Tools for Local Government Agencies: 
Harmful Algal Bloom-Related Illness

This toolkit was developed as a resource for local beach managers interested in harmful algal bloom monitoring and response.

• Harmful Algal Bloom: Information for Beach Managers (PDF)
  A toolkit to help identify harmful algal blooms, testing options, posting advisories, and reporting illnesses.

When local authorities such as county or city officials are aware of a blue-green algae bloom or a waterbody with chronic blue-green algae occurrence, they may choose to post an advisory sign or recommend the lake or beach be closed to in order to protect public health.

The posting and removal of all signs is at the discretion of the local agency.

• Water Advisory (PDF)
  This sign advises visitors that the water contains a blue-green algal bloom and contact with the water is not advised. Recommendations about boating and fishing are also provided.

MPCA: Blue-Green Algae and Harmful Algal Blooms
More information about what blue-green algae blooms look like from the Minnesota Pollution Control Agency.