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To enhance water quality monitoring in a drinking water network sampling stations are installed along the route of a water network. Water sampling stations are connected to next water main and have a little sink. Water samples are analyzed for bacteria, chlorine levels, pH, inorganic and organic pollutants, turbidity, odor, and many other water quality indicators.New York City has over 800 sampling stations that are distributed based on population density, water pressure zones, proximity to water mains, and accessibility. The stations rise about 4 feet above the ground and are made of heavy cast iron.