( 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 38 ppb on January 24.
NO2 air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 48 ppb on January 9.
PM10 air pollution was HIGH for 0 hours on 0 days, reaching a maximum 24-hour mean of 44 µg/m³ on January 18.
-------------------------------------------------------------------------------------------------------------------- | | | | | | | | | | | | | | | 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) | 744 | 724 | - | - | 343 | | | | | | | | | | | | | | | | | | | | | | | N(HOUR) > AQS | N/A | 0 | - | - | N/A | | | | | | | | | N(8HOUR) > AQS | 0 | N/A | - | - | N/A | | | | | | | | | N(DAILY) > AQS | N/A | N/A | - | - | 2 | | | | | | | | | Ann Mean > AQS | N/A | 0 | - | - | 0 | | | | | | | | | | | | | | | | | | | | | | | MAX 15-min | 39 ppb | 48 ppb | - ppm | - ppb | 68 µg/m³ | | | | | | | | | 99.9%ile 15-min | 39 ppb | 46 ppb | - ppm | - ppb | 68 µg/m³ | | | | | | | | | MAX hour | 38 ppb | 48 ppb | - ppm | - ppb | 63 µg/m³ | | | | | | | | | MAX 8-hour | 36 ppb | 35 ppb | - ppm | - ppb | 52 µg/m³ | | | | | | | | | MAX 24-hour | 34 ppb | 30 ppb | - ppm | - ppb | 44 µg/m³ | | | | | | | | | 99% dly max 24hr | 34 ppb | 30 ppb | - ppm | - ppb | 44 µg/m³ | | | | | | | | | MAX day | 32 ppb | 28 ppb | - ppm | - ppb | 41 µg/m³ | | | | | | | | | 90%ile day | 28 ppb | 27 ppb | - ppm | - ppb | 39 µg/m³ | | | | | | | | | AVERAGE | 14 ppb | 16 ppb | - ppm | - ppb | 22 µg/m³ | | | | | | | | | DATA CAPTURE | 100 % | 97 % | - % | - % | 50 % | | | | | | | | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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%.
