Swift Unaccounted for Water

Before the unaccounted for water in a system can be determined two things must be known: The amount of water being supplied to the system and the amount of water that is actually being consumed by the users within the system.

Determining the supply of water to a system is standard practice and bulk water meters record the supply of water to different areas within the distribution system. The bulk meter readings are included in the Swift databases. These meter readings are grouped so that the total supply of water to discrete bulk meter zones can be calculated by adding the individual meter readings.

The data in Swift includes individual water meter readings for each of the consumers in the system. Swift calculates the total water sold to each user. Each user is linked in turn to any number of bulk meter zones through a cross-reference table so that the total water sold within each bulk meter zone can be calculated. Comparing these totals to the total bulk meter input gives the unaccounted for water for the zone.