The study of resilience in the face of large physical and climatic change has emerged as an important area of research.
Shortages of freshwater have become a serious issue in many regions around the world, partly due to rapid urbanisation and climate change.
Combined Sewer Overflow (CSO) infrastructure are conventionally designed based on historical climate data.

The sustainability of urban water systems is often compared in small numbers of cases selected as much for their familiarity as for their similarities and differences.

In the face of intensifying stresses such as climate change, rapid urban population growth, land use change, and public concern with rates and use restrictions, water management is becoming increasing
Ensuring future water security requires broad community support for changes in policy, practice, and technology, such as those involved in delivering alternative water schemes.
Access to water in Sub-Saharan Africa (SSA) continues to be a challenge to the extent that there are more people without access to water in 2015 than in 1990.
This chapter advances SDG 6 by explaining a multidisciplinary approach to drinking water from a public health perspective and how it is important as poverty, with its associated unsanitary living conditions and lack of access to water, proper nutrition, health care, and education, is the overwhelming determinant of infection and malnutrition.
This chapter advances SDG 6 by summarizing water contaminants (that have been included in current promulgated regulations) and emerging agents (that have been considered as contaminant candidates which may require further regulation), current regulations, and treatment options.
Training and capacity building are long established critical components of global water, sanitation, and hygiene (WaSH) policies, strategies, and programs.