Topics
A to Z
Data &
 Statistics
Forms &
Publications
News &
Advisories
Licensing &
Certification
Rules &
Regulations
Public Health
Directory

Eight advisories were issued in 2015. The bloom season began in May and extended through October.

map


Waterbody Issued Lifted County Dominant genus / toxin Cell count/Toxin
Detroit Reservoir​​ May 15, 2015  May 21, 2015 Linn/Marion Cylindrospermopsin 38.9 ppb
Lake Billy Chinook Reservoir June 25, 2015  July 1, 2015  Jefferson Microcystin 22.5 ppb
Willamette River Ross Island Lagoon July 9, 2015  October 1, 2015  Multnomah Microcystis, Dolichospermum and Cylindrospermopsis Klamath
Upper Klamath and Agency Lakes
(excluding Pelican Bay)
July 28, 2015  Klamath Klamath Microcystin 12 ppb
Upper Klamath and Agency Lakes (extended downstream to Keno Dam) July 29, 2015 October 27, 2015 Klamath Microcystin 14 ppb
Upper Klamath and Agency Lakes (lifted below JC Boyle Reservoir to California border) August 5, 2015 August 14, 2015 Klamath Microcystin 470 ppb
Clackamas Cove September 28, 2015  November 4, 2015 Clackamas Anabaena planctonica 457, 360 cells per milliliter
Willow Creek Reservoir October 13, 2015 October 27, 2015 Morrow Microcystin 354 ppb
​​​