Are Stockton Air Quality Monitoring Results a Cause for Concern?

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An air monitoring station at Stockton measures PM10, PM2.5, NH3, NO2, NOx and has been operational for 8 months. There have been 20 failures of the PM10 50 ug/m3 criteria and 1 failure of PM2.5 25 ug/m3 advisory. Is this a cause for concern.

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