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WG C Groundwater Threshold Values First results of the EC information request Andreas Scheidleder

WG C Groundwater Threshold Values First results of the EC information request Andreas Scheidleder Prague – 28 April 2009 (amended on 30 April 2009). European Commission - DG Environment Unit D.2: Water and Marine. COMMENT.

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WG C Groundwater Threshold Values First results of the EC information request Andreas Scheidleder

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  1. WG C Groundwater Threshold Values First results of the EC information request Andreas Scheidleder Prague – 28 April 2009 (amended on 30 April 2009) European Commission - DG Environment Unit D.2: Water and Marine

  2. COMMENT • Thispresentation was amended after therecent WGC plenarymeeting (Prague, 28 April 2009) due to an important update ofdata. • Pleasebeawarethatthenumberof MS and GWBs whichareatriskoratpoorstatusare not complete, asanswerfornitrate was not explicitlyrequestedifthe Quality standardof 50 mg/l was applied in the MS.

  3. Groundwater TV request Aimofinvestigation • Enable COM toproduce a report on TVs by End 2009(GWD Art 3.7) Procedure • Drafttemplateforcomments (12.1.2009) • Final templatewithrequestforcompletion (13.2.2009) • Deadline 27.3.2009 Currentstate • 21.5 delivered / 2.5 later(LU, FI, 0.5 DK) / 3 norespond(GR, LV, MT)

  4. Groundwater TV request Methodology / Relationshipof TVs toenv. objectives • DW mostimportantTVs based on DW standards(TV=DWS, TV=75%DWS (2)) • In caseofdependentecosystems: Ecotoxstandards (EQS surfacewaters) • In caseofsalineintrusion: BL • Most stringent (EQS, DWS) was considered • But also mineralwaters, cleanupvalues,… • Attenuationanddilutionfactors • applied / not applied

  5. Groundwater TV request Background levelconsideration • Based on BRIDGE, based on national approaches • Percentileapproach (90, 95, 97.7) • No BL takenintoaccount(2)

  6. Groundwater TV request Relationship TVs and NBL • If BL < CV: • TV=BL, TV=LOQ (synthetic) • TV=(CV+BL)/2, • TV=CV • If BL > CV: • TV=BL, no ‚epsilon‘ • TV=1.2*BL (1)

  7. Groundwater TV request Contentofquestionnaire • Parameter (in additionto Annex II) • TV (value / range / no + reason) • Unit • Level ofestablishment (MS, RBD, GWB) • Codes of RBDs • Responsibleforrisk • # GWB atrisk • Responsibleforpoorstatus • # GWB poorstatus

  8. Groundwater TVs 191 substances • 10 from GWD Annex II • 6 Indicators (acid cap., hardness, pH, t, TOC, AOX) • 21 Metals (heavy) • 7 Nutrients (NO3, NO2, P (oPO4, PO4, P, molybdate reactive P), DOX • 10 others (B, Ca, Mg, Na, K, F, Bromate, Cyanide) • 80 Pesticides • 56 Synthetics 134 Responsible for risk 69 Responsible for poor status

  9. Groundwater TVs 191 Nominatedsubstances (>10 Member States)

  10. Groundwater TVs GWB atrisk– 134 substances, 22 MS (24 due to 3xBE)

  11. Groundwater TVs GWB poorstatus- 69 substances, 22 MS (24 due to 3xBE)

  12. Groundwater TVs 10 GWD Annex II substances – TVs needed

  13. Groundwater TVs 10 GWD Annex II substances – no TVs needed

  14. Groundwater TVs 21 Metals 10 furthermetalsnominatedonce

  15. Groundwater TVs 7 Nutrients

  16. Groundwater TVs 10 Other substances

  17. Groundwater TVs 80 Pesticides 11 pesticidesnominated 2 times, 57 pesticidesnominatedonce

  18. Groundwater TVs 56 Synthetics 18 syntheticsnominated 2 times, 31 syntheticsnominatedonce

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