| 1 | Free residual chlorine | Chlorine is the most commonly used disinfectant. Affect the taste of water. |      |
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| 2 | Turbidity | Is a measure of the cloudiness of water; an indication water quality and filtration effectiveness. Particles in water that may not be visible | |
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| 3 | Trihalomethanes | General term of for four chemical compounds(chloroform, bromodichloromethane, dibromochloromethane, bromoform) generated by the reaction of organic substances in water to chlorine used in water filtration treatments, Suspected of being carcinogenic. | |
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| 4 | Chloroform | One of trihalomethanes, Suspected of being carcinogenic. | |
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| 5 | Bromodichloromethane | One of trihalomethanes, Suspected of being carcinogenic. | |
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| 6 | Dibromochloromethane | One of trihalomethanes, Suspected of being carcinogenic. | |
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| 7 | Bromoform | One of trihalomethanes, Suspected of being carcinogenic. | |
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| 8 | Lead | Perceived as a problem because there is a possibility of causing intellectual damage to infants and babies if it is accumulated in their mothers. | |
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| 9 | CAT | Organic chemicals, herbicides, pesticides used in a number of crops (agricultural or gardens) as well as non-crop areas, It is suspected of disrupt the endocrine (hormones) system. | |
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| 10 | 2-MIB | A mold. It affects the taste of water. | |
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| 11 | Tetrachloroethylene | Is widely used as in drycleaning; and as solvent for degreasing metals in automotive, metal, light industries. It is suspected to harm liver and kidney, a carcinogen. | |
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| 12 | Trichloroethylene | Is a chemical compound used as a industrial solvent for degreasing metals. It is suspected to harm liver and kidney, and be a carcinogen. | |
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| 13 | 1,1,1-trichloroethane | Is widely used as a cleaning solvent in electrical, electronics industry, as a solvent for adhesives, ink, paints, coatings, textile dyes, as a coolant, lubricant. It is suspected to harm the liver and kidney and be a carcinogen. | |
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