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Delhi: PM2.5 concentrations in μg/m3box plot = measured hourly averages from all public continuous monitoring stationsribbon plot = modeled hourly averages from WRF-CAMx chemical transport modeling systemIndia 24-hr outdoor standard is 60; WHO 24-hr outdoor guideline is 25; box color corresponds to India AQI codeModel schematics, inputs, and other resource material @ https://www.urbanemissions.info