Chicopee Water Department (MWRA)

This is added to Chicopee's drinking water for sterilization. Note that cleansing is the end of pathogenic infection-causing creatures just, where disinfection is the finished end of every living being. Chlorine levels in the treatment plant completion water are around 1.0 to 1.4 mg/L free chlorine. Less chlorine is required during the colder months of the year to keep up lingering at the further limits of the framework. Our all year target is 0.2 mg/L free chlorine at the farthest focuses on the framework. Utilization ranges from 10 to 50 pounds for each day, depending principally on water temperature and use. Chicopee's water is additionally sanitized with Sodium Hypochlorite (fade) at the Ware Disinfection Facility in Ware, Massachusetts before it comes to Chicopee. The portion leaving the office has run from 1.2 to 1.6 mg/L in the course of recent years. This water moves through the Chicopee Valley Aqueduct (CVA) to Chicopee, Wilbraham, and Fire District 1 of South Hadley. At the point when the water comes to Chicopee, the chlorine remaining is around 0.5 to 0.6 mg/L free chlorine before it is expanded to a level that will guarantee cleaning of the City's circulation framework. Sodium Bicarbonate (Baking Soda) NaHCO3 This is added to Chicopee's drinking water basically to expand the water's alkalinity, along these lines lessening its destructiveness. Alkalinity is an estimation of the buffering limit (obstruction in pH change) of water. Sodium Bicarbonate will build the pH of the water too, however, significantly more is expected to expand it when contrasted with Sodium Carbonate. The use is approx. 800 - 2,000 pounds for every day relying upon season, stream, and so on. Sodium Bicarbonate expansion is balanced so that there is alkalinity after treatment of 25 - 30 mg/L. The water before treatment has an alkalinity of around 5 mg/L. Sodium Carbonate (Soda Ash) Na2CO3 This is added to Chicopee's drinking water to build the water's pH. It will likewise build the water's alkalinity however on the off chance that solitary sodium carbonate was utilized, our focused on pH would become too far before our expected alkalinity. The crude water pH is approx. 7.0 and after treatment with Sodium Carbonate and Sodium Bicarbonate the completion water pH is approx. 8.0. This pH alteration alongside an expansion in alkalinity lessens the water's destructiveness. Utilization is surmised 50 - 140 pounds for each day. Sodium Hexametaphosphate (Polyphosphate) This substance is used to decrease red water issues brought about by iron water mains. It doesn't expel the iron from the water, however, prevents it from oxidizing to the noticeable red state (rust). Subsequently, the iron is still there, however in a dry structure. This concoction procedure is known as sequestering. As the water experiences the conveyance framework, a portion of this polyphosphate additionally returns to orthophosphate. Utilization is roughly 50 - 80 pounds for each day and is changed by keep up a completion water phosphate portion (when joined with Monosodium Phosphate) of around 2.0 mg/L all out phosphate and 1.0 mg/L orthophosphate. Monosodium Phosphate (Orthophosphate) NaH2PO4 This substance is fundamentally used to lessen lead and copper in drinking water. It leaves a defensive film (testimony of phosphate mixes) within the surface of channels giving a hindrance between the water and the pipe, in this manner diminishing erosion. This sort of erosion control is called passivation. Usage is around 50 - 80 pounds for every day and is changed by keeping up a completion water phosphate portion (when joined with Sodium Hexametaphosphate) of approx. 2.0 mg/L absolute phosphate and 1.0 mg/L orthophosphate. Note: The mixing of these 2 phosphates has been found to lessen copper erosion superior to either type can independently..

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