Recreational water users are advised to avoid direct contact with water in Lake Wallace at Edenhope following the detection of elevated blue-green algae levels.
Lake Wallace joins Taylors Lake and Green Lake, near Horsham, and Lake Lonsdale, near Stawell, as waterways listed to have blue-green algae.
Visitors can still enjoy recreational activities at the lakes such as bushwalking, sightseeing and other activities – any that do not involve direct water contact.
Warning signs have been positioned at major recreational areas around the lake and will remain in place until blue-green algae levels drop below the threshold considered safe for recreational use.