Rio Tinto Weipa

Rio Tinto Weipa is a metal ore mining facility operated by RTA WEIPA PTY LTD in QLD. Like all covered facilities, iron ore, gold and base metal mining uses significant diesel and electricity. Under Australia's Safeguard Mechanism, Rio Tinto Weipa must keep its annual emissions below a stepping-down baseline — or purchase carbon credits to cover any overage.

In 2023–24, Rio Tinto Weipa reported emissions of 270 kt against a baseline obligation of 256 kt — an overage of 14 kt. The facility covered the 14 kt overage by purchasing 14,025 Australian Carbon Credit Units (ACCUs) — credits generated by carbon abatement projects elsewhere in Australia such as soil carbon farming, avoided land clearing, and landfill gas capture.

Purchasing credits is legal and intended by the Safeguard Mechanism's design — the policy deliberately allows facilities to choose between cutting on-site emissions or funding abatement elsewhere in the economy. Whether credit purchases represent genuine long-term decarbonisation depends on whether the facility's absolute emissions are trending down over time. The chart above shows the trajectory since reporting began. This question applies to all covered facilities under the Safeguard Mechanism, not Rio Tinto Weipa specifically.

Across the metal ore mining sector, 8 of 8 covered facilities reported emissions above their baseline in 2023–24. The table below compares Rio Tinto Weipa with other metal ore mining facilities covered by the Safeguard Mechanism.