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	Past 24 Hours


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	Outside air quality > History of air quality on the M5 East project > 2006 M5 East portal monitoring analysis > Tunnel air quality explained > Graphs > Live data > Historical data > Exceedances > Frequently asked questions > Glossary of terms > DECC Air quality data

Air Quality Monitoring - Last 24 Hours

Disclaimer

The data used on this page comes directly from the air monitoring stations. This data may be adjusted at a later time through a standardised procedure to account for instrument errors, power interruptions and the like.

Note: these figures have not been validated. To view the most recent validated data, please click here.

Station 2 (X1) - Hourly average readings for previous 24 hours.

Note: These figures have not been validated. To view the most recent validated data, please click here.
A grey background indicates that data is temporarily unavailable.

Date	Hour	CO ppm	NO₂ µg/m³	PM₁₀ µg/m³	Wind Direction	Wind Velocity km/h	PM₁₀ µg/m³ (daily avg)
23/11/09	9pm - 10pm	-0.01	8.2	7.6	S	11	18
23/11/09	10pm - 11pm	-0.02	8.2	9.6	S	8	18
23/11/09	11pm - 12am	-0.03	10.3	19.3	S	8	18
24/11/09	12am - 1am	-0.04	8.2	17.5	S	7	18
24/11/09	1am - 2am	-0.03		11.5	SSE	5
24/11/09	2am - 3am	-0.02	8.2	8.2	S	7
24/11/09	3am - 4am	-0.01	8.2	1.9	S	8
24/11/09	4am - 5am	0.00	6.2	13.5	S	9
24/11/09	5am - 6am	0.00	6.2	14.6	S	9
24/11/09	6am - 7am	0.01	10.3	18.1	S	9
24/11/09	7am - 8am	0.02	14.4	23.4	S	8
24/11/09	8am - 9am	0.04	14.4	19.8	S	8
24/11/09	9am - 10am	0.05	12.3	20.5	S	7
24/11/09	10am - 11am	0.05	22.6	19.4	S	5
24/11/09	11am - 12pm	0.06	10.3	10.8	S	8
24/11/09	12pm - 1pm	0.08	6.2	17.1	S	9
24/11/09	1pm - 2pm	0.09	6.2	5.9	S	9
24/11/09	2pm - 3pm	0.09	4.1	4.5	S	9
24/11/09	3pm - 4pm	0.09	6.2	6.3	S	8
24/11/09	4pm - 5pm	0.09	10.3	10.6	S	7
24/11/09	5pm - 6pm	0.08	10.3	10.1	S	6
24/11/09	6pm - 7pm	0.08	10.3	15.7	S	1
24/11/09	7pm - 8pm	0.07	8.2	19.3	S	5
24/11/09	8pm - 9pm	0.07	12.3	20.7	S	5

Station 3 (U1) - Hourly average readings for previous 24 hours.

Note: These figures have not been validated. To view the most recent validated data, please click here.
A grey background indicates that data is temporarily unavailable.

Date	Hour	CO ppm	NO₂ µg/m³	PM₁₀ µg/m³	Wind Direction	Wind Velocity km/h	PM₁₀ µg/m³ (daily avg)
23/11/09	9pm - 10pm	0.08	10.3	10.8	SSE	16	24
23/11/09	10pm - 11pm	0.08	8.2	11.5	SSE	15	24
23/11/09	11pm - 12am	0.07	10.3	23.0	S	11	24
24/11/09	12am - 1am	0.07	8.2	22.2	S	9	24
24/11/09	1am - 2am	0.07		15.8	SE	12
24/11/09	2am - 3am	0.07	8.2	11.7	SSE	12
24/11/09	3am - 4am	0.08	10.3	5.8	SSE	11
24/11/09	4am - 5am	0.08	8.2	15.9	SSE	13
24/11/09	5am - 6am	0.08	6.2	17.1	S	15
24/11/09	6am - 7am	0.08	10.3	21.3	S	13
24/11/09	7am - 8am	0.09	16.4	28.2	SSE	14
24/11/09	8am - 9am	0.16	22.6	27.1	SSE	13
24/11/09	9am - 10am	0.16	14.4	26.6	SSE	11
24/11/09	10am - 11am	0.16	18.5	14.3	SE	15
24/11/09	11am - 12pm	0.16	12.3	18.3	SSE	14
24/11/09	12pm - 1pm	0.17	6.2	22.0	SSE	16
24/11/09	1pm - 2pm	0.17	8.2	14.6	SSE	14
24/11/09	2pm - 3pm	0.17	6.2	9.0	SSE	14
24/11/09	3pm - 4pm	0.16	6.2	11.3	SSE	12
24/11/09	4pm - 5pm	0.10	8.2	13.6	SSE	12
24/11/09	5pm - 6pm	0.10	8.2	13.6	SSE	11
24/11/09	6pm - 7pm	0.10	10.3	19.8	SSE	10
24/11/09	7pm - 8pm	0.09	10.3	23.0	SSE	8
24/11/09	8pm - 9pm	0.09	14.4	23.6	SSE	10

Station 4 (T1) - Hourly average readings for previous 24 hours.

Note: These figures have not been validated. To view the most recent validated data, please click here.
A grey background indicates that data is temporarily unavailable.

Date	Hour	CO ppm	NO₂ µg/m³	PM₁₀ µg/m³	Wind Direction	Wind Velocity km/h	PM₁₀ µg/m³ (daily avg)
23/11/09	9pm - 10pm	0.11	20.5	14.7	SSE	7	27
23/11/09	10pm - 11pm	0.09	16.4	16.2	SSE	6	27
23/11/09	11pm - 12am	0.08	18.5	24.1	S	3	27
24/11/09	12am - 1am	0.06	14.4	24.1	SSW	2	27
24/11/09	1am - 2am	0.06		18.1	ESE	3
24/11/09	2am - 3am	0.06	10.3	15.8	SSE	5
24/11/09	3am - 4am	0.07	18.5	12.0	SSE	4
24/11/09	4am - 5am	0.07	18.5	20.2	SSE	5
24/11/09	5am - 6am	0.08	14.4	22.3	S	5
24/11/09	6am - 7am	0.10	20.5	23.4	S	6
24/11/09	7am - 8am	0.13	28.8	29.7	SSE	5
24/11/09	8am - 9am	0.17	32.9	31.4	SSE	6
24/11/09	9am - 10am	0.17	20.5	26.1	SSE	4
24/11/09	10am - 11am	0.18	26.7	23.0	SE	5
24/11/09	11am - 12pm	0.21	24.6	34.9	SSE	6
24/11/09	12pm - 1pm	0.22	16.4	24.8	SSE	8
24/11/09	1pm - 2pm	0.23	12.3	15.6	S	7
24/11/09	2pm - 3pm	0.24	14.4	12.6	S	7
24/11/09	3pm - 4pm	0.23	14.4	14.5	SSE	6
24/11/09	4pm - 5pm	0.22	16.4	17.3	SSE	6
24/11/09	5pm - 6pm	0.23	20.5	18.7	SSE	5
24/11/09	6pm - 7pm	0.23	22.6	25.8	SE	3
24/11/09	7pm - 8pm	0.22	18.5	27.3	SSE	2
24/11/09	8pm - 9pm	0.22	26.7	28.1	SSE	4
24/11/09	9pm - 10pm	0.23

Station 5 (CBMS) - Hourly average readings for previous 24 hours.

Note: These figures have not been validated. To view the most recent validated data, please click here.
A grey background indicates that data is temporarily unavailable.

Date	Hour	CO ppm	NO₂ µg/m³	PM₁₀ µg/m³	Wind Direction	Wind Velocity km/h	PM₁₀ µg/m³ (daily avg)
23/11/09	9pm - 10pm	0.12	8.2	11.9	SSE	13	23
23/11/09	10pm - 11pm	0.12	8.2	11.7	SSE	12	23
23/11/09	11pm - 12am	0.12	10.3	18.9	SSE	10	23
24/11/09	12am - 1am	0.12	10.3	25.5	SSE	9	23
24/11/09	1am - 2am	0.12		19.7	SE	10
24/11/09	2am - 3am	0.11	6.2	12.1	SE	11
24/11/09	3am - 4am	0.11	8.2	3.8	SSE	10
24/11/09	4am - 5am	0.10	6.2	19.4	SSE	11
24/11/09	5am - 6am	0.10	6.2	18.4	SSE	12
24/11/09	6am - 7am	0.10	12.3	26.3	SSE	12
24/11/09	7am - 8am	0.10	12.3	30.0	SSE	11
24/11/09	8am - 9am	0.10	16.4	27.1	SSE	10
24/11/09	9am - 10am	0.10	12.3	24.2	SSE	10
24/11/09	10am - 11am	0.09	12.3	18.3	SE	11
24/11/09	11am - 12pm	0.10	8.2	16.2	SSE	13
24/11/09	12pm - 1pm	0.09	8.2	19.0	SSE	13
24/11/09	1pm - 2pm	0.09	8.2	11.6	SSE	12
24/11/09	2pm - 3pm	0.08	6.2	6.5	SSE	14
24/11/09	3pm - 4pm	0.07	6.2	8.7	SSE	10
24/11/09	4pm - 5pm	0.06	8.2	12.0	SSE	10
24/11/09	5pm - 6pm	0.06	10.3	17.0	SSE	8
24/11/09	6pm - 7pm	0.07	10.3	21.4	SE	8
24/11/09	7pm - 8pm	0.06	12.3	26.7	SSE	6
24/11/09	8pm - 9pm	0.07	12.3	27.6	SSE	7
24/11/09	9pm - 10pm	0.07

M5 East Air quality