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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
The World Cities Report 2020 shows that the intrinsic value of sustainable urbanization can and should be harnessed for the wellbeing of all. The Report provides evidence and policy analysis of the value of urbanization from an economic, social and environmental perspective, including the unquantifi
...
able value that gives cities their unique character; and also explores the role of innovation and technology, local governments, targeted investments and the effective implementation of the New Urban Agenda in fostering the value of sustainable urbanization.
Please download the whole report in different languages here: https://reliefweb.int/report/world/world-cities-report-2020-value-sustainable-urbanization
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 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 more
- Guiding principles
- Getting started
- Selecting parameters and parameter limits
- Setting out compliance monitoring requirements more
In 2018, the Intergovernmental Panel on Climate Change announced that to restrict global temperature rise to 1·5°C, greenhouse gas emissions must decrease 45% by 2030 compared with 2010, and reach net zero by 2050.1
