8/8/18: There was a detection of a pesticide (atrazine – 27 ug/L) above the ADWG health limit on 8 August  2018. This was the first detection of atrazine in Lake Trevallyn since sampling for pesticides began in  2015.
An error occurred with the laboratory notification process which resulted in this exceedance not  being highlighted, and therefore there was no immediate resample. However, there have been no  detections of atrazine in any samples since August 2018.

TasWater Annual Drinking Water Quality Report 2018-2019 Section A Summary