ambient ozone Articles

  • 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.

  • A Different Way of Looking at Ozone

    Ozone, a tri-oxygenated molecule, is known to act as a shield to protect us from the sun’s harmful rays.  As this innocent molecule plummets to the lower elevations on its journey to our hometowns, it meets hydrocarbon vapors and oxides of nitrogen (bad company), is exposed to sunlight and temperature (bad influence), and becomes a culprit and villain named photochemical smog or bad ozone. ...


  • Hotels Put Ozone to Work

    Growing operational costs and lower-than average occupancy rates spurred Apple Farm Inn and Suites, San Luis Obispo, Ca., to explore economic and facility-efficiency benefits obtained through the installation of an ozone laundry system. At the Apple Farm Inn laundry facility, an evaluation lasting several months was conducted in late 2006 into 2007, comparing the costs of laundering by ...

  • Sanitation Using Ozone & Chlorine

    For nearly 100 years, ozone has been used all over the world for water sanitation. It is nature’s strongest oxidizer and has a byproduct of pure oxygen. Chlorine, on the other hand, is a very effective, time-proven chemical, but is ineffective against hard-to-kill microorganisms such as cryptosporidium. It also has some unpleasant byproducts. Together, however, these two substances can ...

  • 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.

  • What is the size distribution and sources of particles in ambient air?

    The particle sizes in the ambient air are ranged from 1 nanometer to slightly more than 10 micrometers. There are three modes: coarse, fine and nano. The course mode particles are road dusts, spores and pollens. The minimum sizes of these particles are 1 to 3 micrometers. The fine mode particles are generally secondary particles formed from reactions such as smoke, sulfates, nitrates, ammonium ...

  • Why measuring the ambient NO2 without conversion?

    Nitrogen oxides NOx are pollutants that may have particular impact in terms of greenhouse gases, acidifying air etc ... issuance increased significantly since 1950 with the massive development of transport and industries. It therefore becomes necessary to provide measures always safer these pollutant gases, and to know the reliability of results. Currently, 60% of emissions of NO and NO2 are ...


    By Environnement S.A

  • An ozone climatology: relationship between meteorology and ozone in the Southeast USA

    A statistical analysis of ozone (O3) concentrations and meteorological parameters was performed to determine the relationship between meteorological changes and ambient O3 concentrations in the Southeast United States. The correlation between average daily maximum O3 concentration and various meteorological variables was analysed on a ...


    By Inderscience Publishers

  • Ozone Brings Better Bottled Water

    The proliferation of bottled beverages worldwide and an increased awareness of consumer health issues have beverage bottlers rethinking how to keep their liquids safe for consumption. One problem they face is the need to deliver a product that is free of bacteria, to provide extended shelf life and product quality. Ozone has quickly become the disinfectant of choice among water bottlers ...

  • The CaroMont Health Ozone Laundry System

    Abstract Ozone generating equipment was retrofit into the laundry washroom of the Gaston Memorial Hospital in Gastonia, NC, and began operating in the early part of July, 2010. Three ozone generating systems service six washer-extractors in the washroom. The performance of this fine-bubble ozone diffusion laundering system has been monitored since that time, with various adjustments made ...

  • Response of arbuscular mycorrhizal mungbean plants to ambient air pollution

    Abstract:The experiments were conducted in open top chamber system installed at the University of the Punjab, Quaid-e-Azam Campus, Lahore, Pakistan. The mungbean (Vigna radiata (L.) Wilczek var.M28) seeds were sown in earthen pots and were kept in filtered air, unfiltered air and ambient air. The ozone concentration was monitored daily during 1000hrs till 1600 h. The data for light intensity ...

  • An ambient indoor air environment is vital to ensure a safe and healthy workplace

    Indoor air quality (IAQ) relates to a number of environmental factors inside a building that can impinge on the health, comfort, or work performance of the building’s occupants. Monitoring IAQ is vital because it is estimated that the average person spends 90% of their time breathing “indoor air”. Poor IAQ is a contributing factor to both short and long-term health issues, these ...


    By PPM Technology

  • Legislation: The New Directive on Ambient Air Quality and Cleaner Air for Europe

    Keywords: Public health, pollution control, air quality framework measures, Directive 96/62, Sixth Environmental Action Programme, Clean Air for Europe Programme, Directive 2008/50, zones and agglomerations, limit values and target values, alert thresholds, critical level, information and reporting requirements, UK Air Quality Archive, ozone, action plans, enforcement ...


  • Air pollution by ozone in Europe in summer 2006

    This report provides an evaluation of ground-level ozone pollution in Europe for April-September 2006 based on information submitted to the European Commission under Directive 2002/3/EC on ozone in ambient air. Since the submitted data have not yet received their final validation by Member States, the conclusions drawn in this report should be considered as ...

  • Economic Evaluation of Air Quality Targets for Tropospheric Ozone

    The study identifies and estimates the (least) costs and benefits of meeting ambient air quality standards (different sets of limit/target values) for tropospheric ozone in the EU, taking into account deposition constraints for acidification. This report is divided into three parts: Part A describes the methodology of the analysis and reviews the databases used for the scenario calculations. ...

  • U.S. EPA Propses Revisions to Ozone NAAQS

    In May 2008, states, environmental groups, and industry groups filed petitions with the D.C. Circuit Court of Appeals (Court) for review of the 2008 ozone standards.  In March 2009, the Court granted a U.S. EPA request to stay the litigation so that the Obama administration could review the standards and determine whether they should be reconsidered. On September 16, 2009, U.S. EPA announced ...


    By All4 Inc.

  • Air pollution by ozone in Europe in summer 2005

    Ground-level ozone is one of the air pollutants of most concern in Europe. Ozone pollution is produced by photochemical processes involving nitrogen oxides and volatile organic compounds in the lower parts of the atmosphere. Ozone levels become particularly high in regions close to high ozone precursor emissions and during summer when stagnant meteorological conditions with high insolation and ...

  • Impacts of Ozone Nonattainment Designation and Strategies for Compliance

    In 1997, the U.S. Environmental Protection Agency (U.S. EPA) revised the National Ambient Air Quality Standards (NAAQS), to include an 8-hour ozone standard. The previous 1-hour ozone standard addressed the effects of exposure to short periods of high concentrations of ground-level ozone. The intent of the new standard is to address exposure to lower ozone levels over longer durations. With the ...


    By Trinity Consultants

  • Ozone in the Laundry Industry - Practical Experiences in the United Kingdom

    Abstract Since the early 1990s, the use of ozone in many commercial and industrial laundering applications has been evolving rapidly. Ozone allows washing to be conducted using cold water, thereby saving considerable heat energy and water consumption. Additionally, ozone enhances the wash process, resulting in a significant reduction in detergent dosage and number of rinses, thus saving ...

  • Weekday/Weekend Differences in Ambient Air Pollutant Concentrations in Atlanta and the Southeastern United States

    Abstract The authors quantified changes between mean weekday and weekend ambient concentrations of ozone (O3) precursors (volatile organic compounds [VOC], carbon monoxide [CO], nitric oxide, and oxides of nitrogen [NOx]) in Atlanta and surrounding areas to observe how weekend precursor emission levels influenced ambient O3 levels. The authors analyzed CO, nitric oxide (NO), and NOx ...

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