( 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 54 ppb on April 30.
NO2 air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 74 ppb on April 26.
PM10 air pollution was HIGH for 0 hours on 0 days, reaching a maximum 24-hour mean of 34 µg/m³ on April 8.
-------------------------------------------------------------------------------------------------------------------- | | | | | | | | | | | | | | | 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) | 7 | 0 | - | - | 0 | | | | | | | | | N(LOW) | 696 | 710 | - | - | 702 | | | | | | | | | | | | | | | | | | | | | | | 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 | 104 ppb | - ppm | - ppb | 184 µg/m³ | | | | | | | | | 99.9%ile 15-min | 53 ppb | 75 ppb | - ppm | - ppb | 123 µg/m³ | | | | | | | | | MAX hour | 54 ppb | 74 ppb | - ppm | - ppb | 108 µg/m³ | | | | | | | | | MAX 8-hour | 48 ppb | 40 ppb | - ppm | - ppb | 52 µg/m³ | | | | | | | | | MAX 24-hour | 42 ppb | 28 ppb | - ppm | - ppb | 34 µg/m³ | | | | | | | | | 99% dly max 24hr | 42 ppb | 28 ppb | - ppm | - ppb | 34 µg/m³ | | | | | | | | | MAX day | 42 ppb | 24 ppb | - ppm | - ppb | 31 µg/m³ | | | | | | | | | 90%ile day | 38 ppb | 20 ppb | - ppm | - ppb | 23 µg/m³ | | | | | | | | | AVERAGE | 28 ppb | 12 ppb | - ppm | - ppb | 15 µg/m³ | | | | | | | | | DATA CAPTURE | 98 % | 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%.
