2011 – 2022: Middle River, Kangaroo Island. Pesticides detected: MCPA, Triclopyr, Chlorosulfuron, Simazine

Middle River

8/8/11: MCPA 0.11ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

8/8/11: MCPA 0.1ug/L (Middle River Res BC Upper Beehive Floating Offtake)

2/12/13: Triclopyr 0.1ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

7/9/15: MCPA 0.1ug/L (Middle River Res BC Upper Beehive Floating Offtake)

14/8/17: MCPA 0.05ug/L (Middle River Res BC Upper Beehive Floating Offtake)

4/6/18: MCPA 0.24ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

18/6/18: MCPA 0.08ug/L (Middle River Res BC Upper Beehive Floating Offtake)

16/7/18: MCPA 0.05ug/L (Middle River Res BC Upper Beehive Floating Offtake)

21/8/18: MCPA 0.23ug/L (Middle River Res BC Upper Beehive Floating Offtake)

19/8/19: MCPA 0.06ug/L (Middle River Res BC Upper Beehive Floating Offtake)

1/2/20: MCPA 0.07ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

15/8/22: Middle River Road Bridge 1.5km u/s Reservoir MCPA 0.05ug/L

14/11/22: Middle River Road Bridge 1.5km u/s Reservoir MCPA 0.07ug/L

11/7/22: Middle River Raw Water Chlorosulfuron 0.05ug/L

15/8/22: Middle River Raw Water MCPA 0.27ug/L

15/8/22: Middle River Raw Water Simazine 0.7ug/L

17/10/22: Middle River Raw Water MCPA 0.09ug/L

Prior to World War II the residents of Kangaroo Island and its largest town, Kingscote, relied mainly on farm dams, rain water tanks and a small water supply scheme established in 1938 for their water.

But the lack of a major, reliable water supply became a major issue following the war, when the Soldier Settlement Scheme settled 170 new families on the Island.

The population on the Island more than doubled between 1948 and 1962, making the need to develop a reliable water supply urgent.

Following an intensive investigation, in 1965 the South Australian Government of the day approved the construction of a dam on the Middle River.

Completed in 1968, the Middle River Reservoir is a thin-walled, prestressed concrete structure which, along with major infrastructure such as roads, cost $1.6 million to build.

Middle River

8/8/11: MCPA 0.11ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

8/8/11: MCPA 0.1ug/L (Middle River Res BC Upper Beehive Floating Offtake)

2/12/13: Triclopyr 0.1ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

7/9/15: MCPA 0.1ug/L (Middle River Res BC Upper Beehive Floating Offtake)

14/8/17: MCPA 0.05ug/L (Middle River Res BC Upper Beehive Floating Offtake)

4/6/18: MCPA 0.24ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

18/6/18: MCPA 0.08ug/L (Middle River Res BC Upper Beehive Floating Offtake)

16/7/18: MCPA 0.05ug/L (Middle River Res BC Upper Beehive Floating Offtake)

21/8/18: MCPA 0.23ug/L (Middle River Res BC Upper Beehive Floating Offtake)

19/8/19: MCPA 0.06ug/L (Middle River Res BC Upper Beehive Floating Offtake)

1/2/20: MCPA 0.07ug/L (Middle River Road Bridge 1.5km u/s Reservoir)

15/8/22: Middle River Road Bridge 1.5km u/s Reservoir MCPA 0.05ug/L

14/11/22: Middle River Road Bridge 1.5km u/s Reservoir MCPA 0.07ug/L

11/7/22: Middle River Raw Water Chlorosulfuron 0.05ug/L

15/8/22: Middle River Raw Water MCPA 0.27ug/L

15/8/22: Middle River Raw Water Simazine 0.7ug/L

17/10/22: Middle River Raw Water MCPA 0.09ug/L

Prior to World War II the residents of Kangaroo Island and its largest town, Kingscote, relied mainly on farm dams, rain water tanks and a small water supply scheme established in 1938 for their water.

But the lack of a major, reliable water supply became a major issue following the war, when the Soldier Settlement Scheme settled 170 new families on the Island.

The population on the Island more than doubled between 1948 and 1962, making the need to develop a reliable water supply urgent.

Following an intensive investigation, in 1965 the South Australian Government of the day approved the construction of a dam on the Middle River.

Completed in 1968, the Middle River Reservoir is a thin-walled, prestressed concrete structure which, along with major infrastructure such as roads, cost $1.6 million to build.