There were 1.14 tonnes of unwanted, broken and damaged goods, a little less than last Monday's dump when most of it was building waste.

While it gets worse over the Christmas break, most weekends people dump unusable goods outside the store.

St Vincent de Paul has to employ Mr Hawke to load the truck with the damaged goods and transport them to the tip - resources that could better be spent funding social welfare programs.

"Everything that is not in the bin is taken to the tip," Mr Hawke said.

"This morning there were mattresses, old lounges, broken toys, blinds and building waste."

To make it worse foragers sift through the goods, spreading items across the lawn, which get further damage from rain and dew.

St Vincent de Paul volunteer Jeanette Flynn said by Monday, almost all of the goods were damaged.

"It's such a waste," she said. "It's a lot of work for our men to do."

The Environment Protection Authority has released a campaign to crack down on the illegal dumping of goods outside charities.

It has also placed Envirocams at a number of sites across NSW, including in the Illawarra area, to catch the dumpers.

The government has provided financial assistance for surveillance experts to review the footage with a view to prosecute. Those found guilty could face up to a $4000 fine.

The Salvation Army's Illawarra regional manager Philip Wahba said two cameras would be installed at its Warilla and Wollongong sites.

He said five tonnes of unusable, illegally dumped goods were collected outside the Salvation Army's Illawarra stores each week, costing the charity $150,000 a year.

In NSW, 40 per cent of all donations become landfill.