London - Post Report Question and Answers
Pollution index (Good, Moderate, Unhealthy, or Very Unhealthy)?
Moderate. Some days you can see the particles in the air, which is uncomfortable both to breathe and open your eyes in. My allergies worsened here but were fine with OTC medications. - Nov 2009
Moderate. - Mar 2009
There is a lot of pollution in London because of all the traffic and buses. - Sep 2008
The same as it would be in any East Coast city as far as I could tell. I have mild asthma but did not suffer any more difficulty than I did in New York. - Feb 2008