( 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 51 ppb on September 11.
NO2 air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 29 ppb on September 10.
PM10 air pollution was HIGH for 0 hours on 0 days, reaching a maximum 24-hour mean of 24 µg/m³ on September 12.
-------------------------------------------------------------------------------------------------------------------- | | | | | | | | | | | | | | | 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) | 1 | 0 | - | - | 0 | | | | | | | | | N(LOW) | 688 | 688 | - | - | 648 | | | | | | | | | | | | | | | | | | | | | | | 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 | 55 ppb | 36 ppb | - ppm | - ppb | 45 µg/m³ | | | | | | | | | 99.9%ile 15-min | 52 ppb | 32 ppb | - ppm | - ppb | 37 µg/m³ | | | | | | | | | MAX hour | 51 ppb | 29 ppb | - ppm | - ppb | 34 µg/m³ | | | | | | | | | MAX 8-hour | 44 ppb | 20 ppb | - ppm | - ppb | 27 µg/m³ | | | | | | | | | MAX 24-hour | 32 ppb | 14 ppb | - ppm | - ppb | 24 µg/m³ | | | | | | | | | 99% dly max 24hr | 32 ppb | 14 ppb | - ppm | - ppb | 24 µg/m³ | | | | | | | | | MAX day | 24 ppb | 14 ppb | - ppm | - ppb | 23 µg/m³ | | | | | | | | | 90%ile day | 22 ppb | 12 ppb | - ppm | - ppb | 14 µg/m³ | | | | | | | | | AVERAGE | 17 ppb | 8 ppb | - ppm | - ppb | 11 µg/m³ | | | | | | | | | DATA CAPTURE | 96 % | 96 % | - % | - % | 93 % | | | | | | | | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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%.
