Cyanobacteria, also referred to as blue-green algae, are a common and natural component of the microscopic plants (plankton) in Lake Champlain.
Some types of blue-green algae produce natural toxins or poisons. When these algae die and break down, toxins can be released into the water. Learn more: Facts about Blue-green Algae
People and pets should stay away from blooms. To find out if a beach or swim area is open: Contact whomever is responsible for maintaining the beach. This may be the town, a private association, or Vermont State Parks.
Weekly Summary: August 21, 2015
- Main Lake
- North – Conditions were mixed with the area north of the RT 129 bridge to Isle LaMotte reporting low alert conditions on August 19 and Pelots Point West reporting high alert conditions on August 18. Watch for and avoid algae blooms in these locations. The other locations are reporting good conditions and are considered generally safe at this time.
- Central - Mixed conditions were reported earlier in the week, but have cleared. This area is considered generally safe.
- South – Good conditions reported. This area is considered generally safe.
- Malletts Bay
- Good conditions reported. This area is considered generally safe.
- St. Albans Bay
- Conditions changed frequently throughout the week. The Black Bridge and St. Albans Bay park area reported high alert conditions on August 18 and 19. High alert conditions were also reported from the Georgia shore area earlier in the week. Watch for changing conditions and keep people and pets away from blooms.
- Inland Sea
- Conditions changed during the week with high alert conditions reported in the Dunham Bay area as of August 15. Watch for changing conditions in this area and keep away from blooms. All other locations reported good conditions and are considered generally safe at this time.
- Missisquoi Bay
- Conditions changed frequently throughout the week. The northern and eastern portions of the bay reported low and high alert conditions, while areas of the western side of the bay reported good conditions. Watch for changing conditions and avoid algae blooms.
- South Lake
- Good conditions reported. This area is considered generally safe
Vermont Inland Lakes
- Carmi - Mixed conditions reported this week. The North Beach reported low and high alert conditions. All other locations reported good conditions. Watch for algae and avoid contact with blooms.
- Elmore - Good conditions reported. This area is considered generally safe.
- Iroquois - Good conditions reported. This area is considered generally safe.
- Memphremagog - Good conditions reported. This area is considered generally safe.
New York Lake Champlain conditions: Good conditions reported. There have been no reports of blooms.
Other Bodies of Water
- Beach or swimming areas: Contact whomever is responsible for maintaining the beach. This may be the town, a private association, or Vermont State Parks.
- New York lakes other than Lake Champlain
- Quebec lake information
Our interactive Algae Tracker Map is a good source of information about current conditions, and is mobile-friendly. Thanks to the Lake Champlain Committee staff and citizen volunteers for another season of support.
|Not all Vermont bays, lakes, and ponds are monitored. Be aware of changing conditions, and keep out of the water if you think blue-green algae may be present.|
- Search by lake region or by town
- View latest results by test site
- Click on the site's alert status for more information
The tracking map provides condition information and data as of the date of report. Test site observations and samples are collected once each week. Conditions can and do change. If you see blue-green algae, don't go in the water.
The interactive Lake Champlain status map brings together in one place environmental and public health surveillance data about Blue-green algae. The map is a data collaboration project of the Departments of Health and Environmental Conservation.
For more information:
Email: Environmental Health Division.
The interactive map color codes correspond with alert levels.
Generally Safe - green
No toxic blue-green algae blooms were present along these shoreline areas. These areas should be safe for recreational uses.
Low Alert - yellow
These shoreline areas have blue-green algae at levels below bloom conditions. If toxin testing was conducted, toxin concentrations are below levels of concern for recreational use. These areas are open for recreation, but caution is advised in any areas where dense accumulations or scums are apparent.
High Alert - red
These shorelines have blue-green algae in dense scums at least in some areas. If toxin testing was conducted, toxin concentrations are at or above levels of concern for recreational use. The water is not safe for recreational use in areas that contain scums.
- To report a suspected algae bloom or for more information:
Call: 800-439-8550 or 802-863-7220
You can include digital photographs of the suspected bloom. If possible, include an detailed description of the bloom's location, or an image from an online mapping application such as Google, Bing or Yahoo Maps, marking the bloom location.
- Blue-green Algae Photo Gallery