water quality Lake’s bacteria level drops Cold weather has caused Lake Colac’s bacteria levels to drop, but Colac Otway Shire Council advises visitors to the lake to remain cautious. By Zara CuthbertsonApril 22, 2022 Call to repair erosion while lake level is low A Lake Colac campaigner says the current health of the lake couldn’t be better but says urgent action is needed to fix shore erosion. By Greta LannenJune 29, 2020