UPDATE 8:04 a.m. Tuesday
According to Norwalk public works director Josh Snyder, The upper reservoir has been tested and the algae there is putting out toxins over an acceptable level (set by EPA). Norwalk was given approval by EPA to treat upper with chemicals and did so Monday evening. Staff is monitoring it closely for a re-application. Our signs and restrictions on the upper reservoir will stay in place until the toxins are at an acceptable level.
Per a release from the city of Norwalk...
The City of Norwalk's water plant personnel today detected a possible harmful algae bloom in Upper Reservoir.
Upper Reservoir has been isolated from Memorial and Lower Reservoirs. There are no similar blooms in the other reservoirs. The cites drinking water is produced form water in Lower Reservoir, and as such, is unaffected by the bloom in Upper Reservoir.
The algae in Upper reservoir is capable of producing toxins harmful to human and pets. Tests for toxins are underway, and results should be available by tomorrow.
As a precaution, no boats are being allowed in Upper Reservoir. Humans and pets should not have any contact with the water in Upper Reservoir. Most importantly, pets should not be allowed to drink from Upper Reservoir.