air quality standard Articles

  • National Ambient Air Quality Standards Update

    You have seen ALL4 documenting the corresponding evolution of the NAAQS levels since the current U.S. EPA administration started in January 2009, and we will continue to follow them closely and provide you with updates that we think are important to your operations.  The following sections provide updates on the most important NAAQS and how you can plan for them today.  Discusses SO2, ...


    By All4 Inc.

  • Air quality in America

    Although most Americans tell pollsters they believe air pollution in the United States is getting worse, the reality is quite different. In 'Air Quality in America: A Dose of Reality on Air Pollution Levels, Trends, and Health Risks' (AEI Press, January 2008) environmental scientist Joel Schwartz and political scientist Steve Hayward demonstrate why air pollution has been dropping steadily for ...


    By Blue Sky Consulting Group

  • Air Quality Monitoring

    Why monitor air quality? Well, to monitor is to know. Everything else is just more or less qualified guesses. International, national and local air quality targets and limits are also tied to monitoring results. What is Air Quality? How is air quality ...


    By Opsis AB

  • Air Quality Monitoring

    Why monitor air quality? Well, to monitor is to know. Everything else is just more or less qualified guesses. International, national and local air quality targets and limits are also tied to monitoring results What is Air Quality? How is air quality characterised? It is quite common to find air quality indexes, where the ranges are divided in sections indicating ...


    By Opsis AB

  • New American air quality standards focus on public health

    The US Environmental Protection Agency has significantly strengthened its national ambient air quality standards (NAAQS) for ground-level ozone, the primary component of smog. These changes will improve both public health protection and the protection of sensitive trees and plants. Based on its review of the air quality criteria for ozone (O3) and related photochemical oxidants and national ...

  • What is sustainable air quality?

    For 40 years or more, air quality policy has been based on the paradigm of the air quality standard as a uniform criterion of acceptable environmental degradation, built on the foundations of the precautionary principle. However, developments in health science have undermined some of the underlying assumptions of this paradigm whilst technological emission controls have been offset by growing ...


    By Inderscience Publishers

  • EPA’s proposal to revise the air quality standards for ground-level ozone

    OnJune 20, 2007, the U.S. Environmental Protection Agency (EPA) proposed to strengthen the nation’s air quality standards for ground-level ozone. Recent scientific literature has improved our understanding of the adverse effects of ozone on both human health and the environment. This article summarizes the latest scientific knowledge on the effects of ozone and the key aspects of EPA’s proposal ...

  • Will the Circle Be Unbroken: A History of the U.S. National Ambient Air Quality Standards

    ABSTRACT In celebration of the 100th anniversary of the Air & Waste Management Association, this review examines the history of air quality management (AQM) in the ...

  • Expansion yields quality standards in Europe

    ' No aerosols/odors, maintenance savings, turndown capability, and improved treatment' resulted with the AIRE-O2® aerators, reported the engineer Problem This European chemical company’s propylene oxide/tertiary butyl alcohol plant decided to expand its activated sludge system. The existing 1.58 MG (6,000 m 3) concrete basin had reached capacity. Also, three 60 hp (45 kW) surface ...

  • New Nitrogen Dioxide Ambient Air Quality Standard Could Pose Challenges

    In the more than 200 air quality modeling analyses that ALL4 meteorologists have conducted, demonstrating compliance with the annual nitrogen dioxide (NO2) National Ambient Air Quality Standard (NAAQS) of 53 parts per billion (ppbv) has rarely been an issue.  The relative ease for demonstrating compliance with the annual NO2 NAAQS is due to two (2) factors.  First, the ...


    By All4 Inc.

  • Air quality in Europe — 2012 report

    'Air pollution is bad for our health. It reduces human life expectancy by more than eight months on average and by more than two years in the most polluted cities and regions. Member States must comply with EU air quality standards quickly and reduce air pollutant emissions,' Janez Potočnik, EU Commissioner for the Environment (EU, 2010a). Emissions of air pollutants derive from almost all ...

  • Synergistic effects of pollutants on air quality

    The Pollutant Standards Index (PSI) was developed in the USA to give the public an overall assessment of the air quality on a regular basis. Currently, the PSI does not include the synergistic effects of the major air pollutants. Synergism applies when the damage caused by two or more pollutants, either to human health or property, is greater than the effect or damage caused by each individual ...


    By Inderscience Publishers

  • 2013: a ‘perfect storm’ in air quality

    As many countries fail to meet air quality targets and large numbers of premature deaths still result from air pollution, Jim Mills, a particulate monitoring specialist and Managing Director of Air Monitors, explains why 2013 will be a pivotal year. In November 2011 Janez Potočnik, European Commissioner for the Environment, expressed his determination to make 2013 the ‘Year of ...


    By Air Monitors Ltd.

  • Air quality in Europe - 2014 report

    Despite considerable improvements in the past decades, Europe is still far from achieving levels of air quality that do not pose unacceptable risks to humans and the environment. Air pollution is the top environmental risk factor of premature death in Europe; it increases the incidence of a wide range of diseases and has several environmental impacts, damaging vegetation and ecosystems. This ...

  • EPA Reviews National Ambient Air Quality Standards for Ozone, and Other Recent CAA Developments

    EPA Reviews National Ambient Air Quality Standards For Ozone: On December 17, 2014, the U.S. Environmental Protection Agency (EPA) issued a proposed rule revising the air quality criteria for ozone (O3) and related photochemical oxidants and National Ambient Air Quality Standards (NAAQS) for O3. 79 Fed. Reg. 75234. EPA proposed to revise the primary standard to a level within ...


    By Bergeson & Campbell, P.C.

  • Modelling the impact of sea-salt particles on the exceedances of daily PM10 air quality standards in the Netherlands

    Particles generated at the sea surface contribute to PM10 levels in coastal areas. Current estimates suggest annual average contributions of up to 10 µg/m³ along the North Sea coast in the Netherlands. In this paper the generation of size-segregated sea salt particles is described as a function of meteorological parameters. These particles are fed into a model ...


    By Inderscience Publishers

  • An ambient air quality monitoring network for Buenos Aires city

    This paper proposes an objective methodology for designing a multi-pollutant urban air-quality monitoring network to detect concentrations greater than reference concentration levels (CL). The network design includes both air quality simulation and an objective analysis based on monitoring tasks. The proposed methodology is applied to the city of Buenos Aires. Pollutants of concern are nitrogen ...


    By Inderscience Publishers

  • Air quality issues drive vehicle alternatives

    Vehicle exhaust systems remain a major source of air pollution in cities, despite the progress being made to reduce emissions from new models. Energy World takes a look at efficiency improvements, and the alternative fuel alternatives to petrol and diesel. In early April, the south of Britain woke to a hazy blanket of smog. A few weeks earlier, Paris had choked and spluttered through its own ...


    By Energy Institute (EI)

  • The Role of SIPs in Achieving Better Air Quality

    Untitled Document For more than 30 years, attaining the U.S. Environmental Protection ...

  • Air quality assessment in the EU: room for improvement?

    Different modelling approaches are used to design and assess air quality plans across Europe. This study assessed the strengths and weaknesses of these different approaches. The researchers conclude that a large variety of models is in use, without a preferred or standard model having emerged yet. They identify integrating local-scale and large-scale models and verifying models with measurements ...

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