The numbers are the various valves, feeding different areas of town.The saddest part is that town water is pumped from the Vaal river, using a canal and sump hole. From there it goes to sedimentation dams, etc.
The canal is mostly not maintained, so water feeds slowly into the sump hole, which gets overrun by sediment as well. The sedimentation dams stop during loadshedding, so after every loadshedding turn (We also have internal electricity load rotation during times of high demand) the sedimentation dams need to be backwashed, etc...
As
@Oldfut says, borehole. And , yes there are people selling water to refill JoJo tanks.
Civil societies/businesses installed a few JoJo tanks on the pavements at properties where people were willing to refill them at their own cost from their boreholes.
I switched my place over to borehole water (Even added an extra stop valve to the municipal supply - do not trust theirs) about 5 years ago.
I'm providing water to neighbours to one side as well. Neighbours on other side(s) have their own boreholes.