Here is some advice kindly provided by the Eurobodalla Council:
I have just received your message regarding the condition of the water at Durras. In relation to your concerns I advise that:
Council regularly carries out Beachwatch testing at Durras and on Wednesday 27 December 2006 this was carried out at Cookies Beach (adjacent to Murramarang Resort). The sampling did not identify any bacterial contamination of this area.
Without any photos or further information, it is difficult to say exactly what you have observed. The green sludge is most likely to be algae which has been blown/washed up onto the shoreline. It is highly unlikely to have been effluent sludge.
All of the housing in this area is serviced by Septic systems (of varying types) – there is no sewer system currently in this area.
I would suggest that if you have any reason to be concerned about the state of the water, that you should seek an alternate swimming venue whilst those conditions exist.
I hope this assists you with your concerns.
Environmental Health Officer
Eurobodalla Shire Council
Phone: 4474 7414