The cities of Tigard and Lake Oswego, OR will use conventional drinking water treatment plus ozone to best meet their future water treatment needs. This is the first phase of planning for an expansion of the city’s water supply through a water partnership with Tigard. Initially 18 different water treatment technologies were examined for social, environmental and economic benefits.
Ozone was recommended because it is capable of addressing emerging concerns about currently unregulated contaminants. It was determined that adding ozone as an additional treatment barrier would best protect public health in the long term. Ozone would pro actively ensure the best taste year round and would reduce the amount of chlorine used for disinfection, among other benefits.
The cities plan on beginning the system upgrades in the 2012-2013 fiscal year.