Has there been a bloom in my area?

During the warm seasons, water quality testing is conducted about every two weeks at over 20 locations throughout Clear Lake. This testing is provided by the Big Valley Band of Pomo Indians and the Elem Indian Colony. To find out if a bloom is occurring, visit the Clear Lake Cyanotoxin page.

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1. What are Cyanobacteria?
2. What are the health effects of the toxins?
3. How will I be alerted about a bloom?
4. Has there been a bloom in my area?
5. Where can I find historical occurrences of bloom and/or report a bloom?