‘Low Levels’ of Algae Toxins Found in Mad River Already This Year, Blue Lake Rancheria Says; Tribe, Partners Will Continue to Monitor The Blue Lake Rancheria Tribe’s Environmental Scientist Jacob Pounds samples the algae mats for analysis. ### From the Blue Lake Rancheria: Low levels of toxins have been detected in algae mat samples from the Mad River, collected by the Blue Lake Rancheria Tribe‘s Environmental Department at two locations where potential algae blooms had been observed. The presence of these toxins, even at low levels, triggers a ‘CAUTION’ posting by Humboldt County Department of Health and Human Services for