People dumping animal carcasses and other waste are contaminating the Tuturumuri Recycling Centre - meaning it may have to close.
It has now become a health and safety issue for recycling contractors Earthcare, according to South Wairarapa District Council.
"The contractors, when trying to sort out what is recycling and what is not, are becoming contaminated," said Mark Allingham, group manager infrastructure and services for the council.
He said Earthcare had been carrying the cost of cleaning up the site. "They had been doing it for free but they are no longer prepared to now.
"We are looking for discussion on what is the best way to deal with recycling."