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: : LEARN ABOUT WATER / DRINKING WATER QUALITY : :

Only a finite quality of fresh water is available on earth. Nature's hydrological water cycle strives relentlessly to replenish the supply
but soclety is constantly polluting this water and our drinking water may no longer be regarded as dependably wholesome.

Absolutely pure water now rarely occurs naturally.

Ideally drinking water should be wholesome, physically attractive, free from all harmful bacteria and have a chemical content which will promote the health of the consumer.

DRINKING WATER QUALITY STANDARDS FOR WHO& MINISTRY OF HEALTH MALAYSIA

No.	Parameter	W.H.O. Standard*	M.O. H Standard*
1.	pH	< 8.0	6.5-9.0
2.	Colour (Hazen Unit)	15 TCU	15 TCU
3.	Turbidity (NTU)	5 NTU	5 NTU
4.	Total Alkalinity (as CaCO3 ), mg/l	No Spec	No Spec
5.	Total Hardness (as CaCO3), mg/l	500.0	500.0
6.	Calcium Hardness (as CaCO3), mg/l	200.0	No Spec
7.	Magnesium Hardness (as CaCO3), mg/l	150.0	150.0
8.	Total Solids, mg/l	-	No Spec
9.	Dissolved Solids, mg/l	1000	1000
10.	Suspended Solids, mg/l	No Spec	No Spec
11.	Anionic Detergents, mg/l	1	1.0
12.	Chloride (as CI), mg/l	250.0	250.0
13.	Sulphate (as SO4), mg/l	250.0	250.0
14.	Selenium (as Se), mg/l	0.01	0.01
15.	Mercury (as Hg), mg/l	0.001	0.001
16.	Cyanide (as CN), mg/l	0.07	0.07
17.	Phenol, mg/l	0.002	0.002
18.	Arsenic (as As), mg/l	0.01	0.01
19.	Silica (as SiO2)	-	No Spec
20.	Total Iron (as Fe), mg/l	0.3	0.3
21.	Copper (as Cu), mg/l	2	1.0
22.	Manganese (as Mn), mg/l	0.1	0.1
23.	Lead (as Pb), mg/l	0.01	0.01
24.	Zinc (as Zn), mg/l	3.0	3.0
25.	Cadmium (as Cd), mg/l	0.003	0.003
26.	Calcium (as Ca). mg/l	200	No Spec
27.	Magnesium (as Mg), mg/l	150.0	150.0
28.	Nitrate Nitrogen (as N), mg/l	10.0	10.0
29.	Ammoniacal Nitrogen (as N), mg/l	-	No Spec
30.	Albuminoid Nitrogen (as N), mg/l	-	No Spec
31.	Oil & Grease, mg/l 0.3	-	No Spec
32.	Fluoride (as F)	1.5	0.5-0.7
33.	Aluminium (AI), mg/l	0.2	0.2
34.	Silver (as Ag)	No Spec	0.05
35.	Chromium (as Cr)	0.05	0.05
36.	Sodium (as Na)	200	200.0
37.	Mineral Oil	0.3	-
38.	Free Chlorine (as CI2)	-	Not Less Than 0.2
39.	Coliform Count, org/ml	Must Not Be Detectable In Any 100ml Sample	Must Not Be Detected In Any 100ml Sample
40.	E.coli Count, org/ml	Must Not Be Detectable In Any 100ml Sample	Absent In 100ml Sample

* MINISTRY OF HEALTH MALAYSIA
* WORLD HEALTH ORGANISATION