Page 69 - U4SSC KPIs Verification Manual - A guide for verifiers

Dimension Economy
Sub-Dimension Infrastructure

Category Water and Sanitation
KPI Name Water Supply Loss
KPI No. EC: I: WS: 3C Type: Core Type: Sustainable

Definition / Percentage of water loss in the water distribution system
Description

Rationale / Water loss from distribution systems is a problem in almost all conurbations
Interpretation / around the world but can be a serious issue in areas where water is scarce.
Benchmarking This problem deserves immediate attention and appropriate action to reduce
avoidable stress on scarce and valuable water resources.
Reducing water losses in urban drinking water supply networks could make a
substantial contribution to making progress in achieving SDG 6.
Water losses in urban networks not only lead to economic losses for the utilities,
but also reduce the number of people that have access to water. Where urban
water supplies are concerned, minimizing losses from the system to the lowest
technically feasible level is an urgent requirement.
Water supplied is the actual volume of water supplied by the utility to the
distribution system.
Utilized water is volume of water that is actually billed by the water supply utility.

The differences between the two values can be derived from multiple sources but
are generally due to leaks in the system and unauthorized use.
A declining trend and lower values are considered positive.

Source(s) NOTE 1 – Integrated Monitoring Guide for SDG 6 - UN Water 2016. Retrieved from
<http:// www .unwater .org/ publications/ integrated -monitoring -guide -sdg -6/ >
NOTE 2 – Progress on drinking water, sanitation and hygiene: 2017 update and
Sustainable Development Goal baselines. Retrieved from <http:// www .unwater
.org/ publication _categories/ whounicef -joint -monitoring -programme -for -water
-supply -sanitation -hygiene -jmp/ >
Methodology Calculate as:

Numerator: Volume of water supplied minus the volume of utilized water (l/year).
Denominator: Total volume of water supplied (l/year).
Multiply by 100.
Unit Percentage

Data Sources Data can be provided through the local water supply utility.
/ Relevant
Databases

U4SSC KPIs Verification Manual-A guide for verifiers 59