5 ms·
A bit more info, here's the EPA's PM2.5 scale: http://www.airnow.gov/index.cfm?action=pubs.aqguidepart http://www.airnow.gov/index.cfm?action=pubs.aqguidepart
by mikeyouse 12y ago
A bit more info, here's the EPA's PM2.5 scale:
http://www.airnow.gov/index.cfm?action=pubs.aqguidepart http://www.airnow.gov/index.cfm?action=pubs.aqguidepart
Above 100 is unhealthy for sensitive groups, above 150 is unhealthy for everyone, above 200 is very unhealthy, and above 300 is dangerous.
Here's China's current PM2.5 as relayed by the US Embassy (To prevent official tampering):
http://aqicn.org/city/beijing/us-embassy/m/ http://aqicn.org/city/beijing/us-embassy/m/
The average over the last 5 days is 150, the peak over the past 5 days was 201.
- seanmcdirmid 12y agoThis week has been sucky, I expected better. Anyways, the win will pick up today and we'll have a bit of clean air for a few hours, at least.
- seanmcdirmid 12y agoNever mind. Dust storm, pm2.5 is low, but the pm10 rating just shot up to 900! Shit.
- kruipen 12y agoWorth noting that the AQI scale you are citing (100, 150, etc.) and the ug/m3 used in the article are different numbers. AQI of 85 is not so bad. 85 ug/m3 isn't good.