Lead is one of six principal (or “criteria”) pollutants for which EPA has established NAAQS. EPA periodically reviews the scientific basis for these standards by preparing an ISA. The external review draft of the Pb ISA was reviewed by the Clean Air Scientific Advisory Committee (CASAC), an independent science advisory committee mandated by Section 109 (d) (2) of the Clean Air Act (CAA). The 2024 ...

The Integrated Science Assessment (ISA) for Particulate Matter is a concise synthesis and evaluation of the most policy-relevant science, and has been prepared as part of the review of the primary (health-based) and secondary (welfare-based) National Ambient Air Quality Standards (NAAQS) for Particulate Matter (PM) under the Clean Air Act. Welfare effects are non-health effects which, according to...

The Integrated Science Assessment for Ozone and Related Photochemical Oxidants is a concise synthesis and evaluation of the most policy-relevant science, and has been prepared as part of the review of the primary (health-based) and secondary (welfare-based) National Ambient Air Quality Standards (NAAQS) for Ozone and Related Photochemical Oxidants under the Clean Air Act. Welfare effects are non-h...

This final report provides the U.S. EPA’s evaluation and synthesis of the most policy-relevant science related to the health effects of gaseous oxides of nitrogen. It provides a critical part of the scientific foundation for the U.S. EPA’s decision regarding the adequacy of the current primary (health-based) national ambient air quality standards for nitrogen dioxide....

The Integrated Science Assessment for Sulfur Oxides – Health Criteria is a concise synthesis and evaluation of the most policy-relevant science, and has been prepared as part of the review of the primary (health-based) National Ambient Air Quality Standards (NAAQS) for Sulfur Oxides (SOx)under the Clean Air Act. The SOx ISA, in conjunction with additional technical and policy assessments, provides...

The document is a user guide for MOVES-Mexico, a version of the EPA's MOVES2014a model tailored for calculating vehicle emissions in Mexico. It covers installation instructions, unique features specific to Mexico like Geographic Bounds and Pollutants and Processes, execution at different scales, working with results, and tips for reducing execution time. Additionally, it references the U.S. MOVES ...

The "Methodological Guide for Atmospheric Emissions Inventory" by Ambiosis S.A. provides a comprehensive framework for compiling and categorizing data on atmospheric emissions in Chile. It details the classification of emission sources into various levels of aggregation and specifies methodologies for estimating emissions from stationary, mobile, and area sources. The guide aims to standardize the...

The "Inventory of Black Carbon and Criteria Pollutants in Colombia" was prepared by the Institute of Hydrology, Meteorology, and Environmental Studies (IDEAM) with contributions from various national and international organizations. The report outlines the methodology for calculating emissions, details the sources of black carbon and other pollutants, and presents the results of the emissions inve...

Previous studies in Bogotá have shown that emissions of resuspended particulate matter constitute a significant part of the emissions inventory and have considerable impact on air quality. This research estimates resuspended dust emission factors before, during and after the pavement process of a secondary road in Bogota. The estimation of resuspended dust emission factors was obtained from measur...

To assist countries in effectively addressing air pollution and developing emission inventories, this course aims to explain the importance of emission inventories for clean air policy development, the requirements for emission inventory reporting and methods for emission estimation....