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Algae Bloom Advisories
When in doubt, stay out!

Exposure to harmful algae blooms increases in warmer months. OHA staff advise people to be alert for algae blooms when recreating in your favorite swimming or fishing hole.

  • Avoid waters that look suspicious (foamy, scummy, thick like paint, pea-green, blue-green or brownish red).
  • Remember, even if an advisory is not in place or you didn't notice a sign, you are always your own best advocate when it comes to looking out for you, your family and your pets.

The map and table below are continually updated with the most current information on advisories issued and lifted throughout the season for waterbodies that are monitored. NOTE: Only a fraction of all waterbodies in Oregon are monitored due to limited physical and monetary resources.

Douglas County - South Umpqua River and Lawson Bar. A permanent health advisory is in place for the pools of water that form in the bedrock along the rivers edge. Signs have been posted at several access areas Permanent Umpqua River Sign.jpgPermanent Umpqua River Sign (.jpg)


2014 Advisory Listing  (Click on issued or lifted date to view news release)
# Waterbody Region County Dominant species / toxin Cell count/
(start date)
(end date)
Duration (days)
1 Lost Creek Lake  Southwest  Jackson  Anabaena flos-aquae  3,222,251 cells/mL 6/3/2014 6/26/2014 22
2 Odell Lake Central Klamath Microcystin 675 parts per billion (ppb) 7/21/2014 8/8/2014 18
3 Devils Lake Northwest Lincoln Microcystin >25 ppb 8/1/2014 11/25/2014 116
4 Walterville Pond  Willamette
Lane Microcystis 53,000 cells/mL 8/5/2014 10/2/2014 58
5 Tenmile Lakes Southwest Coos Microcystin 107 ppb 9/15/2014 11/25/2014
6 Willamette River Willamette Multnomah Microcystis 2.25 million cells/mL 9/16-19/2014
10/2/2014 16
7 Wickiup Reservoir Central Deschutes Microcystin 20.6 ppb 9/19/2014 11/10/2014​ 52
8 Cullaby Lake Northwest Clatsop Cylindrospermopsin &
12 ppb &
16 ppb
9/22/2014 10/3/2014 11
​9 ​Willow Creek Reservoir ​Northeast ​Morrow ​Microcystis ​1,777,664 cells/mL 10/10/2014​ 11/18/2014 ​39
​10 ​Lost Creek Lake
​Southwest ​Jackson Anabaena flos-aquae 197,629 cells/mL
12/4/2014 2/26/2015​ 84​

Details of historical health advisories issued in previous years can be found in the Advisory Archive.

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