01-31-2013 04:00; PM2.5; 181.0; 231; Very Unhealthy (at 24-hour exposure at this level)
12:07 PM - 30 Jan 2013
0 replies
2 retweets
0 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.