Best Practice Guides on Metals and Related Substances in Drinking Water – serie

This Best Practice Guide on the Control of Iron and Manganese in Water Supply is one of a series produced by the International Water Association’s Specialist Group on Metals and Related Substances in Drinking Water. Iron and manganese are often found in soft upland water sources associated with natural organic matter and are also commonly found in the groundwater abstracted from confined and unconfined aquifers. The presence of iron and manganese in water is one of the most frequent reasons for customers’ complaint due to aesthetic issues (yellow, brown and black or stains on laundry and plumbing fixtures). These two metals can be removed fairly readily by physico-chemical treatment. The municipal treatment systems deployed derive benefit from their larger scale, particularly in relation to control, but the processes used are less suitable for the numerous small supplies that are the most common water supplies throughout Europe, especially in rural areas. One important source of iron in drinking water is from old corroded cast-iron water mains, historically the material used most commonly in supply networks. Replacement and refurbishment is very expensive and the major challenge is how best to prioritize available expenditure. The purpose for this Best Practice Guide on the Control of Iron and Manganese in Water Supply is to give readers the broad view of a problem based on state-of-the-art compilation of the range of scientific, engineering, regulatory and operational issues concerned with the control of iron and manganese in drinking water. The Guide is of interest to water utility practitioners, health agencies and policy makers, as well as students on civil engineering and environmental engineering courses. Authors: Dr Adam Postawa, AGH University of Science and Technology, Faculty of Geology, Geophysics and Environment Protection, Krakow, Poland and Dr Colin R Hayes, University of Swansea, UK, Chair of IWA Specialist Group on Metals and Related Substances in Drinking Water.

In many respects, lead in drinking water has become a forgotten problem, since the mid 1980s when a range of environmental controls were implemented to reduce exposure to lead. This is largely because the sampling protocols, that underpin regulatory controls, are mostly inadequate and have tended to under-estimate the amount of lead that can be present in drinking water (IWA, 2010). Optimisation of Corrosion Control for Lead in Drinking Water Using Computational Modelling Techniques shows how compliance modelling has been used to very good effect in the optimisation of plumbosolvency control in the United Kingdom, particularly in the optimisation of orthophosphate dosing. Over 100 water supply systems have been modelled, involving 30% of the UK’s water companies. This “proof-of-concept” project has the overall objective of demonstrating that these modelling techniques could also be applicable to the circumstances of Canada and the United States, via three case studies. This report is the first in the Research Report Series published by the IWA Specialist Group on Metals and Related Substances in Drinking Water. Authors: Dr. C. R. Hayes and Dr. T. N. Croft Collaborators A. Campbell, City of Ottawa Water (CA) I. P. Douglas, City of Ottawa Water (CA) P. Gadoury, Providence Water (US) M. R. Schock, US Environmental Protection Agency (US)

Metals are inorganic substances that occur naturally in geological formations. Naturally occurring metals are dissolved in water when it comes into contact with rock or soil material. Some metals are essential for life and are naturally available in our food and water. Trace amounts of metals are common in water, and these are normally not harmful to your health. In fact, some metals are essential to sustain life. Calcium, magnesium, potassium, and sodium must be present for normal body functions. Cobalt, copper, iron, manganese, molybdenum, selenium, and zinc are needed. However many of the metals and metalloids that are found in drinking water can have an adverse impact on human health. This book provides a 'state-of-the-art' review of the health implications of metals and metalloids in drinking water and is a key reference in the risk assessment and management of water supplies. The increased urbanization and increased water demand in industrial areas has amplified the metals problem in groundwater sources. In fact the contamination of our water resources by poisonous metals occurs largely due to human activity. These activities include industrial processes, such as electronics industry and mining activity, agricultural activities, and the dumping of wastes in landfills. The International standard references concerning water resources are various and, though they are based on WHO guidelines, they are extremely diversified in relation to local issues and emerging problems. This report pulls the information together to provide an important reference source.

The management of small water supplies presents a unique challenge globally, in countries at all stages of development. A combination of lack of resources, limited understanding of the risks and poor expertise means that individuals and communities may face serious health risks from these supplies. This is not only due to microbiological contamination, but also from contamination by metals, either due to natural or man-made contamination of the source water or through leaching from plumbing materials due to inadequate conditioning and corrosion inhibition and use of inappropriate materials. This Best Practice Guide aims to share best practice and experience from around the world on a practical level. It looks at general issues relating to small supplies and ways of managing these, adopting a Water Safety Plan approach to deliver sound and lasting improvements to quality. Management techniques and treatment relating to specific metals will be covered, from a theoretical and practical perspective, to deliver a publication that will act as an authoritative guide for all those faced with the problem of ensuring the quality of a small water supply. Varied case-studies will help to illustrate issues and ways in which they have been resolved.  Table of contentsThe Difficulties of Managing Water Quality in Small WaterSupplies; What are Small Supplies?; The Management and Regulation of SmallWater Supplies; The Vulnerability of Small Water Supplies to Contamination byMetals; Water Safety Plans for Small Water Supplies; Making WSPs Work for SmallSupplies; Teamwork- The Value of a WSP Team;     APractical Guide to Developing a WSP for a Small Supply;   Practical Guidance for Risk Assessments; Establishing the MetalsProblem: Risk Assessment, Sampling and Analysis; The Range of PossibleProblems; Metal Solubility and Influencing Factors; Risk Assessment of SmallWater Supply Systems; Sampling and Analysis; Consumer Awareness; Sources ofMetals in Small Water Supplies; Origin of Contaminants; Contamination ofSurface Waters; Contamination of Ground Water; Contamination from TreatmentProcesses; Contamination in Distribution Pipework; Contamination from PlumbingFittings; Water Treatment Processes Available for Use on Small Water Systems;Process Selection; Types of Treatment; Practical Considerations of Treatmentfor Metals in Small Water Supplies; Iron; Manganese; Conditioning of Water toPrevent Dissolution of Plumbing Materials or Post-treatment Contamination; Treatmentis Only Part of the Story; Indications and Effects of Post-treatment Metal               Contamination in Small WaterSupplies; Establishing the Source of the Problem; Factors Controlling theCorrosion of Metals into Small Water Supplies; The Conditioning of Water toMinimise Corrosion; Manual of Individual Metals in Small Water Supplies, Aluminium,Antimony, Arsenic, Barium, Beryllium, Boron, Cadmium, Chromium, Cobalt, Copper,Iron, Lead, Manganese, Mercury, Nickel, Selenium, Tin, Tungsten, Uranium, Vanadium,Zinc; Case Studies; Arsenic removal in Small Supplies in Italy; A New BoreholeSupply with Iron Removal for a Single Property in England, UK; Metals in SmallWater Supplies in Areas of Water Scarcity in African Regions; Unexplained LeadContamination of a Small Water Supply in Northern ScotlandEDITORSMatt Bower, Drinking Water Quality Regulator for Scotland,UKColin Hayes, Swansea University, UK

Part of Metals and Related Substances in Drinking Water Set - buy all five books together to save over 30%! Visit: http://iwapublishing.comThe Best Practice Guide on the Control of Lead in Drinking Water brings together, for the first time, all of the regulatory, health, monitoring, risk assessment, operational and technological issues relevant to the control of lead in drinking water. Its focus is Europe and North America and the Guide benefits from the input of an international research network involving 28 countries. A large range of illustrative examples and case studies are provided. The Guide will be of interest to scientists, engineers, regulators and health specialists who are involved in the provision of safe drinking water. The reader will gain a comprehensive understanding of how to assess lead in drinking water problems, both in the water supply systems that serve a City, Town or rural area and at individual properties, dependent on their knowledge of pipe-work circumstances and water quality. Options for corrective action are outlined and their strengths and weaknesses explained, with information on costs and environmental impact. The reader should then be able to develop a strategy for controlling lead in drinking water in their area, establish an appropriate monitoring programme, select the right combination of corrective measures, and define the level of risk reduction that will likely be achieved. The Best Practice Guide provides a succinct compilation of the wide range of issues that relate to lead in drinking water, at a time when the regulations are under review in both Europe and North America. It will also be very relevant to all those implementing the Protocol on Water and Health, as lead in drinking water has recently been adopted as one of the key issues requiring assessment, improvement planning and reporting. The key features are: For the first time, all the complex inter-related aspects of lead in drinking water have been brought together.The detailed explanations given on sampling and monitoring should avoid mistakes being repeated.The information on optimising corrective treatment measures is the most comprehensive to date.The Best Practice Guide will facilitate the protection of water consumers from lead contamination and reduce associated health risks. This Guide is one of a series produced by the International Water Association’s Specialist Group on Metals and Related Substances in Drinking Water. It is a state-of-the-art compilation of the range of scientific, engineering, regulatory and operational issues concerned with the control of lead in drinking water. Download the free Guide for Small Community Water Suppliers and Local Health Officials on Lead in Drinking Water at: http://iwapublishing.com/books/9781843393801/guide-small-community-water-suppliers-and-local-health-officials-lead-drinkingVisit the IWA WaterWiki to read and share material related to this title:http://www.iwawaterwiki.org/xwiki/bin/view/Articles/LeadinDrinkingWater