Portland residents might want to keep an eye on their tap water as the Portland Water Bureau reports finding traces of Cryptosporidium in the city's primary drinking water source. Recent tests from December 7 to December 10 detected the microscopic parasite in the Bull Run Watershed. Samples from December 7 and December 9 each turned up one Cryptosporidium oocyst in the 50 liters tested. Fortunately, none were found in samples from December 8 and December 10, according to the City of Portland.
The potential for concern arises from the fact that Cryptosporidium can lead to cryptosporidiosis, an illness that causes symptoms like diarrhea, vomiting, and stomach pain. While the general population may not need to start rapidly boiling all their drinking water or stockpile bottled water just yet, the presence of the parasite is a more pressing issue for people with compromised immune systems. They're advised to consult with their healthcare provider on whether they should continue to drink tap water, as per the City of Portland.
The Water Bureau currently doesn't treat for Cryptosporidium, but has a plan in place to install filtration by September 2027. In the interim, they're working on watershed protection and increased monitoring. A statement on their website assures that "customers do not need to take any additional precautions" for now, though the situation is being closely watched, as stated by the City of Portland.
If you’re unsure whether your water comes from Bull Run, now’s the time to check with your local provider. A list of affected districts is available on the Water Bureau's website. They've also committed to keeping the public informed, promising to "notify the media and public immediately should further test results indicate a risk to public health and precautions are necessary." For more details on water quality, residents can contact the Water Quality Line at 503-823-7525.
