Lake Bonney S.E is a coastal lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in the south east of South Australia

South Australia

South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

. It is one of the largest freshwater lakes in Australia. The lake is located 450 km (280 mi) south east of Adelaide

Adelaide

Adelaide is the capital city of South Australia and the fifth-largest city in Australia. Adelaide has an estimated population of more than 1.2 million...

 and 13 km (8 mi) south west of Millicent

Millicent, South Australia

Millicent is a town in South Australia, south-east of Adelaide, and north of Mount Gambier. At the 2006 Census, the population was 4,771.The town is home to the Millicent National Trust Museum, and is nearby to the Tantanoola Caves Conservation Park and the Canunda National Park.The Millicent...

. The Canunda National Park

Canunda National Park

Canunda is a national park in South Australia . It is southeast of Adelaide, on the coast about southwest of Millicent. It consists of coastal dunes, limestone cliffs, and natural bushland...

lies adjacent to the lake shore. For over 60 years, large volumes of wastewater from nearby pulp and paper mills have adversely affected the health of the Lake.