Labor's NSW and federal branches have pledged $5 million each to fix water problems in Yass, if they win upcoming elections.

Yass residents believe their local water supply is making them sick, and politicians from several parties see the opportunity to swing in and win some votes by addressing it.

Labor Member for Eden-Monaro Mike Kelly says the federal Labor party will provide $5 million to the council to build a water treatment facility, if it wins the election in May.

Reports say this was backed by a matching $5 million pledge from the state Labor party, also contingent on the next election.

Yass mayor Rowena Abbey says that no matter who wins the NSW election, the town should see some money.

She said the NSW Liberal Government had pledged $11 million for the whole treatment plant if they won.

“Both the state Liberal government [promising to] fund the whole project, and both Labor state and federal funding combining to fund the project, is a great win for our community, a fantastic result,” she said.

“If we had a state Liberal win, we will get that funded, if we have a mixture, we will still be working with whoever gets in to ensure we actually get those funds to deliver the project that both sides of parliament have committed to, which is a win-win for our community.”

Member for Goulburn Pru Goward said the money will depend on the business case for the treatment plant.

“In December last year the NSW Liberals and Nationals provided $1.2 million in funding to enable the Yass Valley Council to develop a business case for this project,” Ms Goward wrote in a statement.

“Once the business case is finalised, we will make funding available from the NSW Liberals and Nationals flagship $1 billion Safe and Secure Water infrastructure program.”