In
December 2018 the place in England with the cleanest air was Windermere in
Cumbria. Readings naturally vary for several reasons, but a good average for
Windermere is a US AQI reading of 38. Other cities which often appear in the “top
10” are Barnstaple and Borehamwood who share the fifth spot with readings of
7.1 µg/m3 and coming in at number 7 is Gateshead with a 7.3 µg/m3
reading.