( 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 67 ppb on May 6.
NO2 air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 43 ppb on May 15.
PM10 air pollution was HIGH for 14 hours on 2 days, reaching a maximum 24-hour mean of 81 µg/m³ on May 17.
-------------------------------------------------------------------------------------------------------------------- | | | | | | | | | | | | | | | 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 | - | - | 14 | | | | | | | | | N(MODERATE) | 61 | 0 | - | - | 37 | | | | | | | | | N(LOW) | 644 | 735 | - | - | 693 | | | | | | | | | | | | | | | | | | | | | | | N(HOUR) > AQS | N/A | 0 | - | - | N/A | | | | | | | | | N(8HOUR) > AQS | 25 | N/A | - | - | N/A | | | | | | | | | N(DAILY) > AQS | N/A | N/A | - | - | 3 | | | | | | | | | Ann Mean > AQS | N/A | 0 | - | - | 0 | | | | | | | | | | | | | | | | | | | | | | | MAX 15-min | 68 ppb | 82 ppb | - ppm | - ppb | 287 µg/m³ | | | | | | | | | 99.9%ile 15-min | 66 ppb | 72 ppb | - ppm | - ppb | 266 µg/m³ | | | | | | | | | MAX hour | 67 ppb | 43 ppb | - ppm | - ppb | 230 µg/m³ | | | | | | | | | MAX 8-hour | 60 ppb | 25 ppb | - ppm | - ppb | 160 µg/m³ | | | | | | | | | MAX 24-hour | 47 ppb | 23 ppb | - ppm | - ppb | 81 µg/m³ | | | | | | | | | 99% dly max 24hr | 47 ppb | 23 ppb | - ppm | - ppb | 81 µg/m³ | | | | | | | | | MAX day | 43 ppb | 20 ppb | - ppm | - ppb | 75 µg/m³ | | | | | | | | | 90%ile day | 40 ppb | 14 ppb | - ppm | - ppb | 36 µg/m³ | | | | | | | | | AVERAGE | 32 ppb | 9 ppb | - ppm | - ppb | 23 µg/m³ | | | | | | | | | DATA CAPTURE | 96 % | 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%.
