7.4.1 Ambient Air* Quality

Policy 7-1: National Environmental Standards^

The National Environmental Standards^ set out in Table 7.1 must be adopted as ambient air* quality standards for the Region and ambient air* quality must be:
  1. maintained or enhanced in those areas which meet the standards, and
  2. enhanced in those airsheds which do not meet the standards
in accordance with the air quality categories and designated responses in Table 7.2.

Table 7.1 National Environmental Standards^ for Ambient Air* Quality3
Type and Quantity 2018-19
Annual Fee
Benign Discharge Nil
Discharge to Land <25 171
Discharge to Land>25 to 50 227
Discharge to Land >50 to 100 341
Discharge to Land >100 to 200 465
Discharge to Land >200 to 1,000 1,516
Discharge to Land >1,000 to 10,000 1,705
Discharge to Land 10,000+ 1,895
Discharge to Water <25 341
Discharge to Water>25 to 50 455
Discharge to Water >50 to 100 682
Discharge to Water >100 to 200 910
Discharge to Water >200 to 1,000 3,032
Discharge to Water >1,000 to 10,000 3,411
Discharge to Water 10,000+ 3,790
Unspecified Volume Discharge 1,895
Land Fill – High impact 3,790
Land Fill – Medium impact 568
Land Fill – Low impact 189
Contaminant^ Threshold Concentration Permissible Excess
Carbon monoxide 10 mg/m3
(running 8-hour mean)
One 8-hour period in any 12-month period
Nitrogen dioxide 200 µg/m3
(1-hour mean)
Nine 1-hour periods in any 12-month period
Ozone 150 µg/m3
(1-hour mean)
Not to be exceeded at any time
Fine particles (PM10*) 50 µg/m3
(24-hour mean)
One 24-hour period in any 12-month period
Sulphur dioxide 350 µg/m3
(1-hour mean)
Nine 1-hour periods in any 12-month period
  570 µg/m3
(1-hour mean)
Not to be exceeded at any time
 
Table 7.2 Air Quality Categories and Designated Response
Category Measured Value Designated Response
Unacceptable Greater than the threshold concentration in the National Environmental Standards^ for Air Quality, and exceeds the permissible excess in Table 7.1
  • Enhance
  • Establish long-term strategy
  • Monitor
  • Publicly notify exceedances
Degraded 66% to 100% of the threshold concentration in the National Environmental Standards^ for Air Quality in Table 7.1, with one exceedance
  • Maintain, and enhance where practicable
  • Establish awareness programmes
  • Monitor where practicable
Acceptable Up to 66% of the threshold concentration in the National Environmental Standards^ for Air Quality in Table 7.1, with one exceedance
  • Maintain

3    Resource Management (Environmental Standards Relating to Certain Air Pollutants, Dioxins, and Other
      Toxics) Regulations 2004.


Policy 7-2: Regional standards for ambient air* quality

In addition to the National Environmental Standards^ set out in Policy 7-1, ambient air* quality must be managed in accordance with the regional standards set out in Table 7.3.
 
Table 7.3 Regional Standards for Ambient Air* Quality
Contaminant^ Regional Standard
Odour
  • A discharge^ must not cause any offensive or objectionable odour beyond the property* boundary.
Dust
  • A discharge^ must not cause any noxious, offensive or objectionable dust beyond the property* boundary.
Smoke and water^ vapour
  • A discharge^must not result in any objectionable or offensive smoke or water^ vapour beyond the property* boundary.
Agrichemicals*
  • A discharge^must not give rise to noxious or dangerous levels of agrichemicals* in terms of human health, non-target plants or animals, or property*.
Gases and other airborne contaminants^
  • A discharge^ must not result in noxious or dangerous levels of gases or other airborne contaminants^ beyond the property* boundary.

Note: There are guidelines contained within Chapter 15, Section 15.2 that assist in defining the terms noxious, dangerous, offensive and objectionable.


Policy 7-3: Regulation of discharges^ to air

Discharges^ of contaminants^ into air will be generally allowed, provided:
  1. the effects^ of the discharge^ are consistent with the approach set out in Policy 7-1 for implementing the National Environmental Standards^ for ambient air* quality, and
  2. the discharge^ is consistent with the regional standards for ambient air* quality set out in Policy 7-2.

Policy 7-4: Incompatible land^ uses
Air quality problems arising from incompatible land^ uses establishing near each other must be avoided, remedied or mitigated primarily through district plans^ and Territorial Authority^ consent decisions which:
  1. prevent the future establishment of potentially incompatible land^ use activities near each other, or
  2. allow the establishment of potentially incompatible land^ use activities near each other provided no existing lawful activity, operated in a manner that adopts the best practicable option^ or which is otherwise environmentally sound, is restricted or compromised.