Toxic algal blooms affect second Sierra reservoir

A second East Slope reservoir has tested positive for dangerous levels of toxic algae.

A warning for Bridgeport Reservoir was issued on Wednesday by the Lahontan Regional Water Quality Control Board urging anglers and boaters to stay clear of the lake located near Bridgeport.

Visitors are also being warned off Indian Creek Reservoir, which has had a significant bloom of cyanobacteria since at least the beginning of July.

On Wednesday, the water board said sampling preceding the Labor Day weekend at both lakes confirmed observations of a bloom. At Bridgeport toxins exceeding danger levels were found in a sample of water from the dam area. Caution levels were present in a sample collected north of the RV Park.

Water at Indian Creek Reservoir had the appearance of spilled paint and samples indicated dangerous levels of toxins at all three locations tested.

Harmful algal blooms are formed by a cyanobacteria. The toxins can cause inflammation, gastrointestinal distress, headaches, agitation and weakness, or abnormal breathing if swallowed while swimming.

Dogs and children are most susceptible to exposure because of their smaller body sizes, increased potential to swallow water while swimming, and tendency to stay in the water longer. If you suspect exposure, wash your children and dog immediately.

As of Aug. 24, Red Lake at the base of the Carson Pass grade was clear. At Lake Tahoe Connolly, Regan and Barton beaches all had cautions, along with Tahoe Keys, according to mywaterquality.ca.gov