Industrial & Domestic Water Treatment Solutions
World Water Day
International World Water Day is held annually on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources.
An international day to celebrate freshwater was recommended at the 1992 United Nations Conference on Environment and Development (UNCED). The United Nations General Assembly responded by designating 22 March 1993 as the first World Water Day.
Each year, World Water Day highlights a specific aspect of freshwater. On this page, we present a brief overview of the different themes that have been the focus of World Water Day celebrations.
Today, one in two people on the planet live in a city. The world’s cities are growing at an exceptional rate and urbanisation is a continuum. The main reason they are growing is because of natural increase in urban population, but also due to rural-to-urban migration and reclassification of rural areas to urban areas.
93% of the urbanization occurs in poor or developing countries, and nearly 40% of the world’s urban expansion is growing slums. Between 1990-2001 the world’s slums increased at a rate of 18 million people a year, and is projected to increase to 27 million new slum citizens per year between 2005-2020.
Investments in infrastructure have not kept up with the rate of urbanization, while water and waste services show significant underinvestment. The central problem is therefore the management of urban water and waste. Piped water coverage is declining in many settings, and the poor people get the worst services, yet paying the highest water prices.
Few urban authorities in developing countries have found a sustainable solution to urban sanitation, and utilities cannot afford to extend sewers to the slums, nor can they treat the volume of sewage already collected. Solid waste disposal is a growing threat to health and the environment.
Cities are complicated to manage: different approaches are needed for different types of urban environments. But cities also provide the best opportunity to improve livelihoods and infrastructure development, including water and waste services.
The big opportunity is increased recycling and reuse of water and wastes, an integrated urban management. Adopting more efficient water treatment technologies and capturing water and wastes within the city will also minimize environmental and downstream pollution.
50% of the world population live in cities of 10 million people or more. Africa and Asia have the highest rates of urbanization, further boosted by conflicts and disasters. Urbanization is not only centered in the rising megacities in the South, but also in the unstoppable growth in secondary cities and towns. In Latin America the majority of the population lives in smaller urban centers. Centers where we will see the biggest growth during the 20 coming years.
There is growing evidence that water resources will be significantly affected by climate change, both in quantity and quality, particularly through the impact of floods, droughts, or extreme events.
The effect of climate change will also mean more complex operations, disrupted services and increased cost for water and wastewater services. In addition, climate change and disasters will result in bigger migration to urban areas, increasing the demands on urban systems.
Water and Cities Facts and Figures
• Half of humanity now lives in cities and, within two decades, nearly 60% of the world’s population -5 billion people- will be urban dwellers.
• Urban growth is most rapid in the developing world, where cities gain an average of 5 million residents every month.
• The exploding urban population growth creates unprecedented challenges, among which provision for water and sanitation have been the most pressing and painfully felt when lacking.
• The relationship between water and cities is crucial. Cities require a very large input of freshwater and in turn have a huge impact on freshwater systems.
• Cities cannot be sustainable without ensuring reliable access to safe drinking water and adequate sanitation.
Coping with the growing needs of water and sanitation services within cities is one of the most pressing issues of this century. Sustainable, efficient and equitable urban water management has never been as important as in today’s world.
Water and Urban Growth by Numbers
Every second, the urban population grows by 2 people.
95% of the urban expansion in the next decades will take place in the developing world.
In Africa and Asia, the urban population is expected to double between 2000 and 2030.
Between 1998 and 2008, 1052 million urban dwellers gained access to improved drinking water and 813 million to improved sanitation. However, the urban population in that period grew by 1089 million people and thus undermined the progress.
One out of four city residents worldwide, 789 million in total, lives without access to improved sanitation facilities.
497 million people in cities rely on shared sanitation. In 1990, this number was 249 million.
27% of the urban dwellers in the developing world do not have access to piped water at home.
What are the Main Challenges?
Poverty
• 828 million people live in slums or informal settlements that are scattered around the world’s cities; the biggest challenge is to provide these people with adequate water and sanitation facilities.
• The urban poor pay up to 50 times more for a litre of water than their richer neighbours, since they often have to buy their water from private vendors.
Over-exploitation
• Due to rapid urbanization, cities face a growing demand for water and sanitation services. To meet this demand, cities are going deeper and further, which leads to over-exploitation of water resources.
Pollution
• Pollution typically refers to chemicals or other substances in concentrations greater than would occur under natural conditions.
• Every day, 2 million tons of human waste are disposed of in water courses.
• In many cities, especially in the developing world, the lack of convenient wastewater treatment and drainage facilities lead to pollution of the ground-and surface water resources.
Health
Lack of convenient sanitation and safe water supply in cities leads to serious health problems.
• Inadequate sanitation facilities often cause contamination of drinking water.
• After heavy rain, stormwater washes human waste, mainly from informal settlements lacking minimum facilities, into the open drinking water sources of the poor.
• Contaminated drinking water results in cholera epidemics, faecal-oral diseases such as diarrhoea, and outbreaks of malaria.
• While malaria was often considered a rural disease, it is now among the main causes of illness and death in many urban areas.
Leakage
• Leakage -loss- rates of 50% are not uncommon in urban distribution systems.
• Some 250 to 500 million m³ of drinking water gets lost in many mega cities each year.
• Saving this amount could provide an additional 10 to 20 million people with drinking water
in each mega city.
Water and Cities Around the World
Africa
• In Africa, 38% of the population is urban. This rate is expected to increase to 50% in 2050.
• In Sub-Saharan Africa, 44% of the urban dwellers uses improved sanitation and 35% has access to piped water in the household.
• In Ghana, 70% of the urban population shares sanitation facilities.
• 62% of the sub-Saharan Africa urban population lives in slums.
Asia
• Asia holds half of the world’s cities, including 6 of the world’s 10 largest cities.
• 43% of the urban population of south-central Asia lives in slums.
• The urban population in Asia will increase by 60% before 2025.
• Many Asian cities are ill-equipped to provide their growing populations the safe water and sanitation they need.
Latin America
• 77% of the Latin American population is urban and urbanization rates keep rising.
• In most Latin American countries, access to improved water and sanitation is quasi-universal.
Still, lack of improved drinking water and sanitation is a problem in Guatemala, Haiti, Nicaragua, and Bolivia, each of which has significant concentrations of slum households.
• Pollution of rivers and seas remains a big problem affecting coastal cities, where more than 60% of the Latin American population lives.
Areas of Concern
Mega cities
• Mega cities are cities with 10 or more million inhabitants. They host 9% of the world’s urban population.
• Nearly all mega cities around the world were facing increasing water scarcity in 2010.
Slums or informal settlements
• Today, 828 million people live in slum conditions, lacking basic services. This number grows by 6 million each year.
• Many slum dwellers die each year as a result of inadequate drinking water and sanitation services.
• Many slums are built in flood-prone areas and thus vulnerable.
Looking forward
Globally, 96% of the urban world today uses improved drinking water resources.
The 3rd United Nations World Water Development Report, published in 2009, indicates that the water problems of the world’s cities are manageable. Most of the required knowledge, experience and technology is already available. However, it is essential to put these problems high on national, regional, and international agendas.
New solutions for improving the sustainability of cities are being explored. Good urban water management is complex and requires not only water and wastewater infrastructure, but also pollution control and flood prevention. It requires coordination across many sectors and between different local authorities and changes in governance that lead to more sustainable and equitable use of the urban water resources.
Visit to World Water Day Official Website
2010-2011 World Disaster Reduction Campaign [ Play Video ]
The Challenge of Urban Response [ Play Video ]
MORE VIDEOS
References
• Asian Development Bank, 2004. Water and Poverty: Fighting Poverty through Water Management.
www.unchs.org/content.asp?typeid=19&catid=460&cid=2159
• United Nations, 2010. The Millennium Development Goals Report.
www.un.org/millenniumgoals/pdf/MDG%20Report%202010%20En%20r15%20-low%20res%2020100615%20-.pdf
• United Nations Human Settlements Programme (UN-HABITAT), 2010. State of the World’s Cities 2010/2011- Cities for All:
Bridging the Urban Divide. Press Kit. www.unhabitat.org/content.asp?cid=8051&catid=7&typeid=46&subMenuId=0
• United Nations Human Settlements Programme (UN-HABITAT), 2009. Global Report on Human Settlements 2009 Factsheet.
www.unhabitat.org/documents/GRHS09/FS2.pdf
• United Nations Human Settlements Programme (UN-HABITAT), 2006a. Water for Asian Cities Programme.
www.unhabitat.org/pmss/listItemDetails.aspx?publicationID=2052
• United Nations Human Settlements Programme (UN-HABITAT), 2006b. State of the World’s Cities 2006/2007.
www.unhabitat.org/pmss/listItemDetails.aspx?publicationID=2101
• UN-Water Decade Programme on Capacity Development (UNW-DPC), 2008. Proceedings of International Workshop on Drinking
Water Loss Reduction: Developing Capacity for Applying Solutions, UN Campus Bonn, 3-5 September 2008.
www.unwater.unu.edu/file/get/41
• World Health Organization (WHO), United Nations Children’s Fund (UNICEF) Joint Monitoring Programme (JMP). 2010. Progress
on sanitation and drinking water: 2010 update.
www.unwater.org/downloads/JMP_report_2010.pdf
• World Water Assessment Programme (WWAP), 2009. 3rd United Nations World Water Development Report: Water in a Changing
World. Chapter 2.
www.unesco.org/water/wwap/wwdr/wwdr3/pdf/12_WWDR3_ch_2.pdf
• World Water Assessment Programme (WWAP), United Nations Human Settlements Programme (UN-HABITAT), 2010. Water for
sustainable urban human settlements. Briefing note.
www.unwater.org/downloads/WWAP_Urban_Settlements_Web_version.pdf
• World Water Assessment Programme (WWAP), United Nations Human Settlements Programme (UN-HABITAT), 2006. 2nd United
Nations World Water Development Report: Water, a Shared Responsibility’. Chapter 3.
www.unesco.org/water/wwap/wwdr/wwdr2/table_contents.shtml
• World Water Assessment Programme (WWAP), United Nations Human Settlements Programme (UN-HABITAT), 2003. 1st United
Nations World Water Development Report: Water for People, Water for Life. Chapter 7.
www.unesco.org/water/wwap/wwdr/pdf/chap7.pdf
Websites
• Sustainable Water Management Improves Tomorrow’s Cities’ Health (SWITCH) website
www.switchurbanwater.eu/index.php
• United Nations Educational, Scientific and Cultural Organization (UNESCO). Website of the International Year of Freshwater 2003.
www.wateryear2003.org/
• United Nations Human Settlements Programme (UN-HABITAT). Water and Sanitation website.
www.unchs.org/content.asp?cid=2231&catid=270&typeid=24&subMenuId=0
• United Nations. Water for Life Decade website.
www.un.org/waterforlifedecade
• World Health Organization (WHO). Regional Office for Europe website, section on ‘Urban Health’
www.euro.who.int/en/what-we-do/health-topics/environmental-health/urban-health
• World Water Assessment Programme website, WWAP Challenges – Water and Cities.
www.unesco.org/water/wwap/targets/index.shtml#cities
UN-Water Decade Programme on Advocacy and Communication (UNW-DPAC)
