A community group has urged the NSW EPA to lay charges against two mining companies for providing misleading air monitoring data and might launch proceedings itself if the agency doesn't act.
A court ruling that cost an Adelaide Brighton subsidiary $105,000 highlights the risks of overlooking sealed equipment when conducting maintenance checks.
The NSW government is considering new controls on diesel equipment and tougher mine rehabilitation requirements as part of efforts to improve air quality.
A company connected to a serial air polluter has had its mining licence suspended for continued failure to pay more than $0.5m as a security for rehabilitation costs.