Step-by-step risk management guidance for drinking-water supplies in small communities.
SODIS manual - updated version
The SODIS manual contains detailed information about technical and promotional aspects of the SODIS method.
Former version also available in French, Portuguese, Spanish, Uzbek, Russian
Chapter 5: A Community Guide to Environmental Health
Arsenic contaminated tube well water was first detected in Bangladesh in early 1990s. The arsenic comes from naturally arsenic-rich material delivered by the region's river systems, deposited over many years to make up the land of Bangladesh. Arsenic contamination is not caused by tube wells, or by ...irrigation or application of fertilizers.
Today, although 98 per cent of the population uses an improved drinking water source the safe water coverage of Bangladesh is 86 per cent because of arsenic contamination.
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Drinking-water quality regulations and standards developed or revised in accordance with this guidance will reflect the best practices identified in the WHO Guidelines for Drinking-water Quality to most effectively protect public health. Moreover, the regulations and standards will consider local ne...eds, priorities and capacities to ensure that they are realistic and appropriate. Topics covered include:
- Guiding principles
- Getting started
- Selecting parameters and parameter limits
- Setting out compliance monitoring requirements
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A field manual for Red Cross/Red Crescent personnel and volunteers
Long-term planning for an adequate and safe supply of drinking-water should be set in the context of growing external uncertainties arising from changes in the climate and environment. The water safety plan (WSP) process offers a systematic framework to manage these risks by considering the implica...tions of climate variability and change.
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This publication provides a practical tool to support countries in strengthening surveillance of WASH in schools. The findings will inform the development of supportive regulations and improvement planning to safeguard children’s health, well-being, dignity and cognitive performance. The tool also... enables countries to use the data collected to facilitate policy dialogue and inform international reporting, including on progress towards achieving the Sustainable Development Goal targets related to WASH in schools.
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Guidance has been updated on a number of chemicals: asbestos, bentazone, chromium, iodine, manganese, microcystins, nickel, silver, tetrachloroethene and trichloroethene. Guidance has also been added for chemicals not previously assessed in the Guidelines: anatoxin-a and analogues, cylindrospermopsi...ns and saxitoxins. The new guidance on organotins has replaced the prior guidance focused on dialkyltins. With these updates, the guideline values for tetrachloroethene and trichloroethene have been revised while new guideline values for cylindrospermopsins, manganese, microcystins, and saxitoxins have been established .
Updated information on cyanobacteria has been included, introducing an alert level framework for early-warning and to guide short-term management responses. Guidance has also been updated in the sections on adequacy of water supply, climate change, emergencies, food production and processing, and radiological aspects, particularly on managing radionuclides when exceeding WHO screening values and guidance levels.
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This technical brief presents the current options for safe storage and point of use water treatment. It is intended to help field staff working in a variety of locations to decide upon the most appropriate course of action for providing safe water for the communities in which they work. The effectiv...eness of household water treatment options now and in the future rely to a huge extent on user compliance; it is critical that users are involved in the decision making process, and are aware of the purpose, how to use, maintain and manage their household water options. The brief therefore details relevant hygiene promotion steps for the different treatment options.
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Content:
National Drinking Water Quality Standards (NDWQS)
Water Safety Plan
Water Quality Surveillance
Objective:
To promote public health, safety and welfare by ensuring quality standards of drinking water
CDI 2 WASH Program
The “Field Level Arsenic Testing Guideline” provides guidance for testing arsenic in groundwater in simple and cost-effective way. The guideline covers different aspects like costing involved in a testing program, justification of selecting field kits, sample collection p...rocedure, interferences, data management, quality control, safety, waste management issues along with the testing procedure. The guideline will be useful for all technicians, researchers and practitioners for practical purpose related to arsenic test for promoting safe water supply.
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This volume contains monographs prepared at the ninety-first meeting of the Joint FAO/WHO Expert Committee on Food Additives (JECFA), which met virtually online from 1 to 12 February 2021.
The detailed monographs in this volume summarize data on specific contaminants in food. Individual monographs ...present the assessment of exposure to cadmium from all food sources, the technical, analytical, dietary exposure and toxicological data on ergot alkaloids, an assessment of five substances that may occur as previous cargoes, and a revision of the specifications for steviol glycosides. This volume and others in the WHO Food Additives series contain information that is useful to those who produce and use food additives and veterinary drugs and those involved with controlling contaminants in food, government and food regulatory officers, industrial testing laboratories, toxicological laboratories and universities.
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Safe drinking-water management must consider drinking-water quality, acceptability and quantity in the context of public health protection. In this manual, the term “safety” encompasses these three elements. Although the principles in this manual can be broadly applied to all types of drinking-w...ater supplies, the guidance is primarily intended for piped water supplies that are professionally managed (by a water supplier or equivalent management entity).The guidance may be applied to existing drinking-water supplies, or adapted for water supplies that are in the planning stage before construction.
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Small drinking-water supplies commonly experience operational, managerial, technical and resourcing challenges that impact their ability to deliver safe and reliable services. The needs and opportunities associated with these supplies therefore warrant explicit consideration in policies and regulati...ons.
These Guidelines, specifically tailored to small water supplies, build on over 60 years of guidance by the World Health Organization (WHO) on drinking-water quality and safety. They focus on establishing drinking-water quality regulations and standards that are health based and context appropriate; on proactively managing risks through water safety planning and sanitary inspections; and on carrying out independent surveillance. The guidance is intended primarily for decision-makers at national and subnational levels with responsibility for developing regulatory frameworks and support programmes related to these activities. Other stakeholders involved in water service provision will also benefit from the guidance in this document.
Designed to be practical and accessible, these Guidelines offer clear guidance that is rooted in the principle of progressive improvement. State-of-the-art recommendations and implementation guidance are provided, drawn from a comprehensive evidence review and established good practices. Additionally, case examples are provided from countries and areas around the world to demonstrate how the guidance in this publication has been implemented in practice in a wide variety of contexts.
Together with WHO’s 2024 Sanitary inspection packages – a supporting tool for the Guidelines for drinking-water quality: small water supplies, these Guidelines update and supersede WHO’s 1997 Guidelines for drinking-water quality. Volume 3: surveillance and control of community supplies. Key changes to this updated publication include a greater focus on preventive risk management and a broader range of small water supplies covered, including those managed by households, communities and professional entities.
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