Toxic Algae Advisories

Be on the look out for waters that look suspicious — foamy, scummy, thick like paint, pea-green, blue-green or brownish red, or bright green cells suspended in the water column. When in doubt, stay out!

Health advisories for toxic algae levels have been issued for the following bodies of water in Oregon.

Current advisories

  • Willow Creek Reservoir, located just east of the town of Heppner in Morrow County 7.26.18

Lifted advisories

  • Upper Klamath Lake, located off Oregon Route 140, 15 miles west of Klamath Falls in Klamath County. Pet owners are still encourage to exercise caution in areas where the water looks suspicious. LIFTED 11.27.18
  • Keno Dam Reservoir, located approximately 12 miles southwest of Klamath Falls on Oregon Highway 66W in Klamath County LIFTED 11.27.18
  • Cullaby Lake, located just off Highway 101 between Astoria and Seaside in Clatsop County LIFTED 9.14.18
  • Ross Island Lagoon, located about a mile south of downtown Portland in Multnomah County. LIFTED 8.24.18
  • Odell Lake, located 75 miles southeast of Eugene off Highway 58 in Klamath County. Advisory lifted for humans, but the level of cyanotoxin in Sunset Cove where the bloom was located and the sample taken remains above the OHA guideline value for dogs, so health officials recommend keeping pets out of this area. UPDATED 8.8.18
  • Detroit Lake from the log boom through Big Cliff Lake. Detroit Lake is located 46 miles southeast of Salem LIFTED 8.16.18
  • Upper Klamath Lake, located off Oregon Route 140, 15 miles west of Klamath Falls in Klamath County LIFTED 7.31.18
  • Lake Billy Chinook, located about 12 miles west of Madras, in Jefferson County LIFTED 7.19.18
  • Dorena Reservoir, located six miles east of Cottage Grove in Lane County LIFTED 6.22.18

Permanent advisory

  • South Umpqua River: Avoid water in pools of bedrock along the South Umpqua River and Lawson Bar.

Children and pets are particularly susceptible to this toxin

Exposure to toxins can produce symptoms of numbness, tingling and dizziness that can lead to difficulty breathing or heart problems and require immediate medical attention. Symptoms of skin irritation, weakness, diarrhea, nausea, cramps and fainting should also receive medical attention if they persist or worsen. Children and pets are particularly susceptible.

Swallowing or inhaling water droplets should be avoided, as well as skin contact with water by humans or animals. Drinking water from these bodies of water is especially dangerous. Oregon Public Health officials advise campers and other visitors that toxins cannot be removed by boiling, filtering or treating the water with camping-style filters.

Oregon Public Health recommends that people who choose to eat fish from waters where algae blooms are present should remove all fat, skin and organs before cooking since toxins are more likely to collect in these tissues. Additionally, public health officials advise that people should not eat crayfish or freshwater shellfish harvested from these bodies of water while this advisory is in effect.

A hazard for dogs

Dogs have become very sick and even died after swimming in and swallowing water affected by toxic algae. If you find thick, brightly colored foam or scum at a lake, pond or river, don’t let your pet drink or swim in the water. Avoid contact with the water, as toxins can be absorbed through the skin.

Symptoms in dogs

Exposure to toxic blue-green algae can result in:

  • Weakness or collapse
  • Nausea, vomiting
  • Excessive drooling
  • Abdominal pain
  • Diarrhea
  • Difficulty breathing
  • Shaking, trembling
  • Tremors, rigidity, paralysis

If your dog goes into the water:

  • Don’t let your pet lick its fur.
  • Wash your pet with clean water as soon as possible.
  • If your dog has symptoms such as drooling, weakness, vomiting, staggering and convulsions after being in water, seek immediate veterinary care. Acute, life-threatening symptoms from cyanobacterial toxins often develop rapidly. Death can occur within minutes to hours after exposure.

For more information, contact the Harmful Algae Bloom Surveillance program at (971) 673-0400.

Updated: 2018-11-27 08:00:00

Author: Oregon Veterinary Medical Association