Several residents in Tasmania expressed their concerns in one of the area's water supply against toxic waste from plantations.

Parts of St. Helens community are still worried about the town's water supply disregarding statements from a scientific panel finding that there is no risk to public health.

The panel, commissioned by the Tasmanian government, revealed its report to a public meeting in St. Helens regarding the situation of east coast last night.

There are very minor levels of naturally occurring toxicants in the George River like any other catchment area, but at naturally occurring levels they pose no health risk to the community, Panel spokesman Dr George Batley said.

So, yes there are toxicants in the water but at naturally occurring levels they pose no health risk to the community.

However, Greens water spokesperson Tim said the report still showed signs of pecticides into the water supply.

Environment Minister David O'Byrne said the government will continue to monitor the systems.

Tasmania has one of Australia's most comprehensive statewide monitoring systems in place to detect pesticide and other contamination events, Mr O'Byrne said.

Meanwhile, About 50 people showed up during the meeting and were told that no trace of toxins from eucalypt plantations have contaminated St. Helens drinking water or toxins were not connected to cases of cancer in the town.

Several commended the panel for their hard work while others were angry that the meeting had been called at short notice.

Still, several urged for more testing to be done in the water.

As a potential grandmother my concerns really are based around the quality of our drinking water, one resident told the meeting.

Convenor John Ramsay disclosed the panel may pursue another meeting if requested by the residents.