Improving sanitation services through larger and centralised wastewater infrastructure often seems to be the only option for a city to reach citywide coverage. This can be a long and overwhelming task for many fast-growing cities worldwide where on-site sanitation systems are still the prevailing solution. How do we then define where to put what type of sanitation systems?
Wherever we work, we often faced this question. While there is no simple answer to this question, we recently put together our experiences from multiple projects to explain the cluster approach which could be a way for sanitation infrastructure planning. This was published in the June 2022 issue of the Trialog Journal - the special issue on Decentralized water management in rapidly growing cities.
If you are also intrigued by this question, here is the article, go ahead and have a read. We would be keen to know your thoughts on the methods used.