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Brown distributing invoices online7/30/2023 This adjustment has been very successful. This was done to lower the trihalomethane levels. In September of 1999 ammonia was added to change the secondary disinfectant to from free chlorine to chloramines.This treatment also reduces taste and odors and very effectively inactivates virus and cysts. This was done to remove the manganese which caused brown water. In May of 1997 an ozone generating and feed system was installed.In December of 1992 fluoridation of the water supply began.In the 1987 sodium hydroxide was replaced with potassium hydroxide and in January 2009 a switch was made back to sodium hydroxide.This lowered cost and reduced sludge volume. In the 1979 the powdered activated carbon applied in the pretreatment was replaced by changing the filter media from anthracite coal to granular activated carbon.Over the years some of the processes have changed, such as: The new Water Treatment Plant uses the same processes and has the same capacity as the old plant. On May 18, 2006, the old Water Treatment Plant on Boston Road was taken off line and the new Water Treatment Plant, located off Treble Cove Road, continued servicing the town. As growth in town continued the plant's capacity was again increased in 1976, this time to 14 MGD. ![]() In 1967 the plant was expanded to its intended maximum capacity. As originally built it had a capacity of 3.5 million gallons per day (MGD) and was intended to be expanded to 7 MGD at a later time. The first Water Treatment Plant (WTP) was built in 1955. Water was at that time drawn from wells located in the area of the present Water Treatment Plant, where the original pumping station building remains. ![]() The water works was first activated in January of 1899. Construction of the original works began in 1898 and continued for several years. Billerica Water Works was established by an act of the Massachusetts Legislature in 1897.
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