Air Quality
07-31-25 | 01:44 PM
#27
Disco Infiltrator
Joined: May 2013
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From: Folsom CA
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It's pretty badly done, isn't it? Once you parse the two pages, it's a linear interpolation table for each pollutant. Then the highest one is reported. So they could all five be at 149 and it wouldn't make it 150
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."
Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."
07-31-25 | 02:19 PM
#29
Randomhead
Joined: Aug 2008
Posts: 25,930
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From: Happy Valley, Pennsylvania
For my purposes just seeing a rough measure is good enough. Meteorology is a highly developed science, but I guess it doesn't surprise me that the formula for AQI isn't that great. But I thought I saw it was an average over 24 hours when I was trying to figure out why PM2.5 was so much higher than I thought AQI was. Since pollution goes down outside of business hours, it would tend to be lower than PM2.5 or other measurements that have a shorter time scale.
07-31-25 | 02:24 PM
#30
ignominious poltroon
Joined: Jan 2022
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The time-averaging smooths out (or at least minimizes) the spikes. The yurt-fscks would periodically stoke their wood stove, and the 2.5 reading would spike into the instantaneous lung cancer level, but would disappear in the time-average. One of the nice things about the detector is it allows you to access all of the data, not just the time-averages.
07-31-25 | 04:12 PM
#31
Klaatu..Verata..Necktie?
Joined: May 2007
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From: SF Bay Area
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The time-averaging smooths out (or at least minimizes) the spikes. The yurt-fscks would periodically stoke their wood stove, and the 2.5 reading would spike into the instantaneous lung cancer level, but would disappear in the time-average. One of the nice things about the detector is it allows you to access all of the data, not just the time-averages.
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