Latest Updates

Fewer reports are flowing in as we move into fall, park staff leave posts, and seasonal residents close up camps. However, late season blooms are not uncommon so please keep checking conditions whenever you recreate in or around water. Read...

The state of Vermont is developing its Climate Action Plan and drafters need your input to produce a forward-thinking guidance document that addresses the climate emergency. Seven events to gain public comments will be held throughout the state beginning tomorrow and running through early October. Read...

Although generally safe conditions dominated the cyanobacteria tracker again this week, we received reports of cyanobacteria from all Lake Champlain regions except the South Lake and Malletts Bay. Monitors also logged in bloom reports for some sites on Lake Carmi and Lake Memphremagog. Read...

Generally safe conditions prevailed at most locations again this week but cyanobacteria was reported at Lake Champlain’s Main Lake Central, Main Lake South, Missisquoi Bay, St. Albans Bay, and South Lake and at Lake Carmi and Lake Memphremagog. Read...

Windy, cooler weather helped improve water quality conditions during this eleventh week of monitoring. While generally safe conditions prevailed at most locations, cyanobacteria was reported at Lake Champlain’s Inland Sea, Missisquoi Bay, and St. Albans Bay as well as Lake Carmi and Lake Memphremagog. Read...

Cyanobacteria Monitors filed over 240 reports this past week as blooms popped up or persisted in numerous locations on Lake Champlain and several inland waterbodies. Lake Champlain’s Inland Sea, Main Lake Central, Main Lake South, Missisquoi Bay, South Lake, and St. Albans Bay all experienced blooms as did Chittenden Reservoir, Lake Carmi, Lake Iroquois, Lake Memphremagog, and Shelburne Pond. Read...

Happy Friday! Lots of green dots populated the cyanobacteria tracker this week and reports of clear water, non-filamentous green algae, and iron bacteria dominated over cyanobacteria in most areas. However, we did have cyanobacteria bloom reports from Lake Carmi and Lake Morey as well as Lake Champlain’s Inland Sea and low and high alert conditions at several St. Albans Bay sites as of today (8/20/21). Read...

Cyanobacteria monitors kept us busy again this week with 136 Lake Champlain reports and 43 from inland waterways. Blooms occurred in the Lake Champlain’s Inland Sea, Main Lake North, Malletts Bay, and St. Albans Bay as well as Indian Brook Reservoir and Lake Carmi as of this writing. Read...

We had many clear water reports early in the week but conditions changed in some areas as the temperatures rose and the air stilled later in the week. A bloom took off in St. Albans Bay, and alert conditions were witnessed elsewhere on Lake Champlain, Lake Carmi, and Lake Memphremagog. Read...

Happily water conditions improved significantly this week! Roughly 85% of the Lake Champlain reports and 94% of inland waterway reports showed generally safe conditions. Read...

Another busy week of monitoring with variable conditions up and down Lake Champlain. While most monitors reported generally safe conditions at Lake Champlain and inland waterway monitoring sites, low and high alert blooms were in evidence too. Lake Champlain’s St. Albans Bay, Inland Sea, Malletts Bay, Main Lake North, Main Lake Central, and Main Lake South, along with Indian Brook Reservoir and Lake Carmi, all experienced cyanobacteria blooms. Read...

Lake Champlain Committee (LCC) and community monitors filed a total of 246 reports this week as blooms showed up in a host of Lake Champlain shoreline and inland lake locations. Escalating temperatures spurred cyanobacteria growth that closed beaches at several lakeshore communities. Read...

Although generally safe conditions still dominate on the cyanobacteria datatracker, blooms showed up in several sections of Lake Champlain and Lake Memphremagog this week. Read...

While we received some reports of low alert cyanobacteria conditions on Lake Champlain and Lake Carmi, the majority of monitors observed generally safe conditions during this second week of the 2021 monitoring season. The cyanobacteria datatracker is populated with lots of green dots again this week. Yay! Read...

Monitoring began this week and will run through early fall. This week’s report covers conditions from Sunday, June 20 through early-afternoon on Friday June 25. The vast majority of reports we’ve received to date indicate generally safe conditions. Yay! Read...

Photo of a cyanobacteria bloom by Stephanie Krzywonos. Copyright Lake Champlain Committee.

Cyanobacteria blooms: Why do they happen, what are the risks, and what can we do?

Cyanobacteria blooms have received increasing attention in recent years, as a result of

particularly strong blooms in some areas. As research into blooms continues, we learn

more about what things make cyanobacteria blooms more likely, what dangers blooms

can pose to humans and other animals, and what the future might hold.

Read...