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The Longmeadow Water Department reports that the locational running annual average (LRAA) concentration for total haloacetic acids (HAA5s) for the Berkshire Bank monitoring site was 64.9 micrograms per liter (mg/L) in the monitoring period from January 1, 2017 to December 31, 2017. For the same site, the LRAA for the four quarters between April 1, 2017 and March 31, 2018 is 62.7 mg/L. These concentrations exceed the Massachusetts drinking water standard, or Maximum Contaminant Level (MCL), of 60 mg/L. Where disinfection is used in the treatment of drinking water, disinfectants combine with organic and inorganic matter present in water to form disinfection byproducts, such as HAA5s.
This was not an emergency. If it had been, the Longmeadow Water Department would have provided notification to customers immediately. Some people who drink water containing HAA5s in excess of the MCL over many years may have an increased risk of getting cancer.
The Longmeadow Water Department is working with Springfield Water and Sewer Commission on its water treatment methods and will evaluate options for Longmeadow operations to reduce disinfection byproducts.
For more information, contact Peter Thurber at 413-567-3400 or LWD, 31 Pondside Road, Longmeadow, MA 01106.