East Herts Air Quality Data

On this page you can access live data quality monitoring data from key sites around East Herts district. You can also use the filters to find historic data, and search by specific pollutants. 

For reference, UK legislation requires the annual mean level of nitrogen dioxide (NO2) to be below 40 µg/m3 - micrograms per cubic meter. The national air quality target is a maximum concentration of 10µg/m3, to be met across England by 2040.

Automatic Monitoring Data

This is the data from the automatic monitoring station at Gascoyne Way Hertford. You can filter by date and pollutants.
Date & Time NO (µg/m3) NO2 (µg/m3) NOXasNO2 (µg/m3)
31/12/2025 8.10745 24.38438 36.81563
31/12/2025 9.57303 20.36813 35.04656
31/12/2025 3.64835 14.535 20.12906
31/12/2025 7.20316 17.35594 28.40063
31/12/2025 11.88053 22.08938 40.30594
31/12/2025 11.06979 24.62344 41.59688
31/12/2025 22.91914 32.65594 67.79813
31/12/2025 39.97597 34.13813 95.43375
31/12/2025 53.01025 34.99875 116.28
31/12/2025 8.10745 24.38438 36.81563
31/12/2025 9.57303 20.36813 35.04656
31/12/2025 3.64835 14.535 20.12906
31/12/2025 7.20316 17.35594 28.40063
31/12/2025 11.88053 22.08938 40.30594
31/12/2025 11.06979 24.62344 41.59688
31/12/2025 22.91914 32.65594 67.79813
31/12/2025 39.97597 34.13813 95.43375
31/12/2025 53.01025 34.99875 116.28
31/12/2025 45.77591 36.19406 106.38281
31/12/2025 25.1331 35.81156 74.34844
31/12/2025 6.7666 22.37625 32.75156
31/12/2025 4.49028 17.49938 24.38438
31/12/2025 2.71288 13.81781 17.9775
31/12/2025 3.58599 16.83 22.32844
31/12/2025 8.41928 26.01 38.91938
31/12/2025 24.91482 41.6925 79.89469
31/12/2025 30.43412 48.195 94.86
31/12/2025 30.09111 47.66906 93.80813
31/12/2025 21.32883 44.22656 76.93031
31/12/2025 21.29765 42.50531 75.16125
31/12/2025 26.50513 40.83188 81.4725
31/12/2025 19.36433 38.34563 68.03719
31/12/2025 15.65362 34.71188 58.71375
31/10/2025 4.17846 11.71406 18.12094
31/10/2025 4.02254 10.56656 16.73438
31/10/2025 5.67522 11.57063 20.2725
31/10/2025 5.1763 10.66219 18.59906
31/10/2025 6.4236 14.63063 24.48
31/10/2025 6.4236 13.86563 23.715
31/10/2025 17.86757 24.24094 51.6375
31/10/2025 24.04171 33.37313 70.23656
31/10/2025 17.83639 32.41688 59.76563
31/10/2025 4.17846 11.71406 18.12094
31/10/2025 4.02254 10.56656 16.73438
31/10/2025 5.67522 11.57063 20.2725
31/10/2025 5.1763 10.66219 18.59906
31/10/2025 6.4236 14.63063 24.48
31/10/2025 6.4236 13.86563 23.715
31/10/2025 17.86757 24.24094 51.6375
31/10/2025 24.04171 33.37313 70.23656

Diffusion Tube Monitoring Data

Across the district, diffusion tube tubes collect data that is analysed for pollutants. These give annual measurements that help to demonstrate how air quality is changing.  You can see a map of all the tubes in their locations on the homepage. 

Tube ID: eh96

Standon Road

Tube ID: eh95

Stortford Road

Tube ID: eh94

Potter Street

Tube ID: eh93

Station Road

Tube ID: eh92

South Street

Tube ID: eh91

London Road

Tube ID: eh90

Pye Corner

Tube ID: eh89

High Street

Tube ID: eh85

North Road

Tube ID: eh68

Hadham Road

Tube ID: eh70

High Street

Tube ID: eh73

Horseshoe Cott’s

Tube ID: eh79

Gascoyne Way

Tube ID: eh80

Gascoyne Way

Tube ID: eh81

Gascoyne Way

Tube ID: eh82

Bullocks Lane

Tube ID: eh83

Port Hill

Tube ID: eh84

North Road

Tube ID: eh86

North Road

Tube ID: eh87

Viaduct Road

Tube ID: eh88

High Street

Tube ID: eh57

Opp Bell Street

Tube ID: eh66

Rye Street

Tube ID: eh64

Rye Street

Tube ID: eh62

Northgate End

Tube ID: eh54

Station Road

Tube ID: eh40

London Rd

Tube ID: eh41

Ware Road

Tube ID: eh42 (co-located with eh29)

West Street

Tube ID: eh43 (co-located with eh29)

West Street

Tube ID: eh44 (co-located with eh29)

West Street

Tube ID: eh48

Castle Street

Tube ID: eh49

Castle Street

Tube ID: eh52

Cowbridge

Tube ID: eh53

Viaduct Road

Tube ID: eh38

Stanstead Rd

Tube ID: eh18

Stanstead Rd

Tube ID: eh19

London Rd

Tube ID: eh25

Old Cross

Tube ID: eh28

Castle Street

Tube ID: eh30

Tube ID: eh31

Hockerill St

Tube ID: eh32

Hockerill St

Tube ID: eh35

Dunmow Rd

Tube ID: eh36

Dunmow Rd

Tube ID: eh37

Stanstead Rd

Tube ID: eh39

London Rd

Tube ID: eh12

Hockerill St

Tube ID: eh17

Dunmow Rd