Secondary Disinfection Reduced Maintenance Flushing Savings

Secondary disinfection of our water supply system has resulted in enhanced water quality and it exceeds federal water quality standards as reported to our water users in the recently released annual Water Quality Confidence Report. Customer complaints with regard to odors and inconsistent water quality as observed due to varying levels of turbidity have ceased. While the water supply system requires constant monitoring and maintenance, the volume of water needed to cleanse the system has been dramatically reduced.

Prior to the installation of the secondary disinfection system, the “shelf life” of water in our storage and distribution system was very short. Our water supply would degrade by becoming murky or cloudy due to the growth of bacteria and other organisms within the storage and distribution system. The only means available to cleanse the system of these contaminants was to aggressively flush the storage and distribution system.

Prior to the installation of the secondary disinfection system, the City consumed over the last six years an average of 17.5 million gallons of water flushing the storage and distribution part of the system. After installation of the secondary disinfection system, maintenance flushing has dropped to 5 million gallons per year (a reduction of 67%). These savings are comparable to two days of water use for the entire City of Woodburn.

Not only are we doing a better job of conserving this very precious resource we call water, the City has significantly reduced the amount of energy it consumes in providing water to its customers by about $28,000 per year. There are both financial and environmental enhancement benefits with the reduction in energy required to provide safe and high quality water to citizens of Woodburn.

The City is providing improved water quality, more consistent water quality, water resource conservation, energy savings, a smaller our carbon footprint and higher customer satisfaction, all made possible by implementing secondary disinfection to our water treatment system.

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