How to NOT run out of water!

To establish a unlimited water supply you must do 2 things:

1. Place a Sewage Treatment Plant in your city
2. Build your Water Pumping Station right next to your Sewage Treatment Plant
1. Make sure you leave room to expand your Sewage Plant

Your Sewage Plant will treat the sewage and put clean water back into the water table at that location; so your Water pump will never run out.

What if you want to keep land value up?

This will cost a bit more but you will preform the same steps listed above except you will place this all in your Industrial zone. To make the water clean you will need to use Filtration pumps instead of Basic water pumps.