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Gisborne

The Gisborne region is located on the East Coast of New Zealand.  Gisborne City itself is coastal and receives fine ocean spray across the city during onshore (SW) wind conditions.  The prevailing wind direction is nor-westerly.  During winter, the majority of airborne pollutants come from the northerly direction.  During the colder winter months, household fires contribute most air pollutants.  

  

  There are two permanent air quality monitoring sites in Gisborne for a major pollutant of concern – PM10. These are located at the airport and at Gisborne Boys High and monitor the levels of PM10 in the air. On average over 24 hours our PM10 levels are within the National Environmental Standards (50 micrograms/cubic metre of air over 24 hours), but there are times of the day when they can be elevated above the health guidelines. This relates to peak times for car use (school drop offs, pick ups and commutes to and from work) and people starting up their wood burners/fires in the evening in winter. 

 

 Table: PM10 levels from Oates Road (Airport) and Gisborne Boys High School (GBHS) Monitoring Sites

Year

2006

2013

2014

2015

 

GBHS

Airport

GBHS

Airport

GBHS

Airport

GBHS

Airport

Annual Mean (ug/m3)

15.5

10.25

17

8.76

13

7.15

16

7.30

Minimum (ug/m3)

4.3

0.42

4

0.06

2

0.35

7

0.17

Maximum (ug/m3)

45.5

28.81

58

26.16

42

22.85

40

17.55

Days where PM10 was > 50 ug/m3 (National Standard)

0

0

1

0

0

0

0

0

                     

 Trends in PM10 Levels

Over the past three years of monitoring the winter peak has reduced – and this may reflect increasing uptake of heat pumps and more efficient low emission wood burners, as alternative heating sources which have been promoted and subsidised by central government.

 

Town Summary
Air quality in this town

Gisborne's airshed is not gazetted meaning that the air quality is generally very good with no exceedances of the 24 hour averages for PM10. Gisborne City is predominantly residential with limited areas of industry.

  • Population
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  • Number of households
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This information is collated from 2013 Census information. The census is the official count of how many people and dwellings there are in New Zealand. Census information is collated every five years.

Sources of air pollution

Home heating Industrial Outdoor burning Traffic Indoor sources Natural sources
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    Sources of PM10 emissions

    Source Annual percentage Winter day percentage
    Home heating Home heating {{summary.emissions.annualhome}}% {{summary.emissions.winterhome}}%
    Industrial Industrial {{summary.emissions.annualindustry}}% {{summary.emissions.winterindustry}}%
    Outdoor burning Outdoor burning {{summary.emissions.annualoutdoor}}% {{summary.emissions.winteroutdoor}}%
    Traffic Traffic {{summary.emissions.annualmotor}}% {{summary.emissions.wintermotor}}%
    Relative breakdown
    Annual
    Winter day

    The table shows the proportions of the main sources of PM10 in this town from home heating, industrial activities, outdoor burning and traffic.  (Indoor sources and natural sources of air pollutants are not included in this breakdown). 

    These values come from 2013 data sourced from MfE’s data service.  Consistent methodology was used to calculate these estimates of PM10 emissions, which allows comparison between towns throughout New Zealand.  Some regional council published emissions information might differ if they were prepared in a different year or used another method. Contact your regional council for more information about PM10 and other emissions.

Seasonal variation

  • Show wind speed
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Showing:

Concentration (µg/m3)


Wind speed (km/h)


Air temperature (℃)

What is this graph showing me?

The graph shows the monthly average PM10 concentration at one representative site in this town for the year selected. In many towns in New Zealand, PM10 peaks in the winter when air temperatures and wind speeds are lowest as more people heat their homes during colder weather, and still conditions mean that there is no wind to disperse the air pollutants.

Sites 2
Monitored sites in Gisborne

Monitored sites in this town can be categorised according to location:

  • Residential: Air monitoring site is in a suburban area with a relatively high population density, but not close to a busy road or industry.
  • Traffic: Air monitoring site is very close to a busy road or intersection.
  • Industry: Air monitoring site is close to industry, including heavy commercial and processing factories.
  • Coastal: Air monitoring site is close to the coast where there are high levels of sea salt in the air.
  • NES: A site monitored for compliance with the National Environmental Standards for Air Quality (NES-AQ).

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