Air Quality Binding - looking for testers

[rtvb (Robert)]

See this:

Air Quality not available for large parts of Europe since 19 June

For some time now, the air quality binding is not showing me information from near my home. I have looked at www.waqi.info and noticed that a really large number of stations is “offline” since 19 June. I guess there has been some update to the site or API that has caused this. I have already tried to get in contact with them, but no response (yet). Has anyone been able to get more information? [waqi] cc @kubawolanin