Residents of Cambridge West must prepare for a big flush to change the method of disinfecting water

Some Cambridge residents have been told to stockpile water in preparation for a big flush.

The city says that between May 11 and 12, water lines in the west area of ​​the city will be flushed in preparation for the change from chlorine to chloramines. The change was previously communicated in a letter to residents of the affected area with their February 2022 water bill.

During flushing, residents are asked to store water the night before for drinking and cooking. The city says this is a precautionary measure to “avoid some of the potential results that may occur during the conversion process, such as discoloration and taste.”

Disinfection levels will continue to be monitored as required by legislation, the city says.

Residents may notice temporary discoloration of tap water. If the water is discolored, open a cold water faucet closest to the water meter and let it run slowly until it runs clear. Do not drink discolored water.

Additionally, the city says there may be a slight change in the taste of tap water, which it says is normal when changing disinfection methods.

The majority of residents won’t be affected by the switch to chloramination, the city says, but kidney dialysis patients and owners of fish, reptiles and amphibians should be “careful” with chloraminated water.

The city noted that residents on dialysis should contact their doctor or healthcare professional for more information. Additionally, fish, aquarium, and pond owners should be aware that, like chlorine, chloramines must be removed from tap water before use in aquariums and ponds.

Chloramine can be removed from water with inexpensive water treatment products (drops or tablets) or specified carbon filters. These products are readily available at most local pet supply stores.

Residents can learn more about their drinking water on the region’s website at

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