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

  • No current advisories at this time, other than the permanent advisory at the South Umpqua River.

Lifted Advisories

  • Agency Lake, just north of Upper Klamath Lake near Klamath Falls along Highway 97 in Klamath County. 12.16.16
    Note: Water monitoring has confirmed that the level of blue-green algae toxins is below guideline values for human exposure. However, Oregon Health Authority recommends that people continue to be cautious with their pets in the lake because toxins are still above the very low exposure levels established for dogs.

  • Howard Bay in Upper Klamath Lake, located just north of Klamath Falls along Highway 97 in Klamath County 10.3.16
    Note: Sampling in Howard Bay shows toxin levels now under the threshold for humans, but still over the level that can be problematic for dogs. OHA reminds people to continue to be careful with pets when recreating in the lake. Other areas of concern for dogs are Moore Park and Eagle Ridge Co. Park.

  • Blue Lake, located just outside Wood Village north of Interstate 84 in Multnomah County 9.7.16

  • Ross Island Lagoon and the mouth of the lagoon as it connects to the Holgate Channel. Ross Island Lagoon is located about one river mile south of downtown Portland in Multnomah County. LIFTED 9.1.16

  • Odell Lake, located 75 miles southeast of Eugene off Highway 58 in Lane County 7.28.16

  • Metolius Arm of Lake Billy Chinook from Perry South campground to the Three Rivers Resort and all of the Crooked River arm, located about 12 miles southwest of Madras in Jefferson County. LIFTED 7.15.16

Permanent Advisory

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

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.

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 bloom-affected water, call your veterinarian immediately.

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

Updated: 2016-12-16 08:00:00

Author: Oregon Veterinary Medical Association