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WHO standards
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EU standards
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1993 |
1998 |
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Suspended solids |
No guideline
|
Not mentioned
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COD |
No guideline
|
Not mentioned
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BOD |
No guideline
|
Not mentioned
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Oxidisability |
|
5.0 mg/l O2
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Grease/oil |
No guideline
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Not mentioned
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Turbidity |
No guideline |
<5 |
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pH |
No guideline |
6.5 - 8.5
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Conductivity |
250 microS/cm
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250 microS/cm
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Color Pt-Co |
No guideline
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15
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Dissolved oxygen |
No guideline
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>75% sat
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Hardness CaCO3 |
No guideline |
150 - 500
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TDS |
No guideline
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Not mentioned
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cations
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(positive ions) |
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Aluminium (Al) |
0.2 mg/l
|
0.2 mg/l
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Ammonia (NH4) |
No guideline
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0.50 mg/l
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Antimony (Sb) |
0.005 mg/l
|
0.005 mg/l
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Arsenic (As) |
0.01 mg/l
|
0.01 mg/l
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Barium (Ba) |
0.3 mg/l
|
Not mentioned
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Berillium (Be) |
No guideline
|
Not mentioned
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Boron (B) |
0.3 mg/l
|
1.00 mg/l
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Bromate (Br) |
Not mentioned
|
0.01 mg/l
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Cadmium (Cd) |
0.003 mg/l
|
0.005 mg/l
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Chromium (Cr) |
0.05 mg/l
|
0.05 mg/l
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Copper (Cu) |
2 mg/l
|
2.0 mg/l
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Iron (Fe) |
No guideline(6)
|
0.2 |
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Lead (Pb) |
0.01 mg/l
|
0.01 mg/l
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Manganese
(Mn) |
0.5 mg/l
|
0.05 mg/l
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Mercury (Hg) |
0.001 mg/l
|
0.001 mg/l
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Molibdenum
(Mo) |
0.07 mg/l
|
Not mentioned
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Nickel (Ni)
|
0.02 mg/l
|
0.02 mg/l
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Nitrogen (total N) |
50 mg/l
|
Not mentioned
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Selenium
(Se) |
0.01 mg/l
|
0.01 mg/l
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Silver (Ag) |
No guideline
|
Not mentioned
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Sodium (Na) |
200 mg/l
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200 mg/l
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Tin (Sn) inorganic |
No guideline
|
Not mentioned
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Uranium (U)
|
1.4 mg/l
|
Not mentioned
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Zinc (Zn) |
3 mg/l
|
Not mentioned
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anions
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(negative ions) |
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Chloride (Cl) |
250 mg/l
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250 mg/l
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Cyanide (CN)
|
0.07 mg/l
|
0.05 mg/l
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Fluoride (F) |
1.5 mg/l
|
1.5 mg/l
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Sulfate (SO4) |
500 mg/l
|
250 mg/l
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Nitrate (NO3) |
(See Nitrogen)
|
50 mg/l
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Nitrite
(NO2) |
(See Nitrogen)
|
0.50 mg/l
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microbiological
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parameters
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Escherichia coli |
Not
mentioned |
0
in 250 ml |
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Enterococci |
Not mentioned
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0 in 250 ml
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Pseudomonas
aeruginosa |
Not mentioned
|
0 in 250 ml
|
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Clostridium
perfringens |
Not mentioned |
0 in 100 ml
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Coliform bacteria |
Not mentioned
|
0 in 100 ml
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Colony count 22oC |
Not mentioned
|
100/ml
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Colony count 37oC |
Not mentioned
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20/ml |
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other parameters
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Acrylamide |
Not mentioned
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0.0001 mg/l
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Benzene (C6H6) |
Not mentioned
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0.001 mg/l
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Benzo(a)pyrene |
Not mentioned
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0.00001 mg/l
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Chlorine dioxide (ClO2) |
0.4 mg/l
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1,2-dichloroethane |
Not mentioned
|
0.003 mg/l
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Epichlorohydrin |
Not mentioned
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0.0001 mg/l
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Pesticides
|
Not mentioned
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0.0001 mg/l
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Pesticides - Total |
Not mentioned
|
0.0005 mg/l
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PAHs |
Not mentioned
|
0.0001 mg/l
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Tetrachloroethene |
Not mentioned
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0.01 mg/l
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Trichloroethene |
Not mentioned
|
0.01 mg/l
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Trihalomethanes |
Not mentioned
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0.1 mg/l
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Tritium (H3) |
Not mentioned
|
100 Bq/l
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Vinyl chloride |
Not mentioned
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0.0005 mg/l
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(1) Desirable: Less than
5 NTU
(2) Desirable: 6.5-8.5
(3) Desirable: 15 mg/l Pt-Co
(4) Desirable: less than 75% of the saturation concentration
(5)
Desirable: 150-500 mg/l
(6) Desirable: 0.3 mg/l
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