Download or read book Development of a Protocol for Risk Assessment of Microorganisms in Separate Stormwater Systems written by A. W. Olivieri and published by IWA Publishing. This book was released on 2007-09-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research has shown that the concentrations of microbial indicator organisms (e.g., fecal coliforms) in stormwater may be quite high. However, studies have not clearly established relationships between the concentrations of indicator organisms and microbial pathogens in stormwater, or between stormwater indicator organism concentrations and illness. Thus, it is difficult to interpret indicator data collected by local public agencies in the context of potential risk to human health. The primary objective of this investigation was to generate guidance to enable more accurate and defensible evaluations of stormwater microorganism data and the associated risks to human health from exposure to microbial pathogens in stormwater. The investigation consisted of three major tasks: reviewing and summarizing relevant published literature, conducting a web-based data questionnaire and developing a science-directed data collection plan. Topics discussed include: 1) waterborne pathogens that pose the greatest risk to human health, 2) concentrations of pathogens and indicator organisms observed in stormwater, 3) defensible relations between indicator organisms and pathogens of public health concern in stormwater, 4) the environmental fate of pathogens and indicator organisms in stormwater, 5) the use of microbial source tracking (MST) techniques to identify sources of fecal contamination, and 6) the effectiveness of stormwater microorganism control technologies and associated costs. Additionally, recommended next steps needed to enable defensible evaluations of stormwater microorganism data and the associated risk to human health from exposure to stormwater are presented. Next steps include the development of interim guidance for management prioritization, pathogens enumeration method development, and pilot and nation-wide data collection programs.
Download or read book Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage Infrastructure to Improve Water Quality in Ultra urban Areas written by and published by Transportation Research Board. This book was released on 2012 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.
Download or read book Protocol for Developing Pathogen TMDLs written by and published by . This book was released on 2001 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Microbial Risk Assessment written by Charles N. Haas and published by John Wiley & Sons. This book was released on 2014-07-08 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the latest QMRA methodologies to determine infection risk cause by either accidental microbial infections or deliberate infections caused by terrorism • Reviews the latest methodologies to quantify at every step of the microbial exposure pathways, from the first release of a pathogen to the actual human infection • Provides techniques on how to gather information, on how each microorganism moves through the environment, how to determine their survival rates on various media, and how people are exposed to the microorganism • Explains how QMRA can be used as a tool to measure the impact of interventions and identify the best policies and practices to protect public health and safety • Includes new information on genetic methods • Techniques use to develop risk models for drinking water, groundwater, recreational water, food and pathogens in the indoor environment
Download or read book Evaluation of Microbial Risk Assessment Techniques and Applications written by J. A. Soller and published by IWA Publishing. This book was released on 2003-12-01 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation reviewed and evaluated methodologies used for microbial risk assessment with respect to their applicability for reclaimed water applications. The investigation was comprised of five primary components: a comprehensive database of articles, reports and books describing microbial risk assessment methodologies was established and reviewed. Risk assessment techniques and models were identified for estimating the public health risk from exposure to microorganisms via reclaimed water applications. Two models were identified for further evaluation: a static (individual based) and a dynamic (population based). In the third component, the two models were evaluated to differentiate between the conditions under which models predict similar and substantially different estimations of risk. Through numerical simulation, exposure/pathogen combinations were identified when it may be appropriate to use the less complex, static model. Case study risk assessment scenarios demonstrated the model selection process for three realistic, yet hypothetical reclaimed water scenarios.The fourth component presents a constraint analysis for existing reuse regulations. The constraint analysis is carried out by documenting the existing reuse regulations. The constraint analysis is carried out by documenting the existing regs in three states for landscape irrigation and uses that comparison as a starting point to identify how microbial risk assessment may be useful within the context of existing and potential future water reuse regulations. The investigation concludes by identifying criteria for a computer interface that would allow regulatory and/or municipal agencies/utilities to take advantage of the analysis discussed in the report. This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Download or read book Assessing Microbial Safety of Drinking Water Improving Approaches and Methods written by OECD and published by OECD Publishing. This book was released on 2003-03-20 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a state-of-the-art review on approaches and methods used in assessing the microbial safety of drinking-water.
Download or read book The Fecal Bacteria written by Michael J. Sadowsky and published by American Society for Microbiology Press. This book was released on 2010-11-19 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique, holistic approach to understanding fecal bacteria. • Offers a balanced, integrated discussion of fecal bacteria and their presence and ecology in the intestinal tract of mammals, in the environment, and in the food supply. • Covers the use of fecal bacteria to examine and assess water quality to offer protection from illnesses related to swimming in or ingesting contaminated water, in addition to discussing their use in engineering considerations of water quality, modeling, monitoring, and regulations. • Includes perspectives from an internationally recognized group of experts that integrates medicine, public health, environmental, and microbiological topics. • Serves as a resource for microbiologists, clinicians, animal scientists, engineers, environmental scientists, food safety experts, water quality managers, and students.
Download or read book Quantitative Microbial Risk Assessment for Sustainable Water Resources written by Kerry Ann Hamilton and published by . This book was released on 2016 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluates the microbiological health risks of using the sustainable water resources roof-harvested rainwater and reclaimed water. This research was accomplished by performing six tasks: 1) prioritizing pathogens for exploration; 2) conducting a screening study of opportunistic pathogens in rainwater tanks identified in task 1 in Brisbane, Australia; 3) conducting a longitudinal study of opportunistic pathogens for contaminated tanks identified in task 2; 4) developing a series of new dose response models necessary to conduct a risk assessment; 5) conducting a quantitative microbial risk assessment (QMRA) for two index opportunistic pathogens in roof-harvested rainwater; and 6) conducting a QMRA for an opportunistic pathogen in reclaimed water in partnership with a large field and laboratory study conducted by American Water. Decentralized, alternative, or otherwise “sustainable” water resources are growing in popularity as the world’s water resources are strained due to population growth, climate change, and water scarcity. These resources bring new challenges for the water industry in terms of maintaining water quality standards and minimizing adverse impacts. Increased attention has been devoted to opportunistic pathogens due to their growing importance as a portion of the waterborne disease burden in many countries and need to assess their associated health risks. The two systems investigated in this thesis are roof-harvested rainwater (RHRW) systems and reclaimed water. Roof-harvested rainwater systems are used in many parts of the world to collect rainwater that falls on roof surfaces in a tank or barrel. This rainwater is then used for a variety of potable or non-potable purposes. Reclaimed water is wastewater reused for beneficial purposes with treatment, where the level of treatment depends on the reuse application. Both types of water systems can foster environments that are conducive to the occurrence of opportunistic pathogens. Opportunistic pathogens are microorganisms that are pathogenic under certain sets of circumstances and typically affect children, the elderly, and immune-compromised hosts rather than healthy individuals. The two opportunistic pathogens that are the focus of this work are Legionella pneumophila and Mycobacterium avium complex (MAC). L. pneumophila causes infection and respiratory disease through inhalation of aqueous aerosols, while MAC can causes infection or disease through inhalation or ingestion. Due to the use of RHRW for both potable and non-potable purposes, and the use of reclaimed water for potable purposes that generate large-scale aerosols (such as cooling tower mists), the potential for public health risk exists as a result of human contact with these water sources. A QMRA is therefore needed to assess risk and prioritize risk management and data gathering needs for both of these pathogens under a variety of scenarios. This thesis presents a large-scale field study of RHRW in Brisbane, Australia, where RHRW is used on a large scale due to aggressive droughts in the region. Molecular biology methods (qPCR) and culture-based methods were used to screen tanks for opportunistic pathogens, and a subset of contaminated tanks was chosen for a six-month follow-up study. A survey of rainwater tank owner use and maintenance practice was conducted. Additionally, an analysis of the correlation among microorganisms and between microorganisms and meteorological factors was performed to inform risk management approaches. A major barrier to conducting a QMRA for MAC has been the development of a risk assessment framework and dose response models. These models have been developed for this work and as a result, a QMRA is performed for RHRW using Monte Carlo simulation and sensitivity analysis. A similar modeling approach is used for assessing risks from toilet flushing, spray irrigation, and cooling tower use for reclaimed water. As a result, appropriate uses for RHRW are designated and appropriate setback distances for cooling towers and spray irrigation systems are proposed for reclaimed water.
Download or read book Urban Stormwater Management in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-03-17 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.
Download or read book Wastewater Pathogens written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2004-10-28 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical guide to wastewater pathogens The fourth volume in Wiley's Wastewater Microbiology series, Wastewater Pathogens offers wastewater personnel a practical guide that is free of overly technical jargon. Designed especially for operators, the text provides straight facts on the biology of treatment as well as appropriate protective measures. Coverage includes: * An overview of relevant history, hazards, and organisms * Viruses, bacteria, and fungi * Protozoa and helminthes * Ectoparasites and rodents * Aerosols, foam, and sludge * Disease transmission and the body's defenses * Removal, inactivation, and destruction of pathogens * Hygiene measures, protective equipment, and immunizations
Download or read book Management of Legionella in Water Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-02-20 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Legionnaires' disease, a pneumonia caused by the Legionella bacterium, is the leading cause of reported waterborne disease outbreaks in the United States. Legionella occur naturally in water from many different environmental sources, but grow rapidly in the warm, stagnant conditions that can be found in engineered water systems such as cooling towers, building plumbing, and hot tubs. Humans are primarily exposed to Legionella through inhalation of contaminated aerosols into the respiratory system. Legionnaires' disease can be fatal, with between 3 and 33 percent of Legionella infections leading to death, and studies show the incidence of Legionnaires' disease in the United States increased five-fold from 2000 to 2017. Management of Legionella in Water Systems reviews the state of science on Legionella contamination of water systems, specifically the ecology and diagnosis. This report explores the process of transmission via water systems, quantification, prevention and control, and policy and training issues that affect the incidence of Legionnaires' disease. It also analyzes existing knowledge gaps and recommends research priorities moving forward.
Download or read book Cryptosporidium From Molecules to Disease written by R.C.A. Thompson and published by Elsevier. This book was released on 2003-12-17 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the relatively short period since Cryptosporidium was recognised as a human pathogen, and that it could be transmitted in water as well as directly between animals and people, it has been the subject of intense investigations. Its status as an opportunistic pathogen, especially in AIDS patients, and the lack of effective anti-cryptosporidial drugs have served to emphasise the public health importance of this organism. This has to some extent overshadowed the fact that Cryptosporidium is also an important pathogen of domestic animals and wildlife. In recent years, the application of molecular biology and culture techniques have had an enormous impact on our understanding of the aetiological agents of cryptosporidial infections and our ability to study the causative agents in the laboratory. As a consequence, a wealth of information and novel data has been produced during the last 3-4 years, particularly in the areas of taxonomy, biology, pathogenesis, epidemiology - particularly zoonotic and water borne transmission, and treatment.It is thus very timely to bring together in this book the international research community involved to review the major advances in research and identify the important research priorities for the future, thus enabling as wide an audience as possible to benefit from and share in this comprehensive look at Cryptosporidium and cryptosporidiosis.
Download or read book Onsite Wastewater Treatment Systems Manual written by and published by . This book was released on 2002 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
Download or read book Guidelines on recreational water quality Volume 1 written by World Health Organization and published by World Health Organization. This book was released on 2021-07-12 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of coastal, estuarine and freshwater recreational environments has significant benefits for health and well-being, including rest, relaxation, exercise, cultural and religious practices, and aesthetic pleasure, while also providing substantial local, regional and national economic benefits. These guidelines focus on water quality management for coastal and freshwater environments to protect public health. The guidelines: 1. describe the current state of knowledge about the possible adverse health impacts of various forms of water pollution; and2. set out recommendations for setting national health-based targets, conducting surveillance and risk assessments, putting in place systems to monitor and control risks, and providing timely advice to users on water safety.These guidelines are aimed at national and local authorities, and other entities with an obligation to exercise due diligence relating to the safety of recreational water sites. They may be implemented in conjunction with other measures for water safety (such as drowning prevention and sun exposure) and measures for environmental protection of recreational water use sites.
Download or read book Microbial Source Tracking written by Jorge W. Santo Domingo and published by Emerging Issues in Food Safety. This book was released on 2007 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a state-of-the-art review of the current technology and applications being utilized to identify sources of fecal contamination in waterways. - Serves as a useful reference for researchers in the food industry, especially scientists investigating etiological agents responsible for food contamination. - Provides background information on MST methods and the assumptions and limitations associated with their use. - Covers a broad range of topics related to MST, including environmental monitoring, public health and national security, population biology, and microbial ecology. - Offers valuable insights into future research directions and technology developments.
Download or read book Biosolids Applied to Land written by National Research Council and published by National Academies Press. This book was released on 2002-11-01 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1993 regulation (Part 503 Rule) governing the land application of biosolids was established to protect public health and the environment from reasonably anticipated adverse effects. Included in the regulation are chemical pollutant limits, operational standards designed to reduce pathogens and the attraction of disease vectors, and management practices. This report from the Board on Environmental Studies and Toxicology evaluates the technical methods and approaches used by EPA to establish those standards and practices, focusing specifically on human health protection. The report examines improvements in risk-assessment practices and advances in the scientific database since promulgation of the regulation, and makes recommendations for addressing public health concerns, uncertainties, and data gaps about the technical basis of the biosolids standards.
Download or read book Urban Water Reuse Handbook written by Saeid Eslamian and published by CRC Press. This book was released on 2016-01-05 with total page 1153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examining the current literature, research, and relevant case studies, presented by a team of international experts, the Urban Water Reuse Handbook discusses the pros and cons of water reuse and explores new and alternative methods for obtaining a sustainable water supply. The book defines water reuse guidelines, describes the historical and curren
