City of Boulder is warning residents to keep children and animals away from harmful blue-green algae that has been spotted in Wonderland Lake and Thunderbird Lake. This means that there is no swimming, wading, boating, or animals allowed in this water. Fishing is still allowed, but city officials warn that any fish caught should be thoroughly cleaned and guts should be discarded of. Blue-green algae, also known as cyanobacteria, grow during the summer in slow-moving lakes or ponds. Some cyanobacteria species can produce cyanotoxins during algal blooms which can be harmful at elevated levels if... Read More