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Winton at Essex Street

The monitoring site at Centennial Park in Winton is a survey site, established to assess ambient air quality in the town.

The Winton at Essex Street monitoring site was first established in 2006 (High Vol), with PM10 monitoring continuing until 2010. The site was reinstated in 2013, when a continuous sampler (BAM-Thermo FH62) was installed to provide a better understanding of the diurnal variations in the town. In 2019, the continuous sampler was upgraded and the site now monitors PM2.5 concentrations (BAM-Thermo 5014i).

Scientific Indicators
Scientific data for this site

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

  • PM2.5
    • Hourly average
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    • Daily average
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    • Monthly average
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    • Annual average
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    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 green (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).

    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

    PM2.5 information

    • Hourly
    • Daily
    • Monthly
    • Annual
    • Exceedances
    • Show wind speed
    • Show temperature


    Concentration (µg/m3)

    Wind speed (km/h)

    Air temperature (℃)

    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 100% of the air quality guideline.  

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