The Otago Regional Council is required under the Resource Management (National Environmental Standards for Air Quality) Regulations 2004 to report any breach of the ambient air quality standard.

The National Environmental Standard for 24-hour PM10 is 50 micrograms of particulate per cubic metre of air (mg/m3). PM10 concentrations in April 2014 exceeded the standard as follows:

Air Zone 1 - 30 April 2014

• Alexandra 56
• Cromwell 55
  
  

Matt Hickey
Manager Resource Science