Environmental Performance Index 2008 [BETA]

Drinking Water Methodology

Indicator Code: WATSUP
Objective: Environmental Health
Policy Category:Environmental Health
Subcategory: Water (Effects on Humans)
Indicator Short Name: Drinking Water
Indicator Full Name: Percentage of Population with Access to Improved Drinking Water Source

Indicator Description: The WHO defines an improved drinking water source as piped water into dwelling, plot or yard; public tap/standpipe; tubewell/borehole; protected dug well; protected spring; and rainwater collection.

Units: Percentage
Country Coverage: 204
Reference Year: 2004
Target: 100%
Target Source: MDG 7, Target 10, Indicator 31
Short Source: WDI and MDG, 2007
Source: World Development indicators, http://devdata.worldbank.org/dataonline/old-default.htm

World Health Organization and United Nations Children’s Fund. Water Supply and Sanitation Collaborative Council. Global Water Supply and Sanitation Assessment, 2000 Report, Geneva and New York. Last updated data in November 2006, available at: http://www.childinfo.org/areas/water/countrydata.php

Other sources: Millenium Development Goals Indicators, http://millenniumindicators.un.org/unsd/mdg/Handlers/ExportHandler.ashx?Type=Excel&Series=667 Taiwan: Department of Environmental Monitoring and Information Management, EPA.
Source URL: http://devdata.worldbank.org/dataonline/old-default.htm http://www.childinfo.org/areas/water/countrydata.php

Methodology: The WHO defines an improved drinking water source as piped water into dwelling, plot or yard; public tap/standpipe; tubewell/borehole; protected dug well; protected spring; and rainwater collection (WHO 2007).

Values for Lybia, Oman and Saudi Arabia are 2000 values, and for New Zeeland are 1995 values. Belgium, Greece, Ireland, Italy, Portugal, Bahrain, Bermuda, Cayman Islands, Falkland Islands, Faeroe Islands, Hong Kong Special Administrative Region of China, Kuwait, Liechtenstein, Macao Special Administrative Region of China, San Marino and Holy See were also set to 100 on the basis that their per capita incomes exceeded US$15,971, which is the empirical threshold beyond which all countries have 100% coverage. Lithuania, Macedonia and Poland were imputed based on the regression model predicting ACSAT using log of per-capita income.

Additional Citations: WHO (World Health Organization). 2007, Country Profiles of Environmental Burden of Disease, Available online at http://www.who.int/quantifying_ehimpacts/countryprofiles/en/index.html

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