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 2015 exceeded the standard as follows:

Air Zone 1

16 April 2015
Cromwell 60

18 April 2015
Cromwell 53

Air Zone 2

16 April 2015
Balclutha 51

17 April 2015
Milton 51

19 April 2015
Milton 58

For more information, see our AirInfo website.

Dr Gavin Palmer
Director Engineering, Hazards and Science