Quote:
Originally Posted by Nell Plotts
The former cause of Eugene air quality issues was grass seed farmers burning their fields, and in my father's day the saw mill wigwam sawdust burners. Both burning practices are now prohibited/seriously controlled. Eugene sits at the southern end of the Willamette Valley and there are times when the winds don't scour out the air shed.
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Virtually any populated area in the Western US is subject to winter air stagnation -- when surficial (air pressure measured at the ground) High pressure systems park themselves over large areas of the US -- whether it's over Oregon/Idaho/Utah; Arizona/Nevada/California.
When these systems are present, storms are diverted into Canada, and also, south into southern CA, and winter winds are virtually non-existent.
This is called the "split jet stream" by TV meteorologists, map:
http://www.theweatherprediction.com/blocking/
I can recall several consecutive days of high pollution levels during the winter living in Seattle, Puyallup (WA), Corvallis (OR), Boulder City (NV), etc.
Even Puyallup, Washington never allows any indoor fireplace burning, ever, since prevailing winds from the S and SW are blocked from hills south of town.
In the summer, the Puyallup winds gust up to 30mph out of the NW and there are no issues.
In fact, conditions are so calm in Puyallup that the sulfur pollution from natural gas is noticeable!
If you require nearly pristine air quality, try areas with nearly constant synoptic scale atmospheric motions (i.e. rapidly moving fronts), such as areas in the Rocky Mountain states (such as Albuquerque, NM)..
On the other hand, if you suffer from Migraines, Epilepsy, or Depression, excess positive ions -- in such windy mountain areas -- can be detrimental for SOME patients like me, especially if you have blonde or red hair

(this wind-driven Ion effect is *NOT* true for EVERYONE!!!).
As a weather nut, I am curious about whether Eugene does have higher pollution than these other cities. I guess it's possible, but I'd have to do more research.
I can't imagine how Eugene could have higher air pollution than Tacoma/Seattle, L.A., Sacramento, or Vegas. I do recall that Corvallis had issues, but not nearly as severe as Vegas or Seattle.
Any stats on air pollution in Eugene ?