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Posted on: February 6, 2020

Chlorination of Potable Water System

It is typical for cities to chlorinate the water systems to protect public health and most cities chlorinate their system continually throughout the year. Many of us have visited neighboring cities or perhaps taken a vacation and notice the taste and the smell of chlorine in the water. In Riverbank, we are fortunate to have good groundwater and although groundwater is not required to be chlorinated City staff will perform this process as a precautionary measure (when needed).

During the last few weeks in January, the City ran a low dose, low residual chlorination of the potable water system this was done as a precautionary measure because two City wells were undergoing maintenance work. Several residents have had concerns about the amount of chlorination; the City has main an average of fewer than 0.8 parts per million (ppm) throughout this routine maintenance period (the State of California’s standard maximum level is 4.0 ppm). 

Our Public Works Director Michael Riddell understands that there residents concerned and that they have questions about this process; he encourages those that are concerned about the chlorination to contact him directly either via email at or via phone at 209-869-7128.

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