I started as the main resident DJ at Cafe Mambo 18 years ago back in 1996 and it was set up very differently to how it is now. I used to play the whole night, every night, all summer. Sets ranged from 7 hours to up to nine hours long from before the sunset until the bar closed.
It turns out the Water Industry isn't really regulated in the public interest at all; but rather, for protecting a range of commercial vested interests. The concept of holistic catchment management, where capturing rainwater against dry spells should be common sense, is still not remotely the norm.