Lake Champlain’s Inland Sea, Main Lake North and Main Lake Central along with Shelburne Pond all experienced some blooms this week, while Lake Memphremagog’s previous blooms cleared out. Unseasonably warm temperatures may trigger additional cyanobacteria activity, so continue to check the water carefully, especially if you’re out with pets. Read...

No blooms were reported on Lake Champlain this week but Lake Memphremagog experienced low alert conditions.

Scroll through this report for a “flashback Friday” to the 2019 season, photos from this week’s reports, and a special notice for waterfowl hunters. Read...

Good conditions dominated the cyanobacteria tracker this week for both Lake Champlain and inland lake sites, but we have fewer monitors reporting during the shoulder season. Reports from Missisquoi Bay, Main Lake North, Malletts Bay, Main Lake Central, Main Lake South and South Lake all noted generally safe conditions. Low alerts were reported at some Inland Sea and St. Albans Bay locations.

While blooms are less frequent as temperatures cool, they can still happen. Last year, bloom reports continued into November. Saturday’s warm weather may trigger some cyanobacteria activity. Please continue to check the water carefully. Read...

Good conditions prevailed on most of Lake Champlain this week. A few notes of caution however: high alert blooms continue to persist at Lake Carmi and low alert blooms were observed on Lake Champlain’s Inland Sea and the South Lake as well as Lake Memphremagog and Shelburne Pond. When you’re checking out the foliage on the hillsides be sure to check the water for color too as blooms can still appear late in the season. Read...