Boxes of fresh fruit and vegetables are being handed out.
"It's important we do what we can to help at a practical level while we continue working towards finding the cause."
Residents are being encouraged to take up a free blood test made by health officials.
"This is a systemic issue that has since been addressed."
The test relates to a sample taken at Waikouaiti Golf Club in east Otago.
The alert was emailed to a Dunedin City Council (DCC) Three Waters staff member who was on holiday
The water must not be used for drinking, cooking or preparing food.
The likely cause of death was warm, low-oxygen inflows of ponded floodwater.
The sea lion named "Hariwa" gave birth last week on a beach-side golf course.