Cryptosporidium monitoring update
The Portland Water Bureau announced the detection of low levels of Cryptosporidium in routine monitoring from the Bull Run Watershed, with one oocyst found in 50 liters on November 9 and 10, and three detected on November 11. No Cryptosporidium was present in samples collected on November 12. Though the bureau currently does not treat for Cryptosporidium, it is under obligation to install filtration by September 30, 2027, in compliance with drinking water regulations set by the Oregon Health Authority. In the interim, the bureau is implementing watershed protection measures and additional monitoring. Public health officials have determined that customers do not need to take extra precautions, but those with weakened immune systems should consult their healthcare providers about water safety.
The Bull Run Watershed serves as the primary drinking water source for Portland and surrounding areas, including several water districts. The bureau commits to notifying the public immediately if future testing indicates any health risks. Customers with questions regarding water quality can contact the Water Quality Line at 503-823-7525.