Portland Water Bureau Confirms Cryptosporidium in Bull Run Watershed, No Immediate Public Health Precautions Required

The Bull Run Watershed intake, Portland’s main source of drinking water, has been confirmed to contain amounts of Cryptosporidium, the Portland Water Bureau has alerted the public to. One Cryptosporidium oocyst was found in samples collected on November 18 and 19, while none was found in samples collected on November 17 and 20, according to a statement from the Portland Water Bureau. On November 12, 2024, a previous detection was made.

The agency has also declared that, in accordance with drinking water laws, it must begin treating Cryptosporidium, even though it does not currently do so. Portland is attempting to swiftly install a filtration system in order to remedy the issue; the system is expected to be finished by September 30, 2027. Increased monitoring and improved watershed protection are examples of temporary solutions in the interim. The public does not yet require any special measures, according to public health professionals.

The CDC states that while the majority of healthy individuals will recover from Cryptosporidium exposure without therapy, those with compromised immune systems, such as those with AIDS, cancer patients, and transplant recipients on immunosuppressive medications, may fall ill more severely. In accordance with the Environmental Protection Agency’s recommendation, the Portland Water Bureau has advised its immunocompromised customers to speak with their healthcare provider on the safety of drinking Bull Run Watershed tap water.

For the most recent information, residents who are worried about their water should consult the sampling results that are posted on the city’s website. If further testing reveals a public health risk that calls for measures, the Portland Water Bureau’s dedication to openness will guarantee that the public and media are promptly informed. Customers can call the Water Quality Line at 503-823-7525 for more detailed questions.

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