system
Given the following post, respond as if you're commenting on Reddit:
human
[Dredd] Water?? Where does Mega-City One get enough water for so many people?

Can someone explain how Mega-City One manages, distributes, and obtains the water necessary to sustain so many people living in such a high density?

The amount of water and the sheer infrastructure needed seems mind boggling.
gpt
The technology available in Mega-City One is actually pretty impressive. That a lot of people seem to live in poverty and that crime runs rampant is due more to a lack of resources and massive overpopulation, but that doesn't mean that they're not still using some pretty impressive technology to even keep things at the level that they're at. 

There's plenty of water on the planet - If you have sufficient technology to desalinate and filter sea-water, you'd never really approach a problem of lack of supply. 

Given that most people in Mega-City One are unemployed due to advanced automation, it seems likely that desalination wouldn't be a problem for them.