The Liberal Party will spend $16 million on Perth's rivers if it wins the state election.
The Environment Minister, Bill Marmion, says the money will be spent improving water quality, and on a black swan breeding program.
He says he will also create new pathways and open more cafes along the river.
Mr Marmion believes the funding will improve the waterways.
"That will improve the rock walls and some of the beaches along the foreshore, and that will be broken up into various reaches of the Swan and Canning River," he said.
"There is a $7 million package to improve the rock walls and some of the beaches along the foreshore.
"Probably the most significant is along the Mends Street to the Narrows Bridge area, we'll allocate $1.5 million towards that."
Part of the money will also be spent on looking at ways to reduce the inflow of water-soluble nutrients such as nitrogen and phosphorus, which cause the toxic algal blooms responsible for killing fish.
Mr Marmion says the funding will also be used for a black swan breeding program.
"Trying to improve the number of black swans on the Swan River," he said.
"The Swan River is one of Perth's greatest icons along with Kings Park and the Black Swan.
"Everyone knows our state emblem right in the middle there, the Black Swan, and we want to improve the number of black swans on the Swan River."
The Conservation Council says the State Government should be focusing on banning fertilisers from entering the Swan River, rather than cleaning up the problems they cause.
The council's Piers Verstegen says those nutrients are destroying the river's health, and need to be significantly reduced in order for any improvement to occur.
"The Swan River's facing a real ecological crisis with the amount of pollution that's entering in it from fertiliser, and this announcement of $16 million really doesn't do anything to fix that," he said.
"The only way to really, seriously address the issue of pollution getting into the Swan River is to reduce the input of pollution from its source, which is agricultural fertiliser.
"Spending money to fix the pollution problem once that pollution is in the river is really chasing its tail."