The 3 Hours of time frame ...

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The 3 Hours of time frame justifies the improper water treatment, especially filtration. Write a letter to the Nagar Palika Parishad stating that "Due to improper Clarification and Filtration, after 3 hours of retention, precipitation occurs. Please ensure appropriate coagulant and flocculant dose with proper backwashing of the Pressure Sand Filters. Also, there seems to be the utilization of substandard dosing chemicals which may be causing the coagulation of impurities present in water. Please take apporpiate measure. Your quick response will be highly appriciated."