Today's API of 95 is not an encouraging last data point before the Games start tomorrow. I was just up at the Olympic Green and the air there is what my friend describes as "mashed potato air." Beijing API data since the car ban went into effect shown here:
No word yet on whether or not MEP will implement emergency pollution reduction measures. On the contrary, in some respects China doesn't seem all that worried, as evidenced by this article from Xinhua: "IOC: Beijing delivers on environmental promises."