The Portland Water Bureau has warned the public of a recent finding in their water supply: traces of Cryptosporidium were found in the Bull Run Watershed intake, which is the primary source for Portland’s drinking water. According to a release from the Portland Water Bureau, one Cryptosporidium oocyst was detected in samples taken on November 18 and November 19, although no detection was made in samples from November 17 and November 20. This comes after a prior detection on November 12, 2024.