London Borough of Hillingdon Monitoring Data
Use the tabs below to explore information about the current and historic air pollution levels in this local authority.
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Days in each index band for London Borough of Hillingdon
Switch to AURN dataChoose a date period below to view a summary of how many days each site had in each index band.
The number of days in each index band for the following date period is shown below: 31/05/2019 - 30/05/2020
| Monitoring site | Index 1 Low |
Index 2 Low |
Index 3 Low |
Index 4 Moderate |
Index 5 Moderate |
Index 6 Moderate |
Index 7 High |
Index 8 High |
Index 9 High |
Index 10 Very High |
|---|---|---|---|---|---|---|---|---|---|---|
| Hillingdon 1 - South Ruislip (HI1) View pie chart | 214 | 135 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| London Hillingdon Oxford Avenue (HI3) View pie chart | 38 | 288 | 36 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
| London Hillingdon Harmondsworth (HIL1) View pie chart | 269 | 93 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| London Hillingdon Harmondsworth Os (HIL4) View pie chart | 256 | 70 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| London Hillingdon Hayes (HIL5) View pie chart | 59 | 238 | 53 | 7 | 4 | 1 | 1 | 1 | 1 | 0 |
| Heathrow LHR2 (LHR2) View pie chart | 148 | 204 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Heathrow Bath Road (LHRBR) View pie chart | 30 | 94 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hillingdon Sipson (SIPS) View pie chart | 312 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Heathrow Green Gates (T55) View pie chart | 257 | 100 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
