People living on toxic land surrounding the Richmond RAAF Base have been warned the consumption of large amounts of locally-grown meat, eggs and fish could pose an unacceptable risk to their health.

But levels of the potentially carcinogenic per- and poly-fluoroalkyl [PFAS] chemicals in livestock reared in the area and sold to the general public remains an area of "uncertainty", according to risk assessments released by Defence on Wednesday.

The reports, by consultancy AECOM, examined the risks to humans and wildlife from the base's use of firefighting foams containing PFAS over several decades.

Overseas studies have linked the chemicals – historically manufactured by 3M – to a slew of health effects including immune suppression and kidney dysfunction.