Page 98 - U4SSC KPIs Verification Manual - A guide for verifiers

Dimension Environment
Sub-Dimension Environment

Category Water and Sanitation
KPI Name Drinking Water Quality
KPI No. EN: EN: WS: 1C Type: Core Type: Sustainable

Definition / Percentage of households covered by an audited Water Safety Plan
Description

Rationale / Water safety and quality are fundamental to human development and well-
Interpretation / being. Providing access to safe water is one of the most effective instruments in
Benchmarking promoting health and reducing poverty.
WHO produces international norms on water quality and human health in the
form of guidelines that are used as the basis for regulation and standard setting
worldwide.
The Guidelines for Drinking Water Quality (GDWQ) promote the protection
of public health by advocating for the development of locally relevant
standards and regulations (health-based targets), adoption of preventive risk
management approaches covering catchment to consumer (Water Safety Plans)
and independent surveillance to ensure that Water Safety Plans are being
implemented and effective and that national standards are being met.
Cities should measure the quality of drinking water against the most recent WHO
Guidelines for Drinking Water Quality Fourth Edition.

An improving trend and higher values are considered positive.
Source(s) NOTE 1 – WHO – Guidelines for drinking water quality. Retrieved from <http://
apps .who .int/ iris/ bitstream/ 10665/ 254637/ 1/ 9789241549950 -eng .pdf ?ua = 1>

NOTE 2 – WHO. Water Sanitation. Retrieved from <http:// www .who .int/ water
_sanitation _health/ water -quality/ en/ >
NOTE 3 – Progress on drinking water, sanitation and hygiene: 2017 update and
Sustainable Development Goal baselines. Retrieved from
< https:// www .washdata .org/ >
Methodology Calculate as:

Numerator: Number of compliant samples to WHO Guidelines.
Denominator: Total number of samples.
Multiply by 100.

Unit Percentage
Data Sources NOTE – WHO Guidelines on drinking water quality. Retrieved from <http:// apps
/ Relevant .who .int/ iris/ bitstream/ 10665/ 254637/ 1/ 9789241549950 -eng .pdf ?ua = 1>
Databases
<http:// www .who .int/ water _sanitation _health/ water -quality/ en/ >

88 U4SSC KPIs Verification Manual-A guide for verifiers