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Wellington Central (Willis Street)

This site was established in early 2015 and replaces the old Wellington Central (Corner V) monitoring site. This site primarily measures the impact of urban motorway traffic emissions on air quality using nitrogen dioxide and carbon monoxide as indicators. PM10 and PM2.5 are also measured.

⚠️ Air quality data from Greater Wellington monitoring sites are currently unable to be displayed on LAWA due to a data server issue.  In the meantime, please see https://graphs.gw.govt.nz/ for air quality data.

This site primarily measures the impact of traffic emissions on local air quality beside a busy road in the inner city. The site is very exposed to the wind so air pollution levels don't build up as much as they would if the site was  on a street enclosed by tall buildings. 

 

Scientific Indicators
Scientific data for this site

This dashboard shows information on the data collected by the regional councils for air quality scientific indicators:

  • PM10 Data verified to 31/12/2021
    • Hourly average
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    • Daily average
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    • Monthly average
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    • Annual average
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    • Exceedance
      2023
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      Exceedance
      2023
      Year to date
      No Data
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    What do the dashboard colours mean for PM10?

    The dashboard colours show how PM10 levels sit in relation to guidelines – from dark blue (less than 10%) to red (more than 100% of the guideline).  The guideline (100%) value for the daily average PM10 is 50 µg/m3 and  20 µg/m3  for the annual average.  There are no guidelines for hourly or monthly data (charcoal colour). 

    If a site has less than two days of PM10 exceedances each year, this is compliant with the NES-AQ.  If there are two or more exceedances annually, then the site does not comply with the NES-AQ.

    Colour Percent of guidelines
    Less than 10% of guideline
    10-33% of guideline
    33-66% of guideline
    66-100% of guideline
    Greater than 100% of guideline
    No guideline
    Colour Number of exceedances permitted
    Compliant
    Non-compliant

    PM10 information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Exceedances
    • Show wind speed
    • Show temperature
    Months:
    -
    Showing:

    Guideline


    Concentration (µg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how levels of PM10 change on an hourly, daily, monthly or annual basis for the selected time period. The levels depend on local sources of emissions and what the weather is doing.  Emissions from various sources change, depending on whether it’s a weekday or the weekend or at different times of the year (e.g. emissions from home heating goes up in the cold winter months).  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.   The PM10 concentrations are shown against the guidelines for air quality (for daily and annual averages), and where concentrations exceed the guideline (red line) this can be a cause for concern, especially if this occurs on a frequent basis.   

    Exceedance data (when available) shows the number of days per year that the concentrations went above 50 µg/m3.  

    The World Health Organization published new guidelines in September 2021 of 45 µg/m3 for daily averages and 15 µg/m3 for annual averages.

    For information about allowable exceedances and targets, and the limitations of data shown, see the Factsheet on monitoring air quality in New Zealand

  • PM2.5 Data verified to 31/12/2021
    • Hourly average
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    • Daily average
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    • Monthly average
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    • Annual average
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    • Exceedance
      2023
      Year to date
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      Exceedance
      2023
      Year to date
      No Data
    Show more information Hide information

    What do the dashboard colours mean for PM2.5?

    The dashboard colours show how PM2.5 levels sit in relation to the guideline – from dark blue (less than 10%) to red (over the guideline).  The guideline (100%) value for  the daily average PM2.5 is 25 µg/mand 10 µg/m3 for the annual average.  There are no guidelines for hourly or monthly data (charcoal colour).

    If a site has less than four days of PM2.5 exceedances each year, this is compliant with World Health Organization 2005 guidelines.  If there are four or more exceedances annually, then the site does not comply with these guidelines.

    Colour Percent of guidelines
    Less than 10% of guideline
    10-33% of guideline
    33-66% of guideline
    66-100% of guideline
    Greater than 100% of guideline
    No guideline
    Colour Number of exceedances permitted
    Compliant
    Non-compliant

    PM2.5 information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Exceedances
    • Show wind speed
    • Show temperature
    Months:
    -
    Showing:

    Guideline


    Concentration (µg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how levels of PM2.5 change on an hourly, daily, monthly or annual basis for the selected time period.  Emissions from various sources change, depending on whether it’s a weekday or the weekend or at different times of the year (e.g. emissions from home heating goes up in the cold winter months).  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.   The PM2.5 concentrations are shown against the guidelines for air quality (for daily and annual averages), and where concentrations exceed 100% of the guideline (red line) this can be a cause for concern, especially if this occurs on a frequent basis.  

    Exceedance data (when available) shows the number of days per year that the concentrations went above 25 µg/m3.  

    The World Health Organization published new guidelines in September 2021 of 15 µg/m3 for daily averages and 5 µg/m3 for annual averages.

    For information about allowable exceedances and targets, and the limitations of data shown, see the Factsheet on monitoring air quality in New Zealand

  • Nitrogen dioxide Data verified to 31/12/2021
    • Hourly average
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      hour to {{data.DateTime | date:'h:mm a'}}
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    • Daily average
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    • Monthly average
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    • Annual average
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    • Exceedance
      2023
      Year to date
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      Exceedance
      2023
      Year to date
      No Data
    Show more information Hide information

    What do the dashboard colours mean for nitrogen dioxide?

    The dashboard colours show how nitrogen dioxide levels sit in relation to these guidelines – from dark blue (less than 10%) to red (over the guideline).  The guideline (100% value) for the hourly average is 200 µg/m3, for the daily average 100 µg/m3, and 4µg/m3 for the annual average.  There are no guidelines for monthly data (charcoal colour).

     

    Colour Percent of guidelines
    Less than 10% of guideline
    10-33% of guideline
    33-66% of guideline
    66-100% of guideline
    Greater than 100% of guideline
    No guideline
    Colour Number of exceedances permitted
    Compliant
    Non-compliant

    Nitrogen dioxide information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Exceedances
    • Show wind speed
    • Show temperature
    Months:
    -
    Showing:

    Guideline


    Concentration (µg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how levels of nitrogen dioxide change on an hourly, daily, monthly or annual basis for the selected time period.  Emissions from various sources change, depending on whether it’s a weekday or the weekend or at different times of the year (e.g. emissions from home heating goes up in the cold winter months).  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.   The nitrogen dioxide concentrations are shown against the guidelines for air quality (for hourly, daily and annual averages), and where concentrations exceed 100% of the guideline (red line) this can be a cause for concern, especially if this occurs on a frequent basis.  

    Exceedance data (when available) shows the number of hours per year that the concentrations went above 200 µg/m3.  

    The World Health Organization published new guidelines in September 2021 of 25 µg/m3 for daily averages and 10 µg/m3 for annual averages.

    For information about allowable exceedances and targets, and the limitations of data shown, see the Factsheet on monitoring air quality in New Zealand

  • Carbon monoxide Data verified to 31/12/2021
    • Hourly average
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      hour to {{data.DateTime | date:'h:mm a'}}
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    • Daily average
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    • Monthly average
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    • Annual average
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      {{data.Text}}
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    Show more information Hide information

    What do the dashboard colours mean for carbon monoxide?

    The dashboard colours show how carbon monoxide levels sit in relation to the guideline – from dark blue (less than 10%) to red (over the guideline).  The guideline (100% value) for the hourly average carbon monoxide is 30 mg/m3.  There are no guidelines for daily, monthly or annual data (charcoal colour). 

    Colour Percent of guidelines
    Less than 10% of guideline
    10-33% of guideline
    33-66% of guideline
    66-100% of guideline
    Greater than 100% of guideline
    No guideline
    Colour Number of exceedances permitted
    Compliant
    Non-compliant

    Carbon monoxide information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Show wind speed
    • Show temperature
    Months:
    -
    Showing:

    Guideline


    Concentration (mg/m3)


    Wind speed (km/h)


    Air temperature (℃)


    Guideline

    What is this graph showing me?

    This graph shows how levels of carbon monoxide change on an hourly, daily, monthly or annual basis for the selected time period. The levels depend on local sources of emissions and what the weather is doing.  Emissions from various sources change, depending on whether it’s a weekday or the weekend or at different times of the year (e.g. emissions from home heating goes up in the cold winter months).  Still conditions often lead to high concentrations, as there is no wind to blow away the pollutants in the air.  The carbon monoxide concentrations are shown against the guidelines for air quality (hourly), and where concentrations exceed 100% of the guideline (red line) this can be a cause for concern, especially if this occurs on a frequent basis. 

    The World Health Organization published new guidelines in September 2021 of 4 mg/m3 for daily averages.

    For information about allowable exceedances and targets, and the limitations of data shown, see the Factsheet on monitoring air quality in New Zealand