Networks of pipes need to be continuous in order to function. They cost ₡20 per cell to build and ₡0.08/week to maintain. Water Pipes are constructable from the start of the game, and are built underground in linear stretches. Water pipes must be continuous and connect directly to the supply and drainage buildings, but otherwise buildings only need to be within an 11-cell radius of functioning pipes in order to be supplied. Once a water supply building is erected, water pipes must be placed to transport water to your city and back to the sewage outlets. These water producers must be connected to your city by water pipes. Water towers may be built anywhere on land, but you must ensure there is no ground pollution near the water tower or your water supply will be contaminated and citizens will become sick. You want to place your pumping station upstream of any sewage drains so that it will not be contaminated by water pollution.

It is a a good idea to take note of the water's direction of travel. Water pumping stations must be built next to a water source, such as a river. Build these facilities to provide fresh water to your city. There are two types of water supply buildings: water towers and water pumping stations. Unlike most other service buildings, water buildings do not employ any citizens. Buildings will only tolerate an inadequate water and/or sewage supply for a short time before becoming abandoned. If the water or sewage service is insufficient for demand, buildings furthest in the network from the supply will be the first to lose service. However this is rarely an optimal strategy on the majority of maps. It is possible to have multiple, unconnected water networks, each with their own pumps and outlets. This info view will also colour-code buildings by whether they have adequate water supply or not, highlighting gaps in the city's network.

The water network and the area covered by the piping (shaded in light blue) can be seen in the water info view. Your citizens and the city services need fresh water and a way to get rid of sewage to stay healthy and function properly. Water Pumping Stations are highlighted blue (at left edge), sewage treatment plants are highlighted in green, and the area of effect of the pipes is shown in light blue.

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