Harmful Algal Blooms

Share & Bookmark, Press Enter to show all options, press Tab go to next option
Print
Rotate1
Rotate2
Rotate3
Rotate4

 

A harmful algal bloom (HAB) is a buildup of blue-green algae that creates a green, blue-green, white or brown coloring on the surface of ponds, lakes and other slow-moving waterways, sometimes occurring as mats or scum.

Blooms are most common between June and September. They grow in warm, stagnant and nutrient-rich water, and are becoming increasingly common both in California and nationwide.

Human exposure to water containing toxic harmful algal blooms, for example by direct body contact or ingestion, can result in a number of symptoms including the following:

  • Rashes
  • Eye, nose, mouth or throat irritation
  • Allergic reactions
  • Headache
  • Gastrointestinal upset, such as abdominal pain, nausea, vomiting and diarrhea
Other Sites
FAQs
Pets & Vets
Tips
Discovery Bay Information