1. The UNSD/UNEP & OECD/Eurostat questionnaire
Jeremy Webb, Ulrich Wieland
Environment Statistics Section
UN Statistics Division

2. Vienna Work Session on Water Statistics
Main questionnaires
UNSD Questionnaire on Environment Statistics, water section
OECD/Eurostat Questionnaire on the State of the Environment, section on Inland Water
FAO water questionnaire
GEMS-Water questionnaire
20/06/2005
Vienna Work Session on Water Statistics

3. UNSD Questionnaire on Environment Statistics, water section
Data collected every 2 years from 153 countries (excl. OECD and Eurostat countries)
First version 1999, next sending March 2006
Results published on UNSD Web-site
Covers water resources, abstraction, use, treatment, quality, and population served
20/06/2005
Vienna Work Session on Water Statistics

4. UNSD Questionnaire on Environment Statistics, water section
Table W1: Renewable Fresh Water Resources
Table W2: Water Abstraction by Source
Table W3: Water Use by Supply Category and Activities
Table W4A: Waste Water Generation
Table W4B: Waste Water Treatment
Table W4C: Waste Water Treatment Facilities
Table W5: Selected Variable at the City Level
Table W6-8: Water quality
20/06/2005
Vienna Work Session on Water Statistics

5. Vienna Work Session on Water Statistics
OECD/Eurostat Questionnaire on the State of the Environment, section on Inland Water
Data collected every 2 years from 40 mainly developed countries
First version 1980, next sending March 2006
Results published on OECD and Eurostat Web-site, and through the OECD compendium
Covers water resources, abstraction, use, emissions, treatment, quality, and population served
20/06/2005
Vienna Work Session on Water Statistics

6. Some compatibility problems
UNSD – OECD/Eurostat
Categories of WWTP: mechanical/biological/advanced against primary/secondary/tertiary
Waste water treatment by volume or BOD
Discharges in water
20/06/2005
Vienna Work Session on Water Statistics

7. Some compatibility problems
UNSD - FAO
Exploitable vs. renewable water resources
Calculation of renewable water resources
Separation of surface/ground water produced
Use of ISIC for abstraction / withdrawal
20/06/2005
Vienna Work Session on Water Statistics

8. Some compatibility problems
UNSD – GEMS-Water
Individual measurements vs. annual aggregates
GEMS-Water is much more detailed on water quality
20/06/2005
Vienna Work Session on Water Statistics

9. Thank you for your attention
20/06/2005
Vienna Work Session on Water Statistics