Groundwater Directive

Last updated
Directive 2006/118/EC
European Union directive
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TitleGroundwater Directive
Made by European Parliament & Council
Journal referenceOJ L 372, 27.12.2006, p. 19–31 [1]
History
Date made12 December 2006
Entry into force17 January 2007 [1]
Implementation date16 January 2009
Other legislation
Amended byDirective 2014/80/EU
Current legislation

The Groundwater Directive (GWD; full title: Directive 2006/118/EC of the European Parliament and of the Council of 12 December 2006 on the protection of groundwater against pollution and deterioration) is an EU directive establishing specific measures as provided for in the Water Framework Directive in order to prevent and control groundwater pollution. [1]

Contents

In 2018, a total of 74% of EU groundwater bodies were assessed to be in "good chemical status". Agriculture has been identified as a major contributor to poor status due to nitrate and pesticide pollution. [2]

Background

The European Union first published legislation specifically for groundwater protection in 1979 (Directive 80/68/EEC) to limit the discharge of certain toxic substances from industrial sources. [3] [4]

Between 1991 and 1995, calls to implement measures avoiding long-term deterioration of freshwater sources by the year 2000 were recognised, as well as requests from the European Council to revise Directive 80/68/EEC due to concerns that groundwater resources remained seriously endangered by both pollutants and growing water extraction. [5] [6]

A 1995 report from the European Environment Agency for the Fifth Environmental Action Plan found that fresh water extraction rates had risen by 35% between 1970 and 1985. Groundwater beneath more than 85% of European agricultural lands (including central and eastern Europe) was also estimated to exceed guide levels of nitrate concentration. An estimated 65% of public water supply in the European Economic Area came from groundwater sources in the late 1980s. [7]

In 1996, an action programme was adopted by the European Commission, introducing controls on abstraction of freshwater, and identifying the need to monitor freshwater quality and quantities. [3] [6] The European Parliament and Council subsequently requested the Commission to establish a framework for European water policy, leading to the adoption of the Water Framework Directive (WFD) in October 2000. The WFD aims to ensure a balance between extraction and recharge of groundwater, but resolving quality standards for chemical status was a complex challenge, requiring the proposal and adoption of a "daughter" directive clarifying the criteria for chemical status measures and pollution trends, This new Groundwater Directive was adopted in December of 2006. [3]

Objectives

The GWD provides the detailed procedures for meeting the WFD's environmental objectives for groundwater quality. [8]

The specific measures include: criteria for the assessment of good groundwater chemical status; and criteria for the identification and reversal of upward trends in the concentration of pollutants. [9]

Member states are required to establish threshold values for all pollutants and pollution indicators. The directive specifies a minimum list of pollutants that must be considered to identify groundwater bodies that are at risk of not meeting good chemical standards as determined by the WFD. Both the list of pollutants and quality standards are to be reviewed every six years. [10]

Quality Standards

The Water Framework Directive outlines strategies to prevent and control pollution of groundwater. It mandates the adoption of measures with conductivity and pollutant concentration parameters to achieve good groundwater chemical status. In particular, groundwater bodies must not exhibit effects of saline or pose significant damage to ecosystems dependent on the body to be considered "good status". [11]

The Groundwater Directive addresses these quality standards with the following list of pollutants:

PollutantQuality Standards
Nitrates 50 mg/l
Active substances in pesticides, including their relevant metabolites, degradation and reaction products 0.1 μg/l

0.5 μg/l (total)

The quality standard specifies a total value for the sum of all individual pesticides detected and quantified in the monitoring procedures. [10]

Threshold Values

Member States are required to establish threshold values for all pollutants and indicators. The threshold values should be based on interactions between groundwater and dependent ecosystems; interference with legitimate uses of groundwater; pollutants that are characterised as risky; hydro-geological characteristics including information on natural background levels and water balance.

A minimum list of pollutants and indicators are specified for which Member States must consider establishing threshold values: [10]

DescriptionPollutants or indicators
Substances or ions or indicators which may occur naturally and/or as a result of human activities Arsenic, Cadmium, Lead, Mercury, Ammonium, Chloride, Sulphate, Nitrates a , Phosphorus (total)/Phosphates a
Man-made synthetic substances Trichloroethylene, Tetrachloroethylene
Parameters indicative of saline or other intrusions Conductivity

Member States are required to identify significant upward trends in groundwater bodies that are at risk in accordance with the WFD. The Groundwater Directive mandates the usage of statistical methods, such as regression analysis, for time series of individual monitoring points.

Measures to reverse upward trends are expected to be implemented once pollutant concentration reaches 75% of the values specified by the GWD's quality standards. [1]

Statistical methods employed by Member States have included ANOVA (sometimes combined with the LOESS method), the non-parametric Mann-Kendall test, Seasonal Kendall and Regional Kendall tests. [12]

Note

^a These pollutants were inserted in the Commission Directive 2014/80/EU of 20 June 2014

See also

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References

  1. 1 2 3 4 Directive 2006/118/EC of the European Parliament and of the Council of 12 December 2006 on the protection of groundwater against pollution and deterioration, 27 December 2006, retrieved 2024-12-15
  2. European Environment Agency. (2018). European Environment Agency, Zal, N., Whalley, C., Christiansen, T., Kristensen, P. et al., European waters – Assessment of status and pressures 2018, Publications Office, 2018. Publications Office. doi:10.2800/303664. ISBN   978-92-9213-947-6 . Retrieved 16 December 2024.{{cite book}}: |website= ignored (help)
  3. 1 2 3 "European Commission: Directorate-General for Environment, Groundwater protection in Europe – The new Groundwater Directive – Consolidating the EU regulatory framework". 2008. Retrieved 22 December 2024.
  4. "Council Directive 80/68/EEC of 17 December 1979 on the protection of groundwater against pollution caused by certain dangerous substances". 17 December 1979. Retrieved 22 December 2024.
  5. "Council Resolution of 20 February 1995 on groundwater protection". 28 February 1995. Retrieved 23 December 2024.
  6. 1 2 "Proposal for a European Parliament and Council Decision on an action programme for integrated groundwater protection and management" (PDF). 10 July 1996. Retrieved 23 December 2024.
  7. "Environment in the European Union - 1995 - Report for the Review of the Fifth Environmental Action Programme". State of the environment report 1/1995, European Environment Agency. 12 November 1995.
  8. European Commission: Energy, Climate change, Environment , retrieved 2024-12-15
  9. Frollini, E.; Preziosi, E.; Calace, N.; Guerra, M.; Guyennon, N.; Marcaccio, M.; Menichetti, S.; Romano, E.; Ghergo, S. (2021), "National Library of Medicine: Groundwater quality trend and trend reversal assessment in the European Water Framework Directive context: an example with nitrates in Italy", Environmental Science and Pollution Research International, 28 (17): 22092–22104, doi:10.1007/s11356-020-11998-0, PMC   8106612 , PMID   33411302
  10. 1 2 3 "Consolidated text: Directive 2006/118/EC of the European Parliament and of the Council of 12 December 2006 on the protection of groundwater against pollution and deterioration". 11 July 2014. Retrieved 15 December 2024.
  11. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy, 2014-11-20, retrieved 2024-12-16
  12. "Gourcy L., Lopez B. et al. (2019). Common implementation strategy for the Water Framework Directive and the Floods Directive. Technical report on groundwater quality trend and trend reversal assessment. Procedures applied by Member States for the first RBMP cycle, January 2019". January 2019. Retrieved 16 December 2024.