Figure 13.1: Maximum PM₁₀ concentrations and guideline value exceedences from 1990 to 2001

Text description of figure

The figure shows the maximum PM10 concentrations for various locations in New Zealand, along with the number of days per year that PM10 concentrations are more than 50 microgrammes per cubic metre.

Maximum PM10 concentrations:

• Kaitaia 50-100 µg m^-3
• Auckland 50-100 µg m^-3
• Hamilton 50-100 µ m^-3
• Tauranga 0-50 µg m^-3
• Te Puke 0-50 µg m^-3
• Whakatane 50-100 µg m^-3
• Rotorua 50-100 µg m^-3
• Tokoroa 50-100 µg m^-3
• Gisborne 50-100 µg m^-3
• Napier 50-100 µg m^-3
• Upper Hutt 50-100 µg m^-3
• Lower Hutt 50-100 µg m^-3
• Wellington 0-50 µg m^-3
• Picton 0-50 µg m^-3
• Blenheim 50-100 µg m^-3
• Nelson 200+ µg m^-3
• Richmond 100-150 µg m^-3
• Christchurch 200+ µg m^-3
• Ashburton 0-50 µg m^-3
• Timaru 150-200 µg m^-3
• Oamaru 50-100 µg m^-3
• Queenstown 0-50 µg m^-3
• Wanaka 50-100 µg m^-3
• Alexandra 150-200 µg m^-3
• Dunedin 100-150 µg m^-3

The number of days per year that PM10 concentrations are more than 50 microgrammes per cubic metre, for a given location:

• Kaitaia 1-10
• Auckland - 10 to 20
• Hamilton 1-10
• Whakatane 1-10
• Rotorua 1-10
• Tokoroa 20-30
• Gisborne 1-10
• Napier 10-20
• Upper Hutt 10-20
• Lower Hutt 10-20
• Blenheim 1-10
• Nelson 75-100
• Richmond 50-75
• Christchurch 50-75
• Ashburton 1-10
• Timaru 40-50
• Alexandra 40-75