( Note: These data are provisional ; fully ratified results will be available later. )
Ozone air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 51 ppb on April 22.
NO2 air pollution was HIGH for 0 hours on 0 days, reaching a maximum hourly mean of 41 ppb on April 21.
PM10 air pollution was HIGH for 0 hours on 0 days, reaching a maximum 24-hour mean of 26 µg/m³ on April 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) | 5 | 0 | - | - | 0 | | | | | | | | | N(LOW) | 693 | 680 | - | - | 620 | | | | | | | | | | | | | | | | | | | | | | | 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 | 52 ppb | 43 ppb | - ppm | - ppb | 56 µg/m³ | | | | | | | | | 99.9%ile 15-min | 51 ppb | 39 ppb | - ppm | - ppb | 40 µg/m³ | | | | | | | | | MAX hour | 51 ppb | 41 ppb | - ppm | - ppb | 40 µg/m³ | | | | | | | | | MAX 8-hour | 48 ppb | 30 ppb | - ppm | - ppb | 31 µg/m³ | | | | | | | | | MAX 24-hour | 42 ppb | 23 ppb | - ppm | - ppb | 26 µg/m³ | | | | | | | | | 99% dly max 24hr | 42 ppb | 23 ppb | - ppm | - ppb | 26 µg/m³ | | | | | | | | | MAX day | 41 ppb | 21 ppb | - ppm | - ppb | 22 µg/m³ | | | | | | | | | 90%ile day | 38 ppb | 14 ppb | - ppm | - ppb | 19 µg/m³ | | | | | | | | | AVERAGE | 30 ppb | 10 ppb | - ppm | - ppb | 14 µg/m³ | | | | | | | | | DATA CAPTURE | 97 % | 94 % | - % | - % | 86 % | | | | | | | | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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%.
