The Wyoming air quality and meteorological monitoring instrumentation, and its operation are designed to follow EPA regulations and guidelines for monitoring. This ensures scientifically defensile data that can be compared to National Ambient Air Quality Standards, regulations, and guidelines include:

40CFR50 National Primary and Secondary Ambient Air Quality Standards

• Appendix A-1: Reference Measurement Principle and Calibration Procedure for the Measurement of Sulfur Dioxide in the Atmosphere (Ultraviolet Fluorescence Method)
• Appendix C: Measurement Principle and Calibration Procedure for the Measurement of Carbon Monoxide in the Atmosphere (Non-Dispersive Infrared Photometry)
• Appendix D: Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method)
• Appendix F: Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere (Gas Phase Chemiluminescence)
• Appendix J: Reference Method for the Determination of Particulate Matter as PM ₁₀ in the Atmosphere.
• Appendix L: Reference Method for the Determination of Fine Particulate Matter as PM _2.5 in the Atmosphere

All measurement devices and calibration standards will be traceable to the National Institute of Standards and Technology (NIST).

40CFR53 Ambient Air Monitoring Reference and Equivalent Methods

40CFR58 Ambient Air Quality Surveillance

• Appendix A: Quality Assurance Requirements for Monitors used in Evaluations of National Ambient Air Quality Standards
• Appendix C: Ambient Air Quality Monitoring Methodology
• Appendix D: Network Design Criteria for Ambient Air Quality Monitoring
• Appendix E: Probe and Monitoring Path Siting Criteria for Ambient Air Quality Monitoring

Ambient Air Monitoring Quality Assurance Guidance Documents

• Volume I: A Field Guide to Environmental Quality Assurance
• Volume II: Ambient Air Quality Monitoring Program
• Volume IV: Meteorological Measurements Version 2.0

These guidelines establish quality assurance and quality control (QA/QC) standards that provide data of known precision and accuracy.

Wyoming DEQ-Air Quality Division Parameter-Specific QAPPs

• Wyoming DEQ-AQD's Carbon Monoxide QAPP
• Wyoming DEQ-AQD's Meteorological QAPP
• Wyoming DEQ-AQD's Oxides of Nitrogen QAPP
• Wyoming DEQ-AQD's Ozone QAPP
• Wyoming DEQ-AQD's Particulate Matter QAPP
• Wyoming DEQ-AQD's Sulfur Dioxide QAPP
• Wyoming DEQ-AQD's Total Hydrocarbons QAPP

Real-Time Data Disclaimer

Air quality information and meteorology data are displayed on this Web page typically within one to three hours of their collection. As a result, data posted on the Live Sites Web page are raw data that have not been validated by human review and may contain errors. Real-time data must be interpreted with caution. These data are provided for public awareness and AQD review only. They should not be used in any medical or scientific study. Contact the Wyoming Department of Environmental Quality to obtain quality-assured quarterly data summaries or access to fully-validated raw data.