Water and wastewater service in Tokyo dates back to the 1890s, approximately 130 years ago. Facilities have been expanded continuously to keep up with the population’s desire for improved services...

The development and rapid industrialization of the Republic of Korea in the 1960s and 1970s saw people move to the Seoul Metropolitan Area (Seoul and satellite cities) seeking decent jobs and...

Greater Paris, considered as the continuous built-up area around the city, has 10.5 million inhabitants. It can be considered an old megacity that grew denser at its centre in the nineteenth...

New York City (NYC) has the largest unfiltered water supply in the United States. More than 9 million customers and visitors rely on three extensive reservoir systems, including 19 reservoirs and...

Mumbai is the largest city in India. A large part of this megacity was reclaimed from the sea when the seven original islands were joined together, with the result that most of the city is at sea...

The Mexico City Metropolitan Area (MCMA) occupies much of the Mexico Valley Basin. It is at once the capital of the country and its political, economic, religious and commercial hub. The basin,...

Manila is situated on the plain of the Pasig River that flows into Manila Bay. The city has a tropical climate with mean temperatures ranging from 20°C to 38°C. Metro Manila, comprising 17...

The City of Los Angeles (LA) has 4 million residents and forms the economic centre of the greater LA area, which is inhabited by 13 million people. The city is located along the Pacific Ocean in...

London is the largest urban area and capital city of the United Kingdom, with a population of 8.6 million and a forecast of 11 million by 2050. Its economy is based on service industries, while...

Lagos State, Nigeria’s largest city, is located in the south-western region of Nigeria, and encompasses an area of 3,577 km2. Lagos sits on a coastal plain characterized by flat terrain at an...

The city of Kinshasa, capital of the Democratic Republic of the Congo, is located on the left bank of the Congo River in front of the city of Brazzaville, capital of the Republic of Congo. Its...

Istanbul is the only city located on the continents of both Asia and Europe, and has served for centuries as the capital of three empires. Today, it is the commercial and financial centre of the...

Ho Chi Minh City (HCMC) covers 2,096 km2 and is home to almost 10 million inhabitants (8.1 million according to the 2014 census), and one of the most important megacities in South-East Asia. The...

The City of Chicago is the third-largest city in the United States and is home to 8.3 million people. It is situated 179 m above sea level in a metropolitan region that has a continental climate...

The Buenos Aires Metropolitan Area (AMBA) is home to 12.8 million inhabitants (2010) and covers 2,500 km2, stretching along the Rio de la Plata, an immense river with a flowrate of 23,000 m3/s....

Beijing is situated on the northern tip of the North China Plain and lies adjacent to Tianjin and Hebei Province. The city is located in a very flat part of the country surrounded by mountains to...