The following Web pages provide assessments and reports of ambient air quality data. Note: the assessments and reports presented are intended to help inform the quality of the data for the ambient air monitoring and quality assurance communities. For convenience, these assessments and reports are publicly available (i.e., they do not require a user-name and password).

Particulate Matter (PM) Monitoring Assessments and Reports

• PM2.5 Continuous Monitor Comparability Assessments
• PM10 Continuous Monitor Comparability Assessments 
• PM2.5 FRM Data Quality Dashboard Exit
• Chemical Speciation Network Annual Site ReportsExit
• IMPROVE Annual Site Reports Exit

Gaseous Monitoring Assessments 

• Single Point Precision and Bias Report 
• Carbon Monoxide (CO) Data Quality Dashboard Exit
• Nitrogen Dioxide (NO2) Data Quality Dashboard Exit
• Nitric Oxide (NO) Data Quality Dashboard Exit
• Ozone (O3) Data Quality DashboardExit
• Sulfur Dioxide (SO2) Data Quality Dashboard Exit
• Total Reactive Nitrogen (NOy) Data Quality DashboardExit

Network Assessment Application 

• NetAssess2020 Exit