A UN report warns that Queensland may not meet water quality targets for the Great Barrier Reef.

The United Nation's World Heritage Committee has issued a draft decision on the state of conservation of the Reef, which says progress on the Reef 2050 plan’s water quality targets has been slow.

It predicts that the earliest of the water quality targets will not be achieved within the required timeframe.

The report also warns that that reef regulations need to be more stringently enforced, and calls for land clearing reforms to protect parts of the Queensland coast that feed into the Reef.

The Labor Government’s Environment Minister Steven Miles said the UN report should encourage the Opposition to support new regulations or risk the reef's World Heritage status.

“It was the previous LNP government who dismantled reef and land clearing protections and who planned to dump dredge spoil on the reef,” Mr Miles said.

“Labor has reversed some of that damage, but we can't achieve our targets while the current Parliament blocks sensible laws.”

Conservation groups have warned that the Reef may be just a few years away from being declared endangered, which would severely damage Queensland’s multi-billion-dollar tourism industry.

The Queensland Government has committed $100 million over the next five years to Reef water quality projects.