Air-quality forecasting for the Pacific Northwest


AIRPACT-5 Speciated PM2.5 Performance

This tool provides AIRPACT-5 model performance comparisons of PM2.5 speciation data at IMPROVE and CSN sites. Measurements of SO4, NH4, NO3, EC, OC and total PM2.5 are compiled at sites where at least 5 valid model-monitor data pairs exist per month. Data from CSN lags by three months while IMPROVE data lags by up to 2 years. Graphics and statistics are updated on a monthly basis.

•   Select year:  

•   Select a chemical species:  

•   Site:  


Civil & Environmental Engineering, PO Box 642910, Washington State University, Pullman WA 99164-2910, 509-335-2576