Algal Bloom Surveillance Map

The map is updated regularly during the months of May – October. 

You may expand the map to make it larger using the four corner symbol in the upper right hand corner of the map header bar.

Once you expand the map, you may click on recent monitoring points, and click the magnifying glass in the search bar to search for landmarks and addresses to see if there are harmful algae blooms nearby.

If you embed the Google map on your site please be sure to copy and paste the below legend onto your page as well, so users will know what the different colored dots represent.


How do I report an Algal Bloom or Fish Kill?

If you are concerned that you have been exposed to a harmful algal bloom, please see your doctor or call your local health department. Telling your doctor about contact with water may help him/her treat the illness properly.

Click Here to Report a HAB Online  

Questions about health effects and algal blooms, call: The Virginia Department of Health                                      HAB Hotline: (888) 238-6154
To report discolored water (red, brown, or green) with an odd odor, or dead fish in the water, call: The Department of Environmental Quality:                  (757) 518-2000
To report fish with lesions, call: The Virginia Institute of Marine Science:                         (804) 684-7000

For information on federal policy and guidance, including advisory thresholds for algal toxins in drinking water, please visit the EPA CyanoHAB website and the CDC HAB-Associated Illness website.