The 2013 bloom season extended from June 2013 into January, 2014. Twelve advisories were issued that were in effect for a total of 731 days (advisory-days). Get complete details in the 2013 Bloom Season Recap.
2013 was the last season for the Harmful Algae Bloom Surveillance program as CDC funding ceased on September 30, 2013. Although many of the activities performed by the program can no longer be sustained, there are certain activities that OHA has committed to continue, such as; the issuing and lifting of advisories, receiving and documenting illnesses, and updating advisory outreach venues like this.
This map displays the location of each advisory (in sequence). See the table below for detailed information, including links to the original advisories. Links are displayed by the date an advisory was issued (start date) or lifted (end date).
2013 Advisory Listing
Waterbody |
County |
Dominant Species/Toxin |
Cell Count/Level |
Start Date |
End Date |
Willow Creek Reservoir |
Morrow |
Anabaena flos-aquae |
3,551,625 |
6/18/2013 |
8/13/2013 |
Lost Creek Lake |
Jackson |
Anabaena flos-aquae |
1,175,333 |
6/20/2013 |
7/05/2013 |
Dexter Reservoir |
Lane |
Anabaena flos-aquae |
2,228,000 |
7/03/2013 |
9/19/2013 |
Dorena Reservoir |
Lane |
Anabaena flos-aquae |
556,000 |
7/25/2013 |
9/24/2013 |
Devils Lake |
Lincoln |
Microcystis |
Unknown |
8/01/2013 |
11/21/2013 |
Blue Lake |
Multnomah |
Visible Scum |
Unknown |
8/06/2013 |
8/09/2013 |
Fern Ridge Reservoir |
Lane |
Visible Scum |
Unknown |
8/15/2013 |
12/18/2013 |
Blue Lake |
Multnomah |
Visible Scum |
Unknown |
9/09/2013 |
9/13/2013 |
Lost Creek Lake |
Jackson |
Anabaena flos-aquae |
1,032,975 |
9/13/2013 |
12/30/2013 |
Walterville Pond |
Lane |
Microcystis |
46,000 |
9/13/2013 |
10/3/2013 |
Tenmile Lakes |
Coos |
Microcystis |
Unknown-high toxins |
10/04/2013 |
12/03/13 |
Willow Creek Reservoir |
Morrow |
Anabaena flos-aquae |
1,104,950 |
10/25/2013 |
1/21/2014 |