ESRI web site includes a section named The Resource Center for Water Utilities Management:
The web site is for the ArcGIS water, wastewater, and stormwater utility community. It provides useful templates and best practice information enabling you to implement ArcGIS to manage your water utility information, perform your daily operations, and support your long term planning.
ArcGIS helps you maintain and manage up-to-date information about your water utility’s assets, including detailed descriptions about their current condition and operating status. You can also create performance information about your facilities such as customer complaints, main breaks, leaks, meter readings, and SCADA data.
Water utility asset management starts with compiling a geographic database of your utility network from source documents such as as-built drawings, construction plans, field observations, and GPS data collectors.
The Water Utilitiesֲ Blog has more useful information for the GIS user.