Hedley Environmental Index
Regardless of what you think you see driving to work these measurements show daily that Tung Chung is NOT one of the more polluted places to live. Check it out occasionally and you will see that the city locations are the worst, understandably, followed by the rest, of which Tung Chung is one of the best places in HKG with regards to the pollution.
These are not statistics they are real time readings of pollutants in the atmosphere at the locations mentioned.