1. Background document: How to build the Inventory of Emissions, Discharges and Losses: main elements and compilation of existing datasets (2007)
DG on inventory guidance Meeting
Brussels, 26 May 2010
Madalina DAVID
WFD Team, DG Environment
Benoît FRIBOURG-BLANC,
Consultant, IOW

2. Inventory : what is it?
An information system with one or more databases that organises by source, the amount of substances through various pathways are discharged, emitted/released or lost into the aquatic environment, or transferred to other media.
Source : Annex 1A, EU Environment Directorate, 2005c

3. Inventory : the main components
Sources: may be classified in categories, and the WFD requires at least point and diffuse sources (Art. 10) and urban, industrial, agricultural and other installations and activities (Annex II 1.4.).
Pathways generally include all the routes the pollutants follow from the source to the receiving aquatic environment.
Substances: all priority substances and pollutants listed in Part A of Annex I of 2008/105/EC
Geographical scale:
point sources: each emitter
diffuse sources: sub-basin of RBD
Temporal scale: annual load

4. The Sources Diffuse sources S1 Atmospheric deposition
S2 Indirect drainage of deep groundwater reservoirs
S3 Agriculture
S4 Traffic and non urban infrastructure
S5 Accidental spills.
S6 Release from materials.
Point sources
S7 Roofs and paved areas
S8 Households
S9 Industry
S9.1 SME
S9.2 E-PRTR industry
S10 Waste deposit/landfill
S11 Historically contaminated land
S12 Natural sources
A link with NACE needed
Source : Data Collection Manual for the OECD/Eurostat Joint Questionnaire on Inland Waters, Tables 1 – 7, June 2004
Source : Adapted from Annex 1A, EU Environment Directorate, 2005c

5. The Pathways
for point sources: collection system (pipes, ditches, channels, tunnels, containers) + treatment system (treatment plant, sedimentation area…)
for diffuse sources: leakage, drift, spills, drainage…
Some examples of pathways:
Source : Adapted from Annex 1A, EU Environment Directorate, 2005c

6. The substances
Part A of Annex I of 2008/105/EC (individual substances or groups)
quantities with their associated units
international nomenclatures: EINECS/ELINCS and/or CAS …
This can be extended depending on additional needs identified

7. Inventory : existing data collections (as of 2007)

8. Building the Inventory Objective and basis
Objectives
Sources : all generating significant pollution quantities
Pathways: all through which significant quantities are discharged or lost
Substances: all significant loads for all relevant substances
Geographic: each RBD sub-unit
Temporal: year
Basis: WFD Art 5 and 8, E-PRTR (Regulation 166/2006)
Already existing datasets
Many guidances
Defined databases

9. Building the Inventory Method
Define technical organisation and data sources: E-PRTR, ETC-WTR 2002 and National inventories or permit registers
Adapt to national organisation: compare with reference lists
Select relevant datasets and define combination
Develop the information system and database

10. Inventory : pending questions
How to define non-significant loads? (90%? Less?)
How to consider off-site transfers (purification performance? GIS link)
How to include diffuse sources? (concept of net emission?)
How to assess/validate appropriate methods to close the gaps? (QA/QC on methods?)

11. Conclusion and way forward
A need to streamline approach with other developments under UWWTD, E-PRTR and/or EEA and ETC-WTR and Eurostat: make best use of current data collections,
Use the background document as a basis to develop a guidance with MS:
develop a work programme,
develop a table of content,
and identify good examples to illustrate.