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Mosgiel

The monitoring site has operated at an old industrial estate on Factory Rd since 2005. It is active all year round.

Air quality in Mosgiel is often degraded during wintertime due to increased domestic heating usage combined with industrial emissions. 

Results indicate air quality does not meet the National Environmental Standard for PM10 between 6-8 days each year. Air quality may be declining as Mosgiel’s population grows.

There can be considerable variation in air quality across Mosgiel during winter evenings, although the peak values can be found in the residential areas towards the north and west. The prevailing winds on nights with poor air quality generally come from the northeast through southeast, pushing particulates towards the western side of town.

Temperature inversions can commonly form in winter to create conditions that discourage dispersion, allowing PM10 to accumulate.

 

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
    • 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 PM10?

    The dashboard colours show how PM10 levels sit in relation to the guideline – from green (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).  

    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

    PM10 information

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

    Guideline


    Concentration (µg/m3)


    Wind speed (km/h)


    Air temperature (℃)

    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 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