Hacker News Reader

38 mins after this was posted it looks like Portland passed San Francisco by. Portland is at 220, SF is at 181.

It's been fluctuating throughout the day. PurpleAir is showing even worse levels in SF currently (over 300 US PM2.5 AQI).

Yea - the title of the article is definitely a click bait. If the positions are going to switch so fast, there is no point in calling that out.

Updated title to include Portland.