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Recent Cryptosporidium Detections in Portland Bull Run Water

City of Lake Oswego Water Intake on Clackamas River

The Portland Water Bureau recently detected the presence of Cryptosporidium, a potential pathogenic microorganism, in several samples collected at their Bull Run intake in January and February, 2017.

Although our water systems are close to Portland’s, the City of Lake Oswego and Tigard Water Service Area customers receive their drinking water from a different source and the treatment process is also different than Portland’s. Lake Oswego and Tigard Water Service Area’s primary water source is the Clackamas River. The recently upgraded filtration system at our water treatment plant removes Cryptosporidium and pathogens that may be detected in the Clackamas River water supply. Ozone, a powerful oxidant, also provides an additional treatment barrier to protect public health. 

Read more about Lake Oswego's high-quality drinking water and water treatment.