New Zealand Legislation: Regulations

13 Ambient air quality standards

• (1) The ambient air quality standard for a contaminant specified in the first column of the table in Schedule 1 is that the contaminant must not exceed its threshold concentration in an airshed unless the exceedance is a permissible exceedance.

  (2) The ambient air quality standard for a contaminant is breached if the contaminant exceeds its threshold concentration in an airshed and the exceedance is not a permissible exceedance.

  (3) In these regulations,—

  exceedance, for a contaminant, means an instance where the contaminant exceeds its threshold concentration in an airshed

  permissible exceedance, for a contaminant, means 1 of the number of exceedances allowed for the contaminant in an airshed as specified in the third column of the table in Schedule 1

  threshold concentration, for a contaminant, means the concentration of the contaminant specified in the second column of the table in Schedule 1 calculated as a mean for the time period specified in that column.

  Regulation 13: substituted, on 1 June 2011, by regulation 7 of the Resource Management (National Environmental Standards for Air Quality) Amendment Regulations 2011 (SR 2011/103).