From 2016 so Dubai may have had a working sewage system for a year, so I could be wrong.
> Dubai: The emirate of Dubai will get a new deep tunnel sewerage system costing Dh12.5 billion in the next five years to replace more than 121 sewage pumping stations.
Pumping station meaning tankers transport the waste away.
https://dotless.ae/how-does-dubai-manage-its-sewage-water/
From 2016 so Dubai may have had a working sewage system for a year, so I could be wrong.
> Dubai: The emirate of Dubai will get a new deep tunnel sewerage system costing Dh12.5 billion in the next five years to replace more than 121 sewage pumping stations.
Pumping station meaning tankers transport the waste away.
https://gulfnews.com/uae/government/dubai-to-get-a-new-sewag...