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2
Guidelines for drinking-water quality: Fourth edition incorporating the first and second addenda
recommended
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.
more
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 needs, 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 more
- Guiding principles
- Getting started
- Selecting parameters and parameter limits
- Setting out compliance monitoring requirements more
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 warr
...
ant explicit consideration in policies and regulations.
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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Disinfection of drinking-water supplies has been one of the most significant public health advancements of the last century with respect to reducing waterborne disease.
Although chlorine has been used as the disinfectant of choice for public ... drinking-water supplies for the past century, a number of emerging or alternative compounds are used or are being considered for the disinfection of drinking-water.
This series reviews the state of the knowledge on the application, efficacy and toxicity of bromine, iodine and silver as drinking-water disinfectants. more
Although chlorine has been used as the disinfectant of choice for public ... drinking-water supplies for the past century, a number of emerging or alternative compounds are used or are being considered for the disinfection of drinking-water.
This series reviews the state of the knowledge on the application, efficacy and toxicity of bromine, iodine and silver as drinking-water disinfectants. more
The Joint Monitoring Programme (JMP) report – Progress on household drinking water, sanitation and hygiene 2000 - 2020 – presents estimates on household access to safely managed drinking water,
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sanitation and hygiene services over the past five years, and assesses progress toward achieving the sixth sustainable development goal (SDG) to ‘Ensure availability and sustainable management of water and sanitation for all by 2030’.
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This guide is intended for people involved in the management and operation of small- to mediumsized organized water supply systems. The content has been developed with particular consideration for operational-level personnel with responsibility for chlorination (for example, water treatment plant op
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erators and technicians). The material presented within this guide may also be relevant for engineers and representatives from public health, local government, non-governmental organizations, as well as any other individuals supporting water safety planning activities for the supply of safe drinking-water.
Part 1. Chlorination principles: Describes key chlorination concepts, providing a knowledge foundation for the implementation of effective chlorination practices.
Part 2. Chlorination practices: Describes the practical application of the concepts presented in Part 1, including calculations and procedures for safe and effective chlorination of drinking-water supplies. more
Part 1. Chlorination principles: Describes key chlorination concepts, providing a knowledge foundation for the implementation of effective chlorination practices.
Part 2. Chlorination practices: Describes the practical application of the concepts presented in Part 1, including calculations and procedures for safe and effective chlorination of drinking-water supplies. more
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 th
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ree elements. Although the principles in this manual can be broadly applied to all types of drinking-water 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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A sanitary inspection is a simple, on-site evaluation (traditionally using a checklist) to help identify and support the management of priority risk factors that may lead to contamination of a drinking-water supply. Sanitary inspections are a well-e
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stablished and widely-applied practice. They can support water safety planning, and in some contexts, may be a simplified alternative to water safety plans.
This publication presents the World Health Organization’s (WHO’s) sanitary inspection packages. These packages update the sanitary inspection forms in WHO’s 1997 Guidelines for drinking-water quality. Volume 3: surveillance and control of community supplies. With more than 25 years of practical experience with the application of sanitary inspections, these packages have been developed from a comprehensive evidence review and established good practices.
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This field guide is a practical tool for improving and maintaining drinking-water safety. It is designed to be used by YOU as a rural community member who shares responsibility for operation and management of the
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drinking-water supply in your community. It can also be used by YOU as a staff member of the local health or water supply office, local government authority, nongovernmental organization (NGO) or other community-based organization that supports drinking-water safety in rural communities. Ensuring the safety of the community water supply is a daily job, and community members and other stakeholders have to work jointly to achieve this goal.
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Special Focus on COVID-19
The report provides updated estimates for drinking water, sanitation and hygiene in schools including progress from 2015 to 2019. It highlights the rapid improvement needed to ensure students have access to handwashing fac
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ilities with soap and water during the COVID-19 pandemic, and to meet associated SDG targets by 2030.
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The report summarizes the estimates of the burden of disease attributable to unsafe drinking water, sanitation, and hygiene for the year 2019 for four health outcomes - diarrhoea, acute respiratory infections, soil-transmitted helminthiases, and und
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ernutrition - which are included in the reporting of the Sustainable Development Goal indicator 3.9.2. The report includes estimates at global, regional and country level for 183 WHO Member States.
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A review of proactive risk assessment and risk management practices to ensure the safety of drinking-water
Based on information gathered from 118 countries representing every region of the globe, this report provides a picture of WSP uptake wor ... ldwide. It presents information on WSP implementation and the integration of WSPs into the policy environment. It also explores WSP benefits, challenges and future priorities. more
Based on information gathered from 118 countries representing every region of the globe, this report provides a picture of WSP uptake wor ... ldwide. It presents information on WSP implementation and the integration of WSPs into the policy environment. It also explores WSP benefits, challenges and future priorities. more
When setting national drinking-water quality regulations and standards, many countries consider the WHO Guidelines for drinking-water quality (GDWQ). To better understand the extent to which
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the GDWQ are used and reflected in these standards, this global review summarizes information from 104 countries and territories on values specified in national drinking-water quality standards for aesthetic, chemical, microbiological and radiological parameters.
The information provided will support regulatory agencies and other key stakeholders to access and compare data when setting or revising national drinking-water quality regulations and standards. more
The information provided will support regulatory agencies and other key stakeholders to access and compare data when setting or revising national drinking-water quality regulations and standards. more
The Guidelines for drinking-water quality: small water supplies have been developed to address the needs and opportunities associated with small supplies to facilitate progressive improvement towards safe and sustainable
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drinking-water services for all. These Guidelines are based on the principal recommendation in the World Health Organization’s Guidelines for drinking-water quality, and they provide guidance on applying that recommendation to small water supplies in particular. These Guidelines aim to help governments and practitioners improve the safety of drinking-water delivered through small supplies.
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Making the Case for Alcohol as a Public Health Threat in the Region. The purpose of this document is to explain the need for making alcohol a top public health priority in the region and the need for national and regional action. Current evidence-based research shows that alcohol consumption and
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drinking patterns in the Americas are at damaging levels, with the region surpassing global averages for many alcohol related problems.
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Step-by-step risk management guidance for drinking-water supplies in small communities.
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 more
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 more
The WHO/IWA document A practical guide to auditing water safety plans provides guidance on developing and implementing a WSP auditing scheme, covering such topics as the aim and role of auditing, auditor training and certification, audit criteria, audit timing and frequency and audit reportin
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g. The guidance document includes examples, tips, tools and case studies from more than a dozen low-, middle-, and high-income countries, and it serves as a practical resource for policy makers, government bodies responsible for drinking-water regulation or surveillance and water suppliers implementing WSPs.
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