Waste water from industrial plants Waste water from factories of tasa and include wastewater from cooling systems, production systems. Residential buildings and the Shops and cafeteria Substances that may be confused as an organic acid, alkaline inorganic compounds. Various chemicals. Radioactive substances Toxic substances Clay, sand and other sewage which when left in the River, canals, increase the quantity of those substances or toxic to the living organisms in the water. A foul rotten birth color. The smell
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