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Travis Landing Water Quality Monitoring 9/29/2021
Posted on September 30, 2021 12:01 PM by Maggie McLening
 
Three Cyanotoxins Found in Austin Lakes
 
No neurotoxins were detected in the SPATT (Solid Phase Adsorption Toxin Testing) bag at Travis Landing this month but on September 27 the City of Austin reported finding cyanotoxins in Lady Bird Lake and Barton Creek. LCRA is therefore advising us to keep a look out for any blue-green algae near our shoreline. All types of algae thrive in warm shallow water with little movement, such as that surrounding our peninsula and we must keep our dogs away from it.
 
Three different toxins were found in Lady Bird Lake. They were in algae samples taken on September 13 from Cold Spring, between MoPac and Red Bud Isle, Auditorium Shores, South First Street bridge and the Festival boat ramp. Some sites had only dihydroanatoxin (the main cyanotoxin found at Travis Landing) and some had both cylindrospermopsin and homoanatoxin-a. All three toxins were found in samples from Red Bud Isle and it remains closed with warnings posted for pet owners. Algae can move around, however and may be present in other areas of the lake. Mats of algae are often mixed in with other vegetation, especially an aquatic plant called Cabomba. 
 
 
In this photo from Friday, September 17, 2021, Cyanobacteria is showing up as brown, yellow and blue blobs among Cabomba plants.
 
The City of Austin also detected concerning levels of cylindrospermopsin in Barton Creek at Sculpture Falls, near MoPac and Loop 360. Samples were taken on September 9 after a report of a human illness and results were received on Sept 22. Levels detected were above EPA guidance values for recreational use, so the City of Austin has posted warning signs at access points to the Barton Creek Greenbelt near Sculpture Falls.
 
Here are the results of the latest water quality tests conducted by John Anderson at Travis Landing:
 
 
Note: The level of dissolved oxygen is still very low and may affect fish off our shoreline. LCRA has been made aware of this.