The advisory for Grand Lake St. Marys has been downgraded to a toxin advisory, which means that people should avoid direct contact with the lake, such as swimming or waterskiing; but that boatin on the lake is now acceptable.
Samples taken Monday at West Beach, East Beach and Camp Beach continued to measure falling levels of algal toxins. Microcystin levels range from 2.6 to 4.5 ppb, with the highest at Camp Beach.
Anatoxin was measured at 0.3 ppb at West Beach and 0.2 ppb at both East and Camp beaches. Saxitoxin and cylindrospermopsin were not detected. Microcystin was 6.1 ppb at the Celina drinking water plant intake, but no toxins have been detected in the city’s treated drinking water.