What are current solutions to Sick Water?

Question

In March the UN report "Sick Water" was published with a "Central Role of Wastewater Management in Sustainable Development".
What are current Wastewater Management solutions that could help diminish "sick water" on a global scale? and what are the most promising developments?

Hans Hummel · Accepted Answer

Accountability from Leadership/Government
There needs to be a fundamental realization from leadership (aka government) in the countries highly affected by "sick water" that they are accountable for the situation.  All the private organizations and NGOs put together will not be able to fix this problem.  In many nations this issue should be priority number one.  With more clean water you will have overall improvements in health, eduction, the economy, quality of life, security, and the list goes on.
There are a variety of technologies that are very effective and ready to go.  But who is going to make it happen?  Without the internal commitment from the leadership in each country it will be an uphill battle.

Taxonomy