Sustainable climate and transport strategy

NO2 results for diffusion tube sites in Mayand June, 2022

21 September 2022

Your questions

1. Please provide NO2 results (raw data only) for the following diffusion tube (DT) sites for May, June, July 2022

(Please note that 2022 data for the same sites supplied for Jan - April, following previous FOI request)

  • DT1, DT2, DT3
  • DT 20, DT 21, DT 22
  • DT 46, DT 47, DT 48, DT 49
  • JP1, JP2, JP3
  • LO, LI

2. Please also supply any available PM2.5 levels at the above sites.

Our response

As requested, please find below the NO₂ results (raw data) for May and June for the mentioned diffusion tubes. We do not have the data for July yet.

Diffusion

Tube code

MAY readings

JUNE readings

µg/m3

ppb

µg NO₂ on tube

µg/m3

ppb

µg NO₂ on tube

DT1

No data (missing tube)*

No data (missing tube)*

DT2

No data (missing tube)*

No data (missing tube)*

DT3

62.55

64.85

57.35

32.64

33.85

29.93

3.81

3.95

3.50

69.40

58.58

57.58

36.22

30.58

30.05

3.42

2.86

2.81

DT20

120.80

63.05

7.38

No data (missing tube)

DT21

18.97

9.90

1.16

20.13

10.50

0.98

DT22

No data (missing tube)

No data (missing tube)

DT46

25.37

13.25

1.55

No data (missing tube)

DT47

39.19

20.45

2.40

28.98

15.11

1.41

DT48

<0.49

<0.26

<0.030

No data (missing tube)

DT49

18.80

9.81

1.14

31.99

16.70

1.57

JP1

No data (missing tube)

20.72

10.81

1.02

JP2

14.10

7.36

0.86

11.76

6.14

0.58

JP3

No data (missing tube)

13.12

6.85

0.64

LO

18.96

9.90

1.15

No data (missing tube)

LI

No data (missing tube)

14.47

7.55

0.70

Below are the PM2.5 results from the Lambeth – Brixton Road monitoring site, which is the same location that holds DT1, DT2, and DT3. We do not have the results for July yet. However, for ease of reference, we have attached a spreadsheet which contains the daily mean PM2.5 for the May – July period, which can been generated and downloaded from the LondonAir website.

May 2022

June 2022

PM2.5 particulates

Data capture rate (%):

99

87

Daily mean max (ug/m3):

20.4

15.9

Low days:

31

26

Moderate days:

0

0

High days:

0

0

Very high days:

0

0

Exceedences of EU Limit Values occurring during the quarter

Nitrogen Dioxide (hourly mean >200ug/m3)

There was one exceedence recorded during the quarter. This occurred on the following date: 17 Jun 2022 08:00 (218 ug/m3).