The recreational use health advisories issued for Big Cliff Reservoir and Detroit Lake in Linn and Marion counties have been lifted, according to the Oregon Health Authority.
OHA issued the advisory on July 16 .
“Water monitoring has confirmed that levels of cyanotoxins in Big Cliff Reservoir and Detroit Reservoir are below recreational guideline values for people,” the OHA said in a news release. “However, levels detected are still above OHA’s educational guideline values for dogs, and owners should keep their pets away from these areas.”
Visitors are advised to remain alert of cyanobacteria blooms. Signs of a bloom, exposures and symptoms can be found by visiting OHA’s cyanobacteria blooms webpage at healthoregon.org/hab .
People, especially small children and pets, should avoid areas where the water is foamy, scummy, thick like paint, pea-green or blue-green, or if brownish-red mats or green clumps are suspended in the water.
Cyanotoxins can still exists in clear water.
OHA lifted the recreational use health advisory for the North Santiam River on Aug. 30 after test results showed toxin levels low enough that they shouldn’t harm people who swim or recreate there.