Where to get further information: Call up sewage treatment plants (if they exist) for further information. Also the city planning authority should know more about this. Individual stakeholders (such as large industries) should also be able to answer your questions. For an in depth analysis, laboratory analyses of effluents may be required.
Interlinkages: Wastewater treatment directly influences the quality of water that can be used for other purposes: If wastewater is discharged without treatment, it negatively influences both the quality of the water for those living further downstream, and hence their purification methods, limits the purposes that water can be used for, but also the availability of nutrients in agriculture. Which other interlinkages exist in your area?
In Unsustainaville, there is a central wastewater treatment facility that was built 10 years ago.
At a closer look, there are the following problems with wastewater treatment: