest toxicity)
Figz3: Toxicity Rank
(Source: Lee, 1994)
25
