| The limit of acceptable substances or drinking water features | Maximum acceptable limit of toxic substances in drinking water | Acceptable limit of chemical substances in drinking water | |||
| Parameter | Concentration or value limits | Parameter | Concentration or value limits | Parameter | Concentration or value limits |
| Smell | Pronounced | Arsenic (As) | 0.05 mg/l | Iron (Fe) | 0.2 mg/l |
| Color | 100 unit | Barium (Ba) | 1.00 mg/l | Magnesium (Mg) | 50 mg/l |
| Blur | 250 ppm in SO2 | Cadmium (Cd) | 0.01 mg/l | Manganese (Mn) | 0.5 mg/l |
| Ammonia (NH4) | 0.5 mg/l | Cyanide (CN) | 0.05 mg/l | Copper (Cu) | 0.1 mg/l |
| Copper (Cu) | 1 mg/l | Chromium (Cr6) | 0.05 mg/l | Zinc (Zn) | 5 mg/l |
| Zinc (Zn) | 5 mg/l | Bullet (Pb) | 0.05 mg/l | Chloride (Cl−) | 250 mg/l |
| Bullet (Pb) | 0.05 mg/l | Selenium (Se) | 0.01 mg/l | Fluoride (F−) | 1 mg/l |
| Cadmium (Cd) | 0.005 mg/l | Should also check the presence of these substances: mercury, vanady, molybdenum and silver. Conversely need to make sure that the concentration of organic substances extracted by chloroform (ECC), as polycyclic aromatic hydrocarbons it should not exceed 0.2 mg/l and not have the presence of pesticides.
| Nitrates (NO3) | 50 mg/l | |
| Arsenic (As) | 0.05 mg/l | Sulfate (SO4) | 250 mg/l | ||
| Chrome (Cr6) | 0.01 mg/l | Detergents (ABS) | 0.3 mg/l | ||
| Selenium (Se) | 0.05 mg/l | Phenolic compounds (phenol) | 0.0001 mg/l | ||
| Cyanide (CN−) | 1 mg/l | ||||
| Fluoride (F−) | 0.5 g/l |
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| Detergents (ABS) | 0.3 mg/l |
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| pH | 6 - 8.5 |
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| BOD | 10 |
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| COD | 30 |
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| Nitrates (NO3) | 50 mg/l |
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| Nitrates (NO2) | 0.1 mg/l |
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