WGC-2 Status Compliance and Trends guidance document Johannes Grath Rob Ward Lisbon – 21 September 2007 European Commission - DG Environment Unit D.2: Water and Marine

Working Group C (2007-2009) Activity WGC-2 (Status compliance & trends) What happened so far Presentation of 1st drafts: 2 May 2007, Berlin Drafting Group Leader Meeting: 3 July 2007, Vienna Inclusion of comments received so far Elaboration of 2nd drafts Chemical status assessment – version 1.2 (draft text) Trend assessment – version 0.1 (list of content) Quantitative status assessment – version 1.2a (draft text) Internal circulation on 3 September 2007 Presentation of drafts in DG meeting 20 September 2007

Chemical Status assessment Content Introduction Background and requirements General principles / Pre-requisites Guidance for compliance testing 5 Tests Reporting Glossary References Annex: Methods for calculation Annex 2: Case Studies ???? No changes

Chemical Status assessment 2. Background and requirements 2.1.1 Definition of good chemical status WFD, Annex V 2.3.2 2.1.2 Criteria GWD, Article 3 (TV and GW-QS) 2.1.3 Procedure GWD, Article 4, Annex III 2.1.4 Classification elements and tests No changes

Chemical Status assessment 2. Background and requirements 2.2 Risk Assessment – Compliance Assessment New

Chemical Status assessment 2. Background and requirements 2.3 Threshold value – Criteria‘s values Link to TV guidance paper. Criteria‘s values = intermediate TV for each receptor TV = most stringent criterias value. Reported in RBMP 2.4 Schedule of compliance testing For GWBs at risk WHEN? Assumption: At the end of RBMP New

Chemical Status assessment 2. Background and requirements 2.5.1 Need for data aggregation at monitoring points RBMP-average = average of average over RBMP period Impairment of human use Significant env. risk from pollutants across GWB Saline and other intrusion Annual arithmetic mean – maximum values more relevant Diminution/damage of aquatic and terrestrial ecosystem No deterioration – DWPA Substantial Changes

Chemical Status assessment Elements of testing Trends

Chemical Status assessment 4. Guidance for compliance testing The assumption for this guidance is Each test has to be performed for GWBs and receptors at risk . Do not stop after the first ‚not of good status‘ result. Measures might be needed for several classification elements. Perform each test for each pollutant, group of pollutants (e.g. sum of pesticides) and indicator of pollution posing a risk separately. No summary assessment! For each receptor consider individual criteria values.

Whole GWB – Criteria’s value: 25 µg/l (e.g. legitimate uses) X – DW safeguard zone (DW standard of 10 µg/l): minimum treatment should apply = compliance to Art. 7(3) of WFD AQUATIC ECOSYSTEM GROUNDWATER BODY= DWPA DW safeguard zone Criteria value: 14 µg/l X X X X X X X X X TERRESTRIAL ECOSYSTEM X X X Criteria value: 8 µg/l X X X AQUATIC ECOSYSTEM Criteria value: 12 µg/l

Trend assessment

Trend assessment Trend assessment largely based on the technical report developed in 2002 (WG 2.8), will provide recommendations to Member States on how to undertake and interpret trend studies (including considerations on lag time of groundwater systems and how to integrate this in trend assessment);

Trend assessment (list of content) Working Group C (2007-2009) Activity WGC-2 (Status compliance & trends) Trend assessment (list of content) Legal background and requirements General principles Classification tests Trend assessment for individual monitoring points Statistical procedure! Different for springs and wells / pumped and not pumped Identification of upward trends at GWB scale Level of confidence and precision Baseline level Identification of upward trends which present significant risk of harm to ecosystems, human health or legitimate uses Where necessary… for assessing plumes do not expand Definition of starting point for trend reversal Reporting

Trend assessment element Trend tests

Trend (reversal) assessment Tests Tests + Flow charts (to be developed) No harm to legitimate uses No harm to aquatic ecosystems No harm to terrestrial ecosystems Plume assessment No saline intrusion No deterioration (DWPA) Part of status assessment

Trend (reversal) assessment Parameters Open issues Parameters significant and sustained upward trends to be identified in concentrations of pollutants, groups of pollutants or indicators of pollution found in groundwater bodies at risk all parameters?? - not explicit restriction but: Starting point is linked to GW-QS and TV  parameters causing risk – subject to trend assessment Recommendation: As trend assessment is part of the risk assessment  consider all parameters subject of pressures – which are present in significant amounts – see TV guidance 4.1.B

Status & trend (reversal) assessment Case studies - Once the guidance is widely accepted In accordance with the guidance – to illustrate the guidance To illustrate how status and trend assessment is being carried out in different Member States To cover ranges of hydrogeological and environmental settings Template for the case studies Limit case study to a maximum of 3 pages Inform DG leaders on part of guidance being covered

Working Group C (2007-2009) Activity WGC-2 (Status compliance & trends) 19 Oct 2007 - Comments from WG C-2 Drafting Group Members (chemical status and trends) Nov 2007 – Distribution of revised (status) and new (trend) draft to DG and WG C Jan 2008 - Comments from DG and WG C End March 2008 - Distribution of revised draft to DG and WG C 21 April 2008 – Ljubljana: WG C plenary meeting Tentative timetable