( Note: These data have been fully ratified by AEA Technology, NETCEN. )
Ozone air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 42 ppb on February 6.
NO2 air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 40 ppb on February 14.
PM10 air pollution was HIGH for 0 hours on 0 days, reaching a maximum 24-hour mean of 27 µg/m³ on February 16.
-------------------------------------------------------------------------------------------------------------------- | | | | | | | | | | | | | | | POLLUTANT | O3 | NO2 | CO | SO2 | PM10 | | | | | | | | | | | | | | | | | This | This | This | This | This | | | | | | | | | | Period | Period | Period | Period | Period | | | | | | | | | | | | | | | | N(V. HIGH) | 0 | 0 | - | - | 0 | | | | | | | | | N(HIGH) | 0 | 0 | - | - | 0 | | | | | | | | | N(MODERATE) | 0 | 0 | - | - | 0 | | | | | | | | | N(LOW) | 672 | 664 | - | - | 672 | | | | | | | | | | | | | | | | | | | | | | | N(HOUR) > AQS | N/A | 0 | - | - | N/A | | | | | | | | | N(8HOUR) > AQS | 0 | N/A | - | - | N/A | | | | | | | | | N(DAILY) > AQS | N/A | N/A | - | - | 0 | | | | | | | | | Ann Mean > AQS | N/A | 0 | - | - | 0 | | | | | | | | | | | | | | | | | | | | | | | MAX 15-min | 44 ppb | 43 ppb | - ppm | - ppb | 59 µg/m³ | | | | | | | | | 99.9%ile 15-min | 42 ppb | 41 ppb | - ppm | - ppb | 52 µg/m³ | | | | | | | | | MAX hour | 42 ppb | 40 ppb | - ppm | - ppb | 53 µg/m³ | | | | | | | | | MAX 8-hour | 41 ppb | 36 ppb | - ppm | - ppb | 34 µg/m³ | | | | | | | | | MAX 24-hour | 39 ppb | 33 ppb | - ppm | - ppb | 27 µg/m³ | | | | | | | | | 99% dly max 24hr | 39 ppb | 33 ppb | - ppm | - ppb | 27 µg/m³ | | | | | | | | | MAX day | 39 ppb | 32 ppb | - ppm | - ppb | 25 µg/m³ | | | | | | | | | 90%ile day | 30 ppb | 27 ppb | - ppm | - ppb | 23 µg/m³ | | | | | | | | | AVERAGE | 17 ppb | 16 ppb | - ppm | - ppb | 15 µg/m³ | | | | | | | | | DATA CAPTURE | 99 % | 99 % | - % | - % | 99 % | | | | | | | | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Note : Exceedences of PM10 Air Quality Standards (AQS) are based on gravimetric equivalent data.
All other PM10 statistics are based on TEOM data and may therefore under-read gravimetric results by 30%.
