The UNSD/UNEP

1
The UNSD/UNEP OECD/Eurostat questionnaire

• Jeremy Webb, Ulrich Wieland
• Environment Statistics Section
• UN Statistics Division

2
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

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

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

5
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

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

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

8
Some compatibility problems

• UNSD GEMS-Water
• Individual measurements vs. annual aggregates
• GEMS-Water is much more detailed on water quality

9
Thank you for your attention