{
  "url": "https://openlegislation.uk/eu-directive-2000-60/annex-V/division-1/division-1.2/division-1.2.2",
  "json_url": "https://openlegislation.uk/eu-directive-2000-60/annex-V/division-1/division-1.2/division-1.2.2.json",
  "legislation": "eudr/2000/60",
  "legislation_title": "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",
  "legislation_url": "https://openlegislation.uk/eu-directive-2000-60",
  "path": "annex/V/division/1/division/1.2/division/1.2.2",
  "kind": "division",
  "number": "1.2.2",
  "heading": "Definitions for high, good and moderate ecological status in lakes",
  "text": "Biological quality elements\nElement\nHigh status\nGood status\nModerate status\nPhytoplankton\nThe taxonomic composition and abundance of phytoplankton correspond totally or nearly totally to undisturbed conditions.\nThe average phytoplankton biomass is consistent with the type-specific physico-chemical conditions and is not such as to significantly alter the type-specific transparency conditions.\nPlanktonic blooms occur at a frequency and intensity which is consistent with the type specific physico-chemical conditions.\nThere are slight changes in the composition and abundance of planktonic taxa compared to the type-specific communities. Such changes do not indicate any accelerated growth of algae resulting in undesirable disturbance to the balance of organisms present in the water body or to the physico-chemical quality of the water or sediment.\nA slight increase in the frequency and intensity of the type specific planktonic blooms may occur.\nThe composition and abundance of planktonic taxa differ moderately from the type-specific communities.\nBiomass is moderately disturbed and may be such as to produce a significant undesirable disturbance in the condition of other biological quality elements and the physico-chemical quality of the water or sediment.\nA moderate increase in the frequency and intensity of planktonic blooms may occur. Persistent blooms may occur during summer months.\nMacrophytes and phytobenthos\nThe taxonomic composition corresponds totally or nearly totally to undisturbed conditions.\nThere are no detectable changes in the average macrophytic and the average phytobenthic abundance.\nThere are slight changes in the composition and abundance of macrophytic and phytobenthic taxa compared to the type-specific communities. Such changes do not indicate any accelerated growth of phytobenthos or higher forms of plant life resulting in undesirable disturbance to the balance of organisms present in the water body or to the physico-chemical quality of the water.\nThe phytobenthic community is not adversely affected by bacterial tufts and coats present due to anthropogenic activity.\nThe composition of macrophytic and phytobenthic taxa differ moderately from the type-specific communities and are significantly more distorted than those observed at good quality.\nModerate changes in the average macrophytic and the average phytobenthic abundance are evident.\nThe phytobenthic community may be interfered with, and, in some areas, displaced by bacterial tufts and coats present as a result of anthropogenic activities.\nBenthic invertebrate fauna\nThe taxonomic composition and abundance correspond totally or nearly totally to the undisturbed conditions.\nThe ratio of disturbance sensitive taxa to insensitive taxa shows no signs of alteration from undisturbed levels.\nThe level of diversity of invertebrate taxa shows no sign of alteration from undisturbed levels.\nThere are slight changes in the composition and abundance of invertebrate taxa compared to the type-specific communities.\nThe ratio of disturbance sensitive taxa to insensitive taxa shows slight signs of alteration from type-specific levels.\nThe level of diversity of invertebrate taxa shows slight signs of alteration from type-specific levels.\nThe composition and abundance of invertebrate taxa differ moderately from the type-specific conditions.\nMajor taxonomic groups of the type-specific community are absent.\nThe ratio of disturbance sensitive to insensitive taxa, and the level of diversity, are substantially lower than the type-specific level and significantly lower than for good status.\nFish fauna\nSpecies composition and abundance correspond totally or nearly totally to undisturbed conditions.\nAll the type-specific sensitive species are present.\nThe age structures of the fish communities show little sign of anthropogenic disturbance and are not indicative of a failure in the reproduction or development of a particular species.\nThere are slight changes in species composition and abundance from the type-specific communities attributable to anthropogenic impacts on physico-chemical or hydromorphological quality elements.\nThe age structures of the fish communities show signs of disturbance attributable to anthropogenic impacts on physico-chemical or hydromorphological quality elements, and, in a few instances, are indicative of a failure in the reproduction or development of a particular species, to the extent that some age classes may be missing.\nThe composition and abundance of fish species differ moderately from the type-specific communities attributable to anthropogenic impacts on physico-chemical or hydromorphological quality elements.\nThe age structure of the fish communities shows major signs of disturbance, attributable to anthropogenic impacts on physico-chemical or hydromorphological quality elements, to the extent that a moderate proportion of the type specific species are absent or of very low abundance.\nHydromorphological quality elements\nElement\nHigh status\nGood status\nModerate status\nHydrological regime\nThe quantity and dynamics of flow, level, residence time, and the resultant connection to groundwaters, reflect totally or nearly totally undisturbed conditions.\nConditions consistent with the achievement of the values specified above for the biological quality elements.\nConditions consistent with the achievement of the values specified above for the biological quality elements.\nMorphological conditions\nLake depth variation, quantity and structure of the substrate, and both the structure and condition of the lake shore zone correspond totally or nearly totally to undisturbed conditions.\nConditions consistent with the achievement of the values specified above for the biological quality elements.\nConditions consistent with the achievement of the values specified above for the biological quality elements.\nPhysico-chemical quality elements\nThe following abbreviations are used: bgl = background level, EQS = environmental quality standard.\nApplication of the standards derived under this protocol shall not require reduction of pollutant concentrations below background levels: (EQS >bgl).\nElement\nHigh status\nGood status\nModerate status\nGeneral conditions\nThe values of physico-chemical elements correspond totally or nearly totally to undisturbed conditions.\nNutrient concentrations remain within the range normally associated with undisturbed conditions.\nLevels of salinity, pH, oxygen balance, acid neutralising capacity, transparency and temperature do not show signs of anthropogenic disturbance and remain within the range normally associated with undisturbed conditions.\nTemperature, oxygen balance, pH, acid neutralising capacity, transparency and salinity do not reach levels outside the range established so as to ensure the functioning of the ecosystem and the achievement of the values specified above for the biological quality elements.\nNutrient concentrations do not exceed the levels established so as to ensure the functioning of the ecosystem and the achievement of the values specified above for the biological quality elements.\nConditions consistent with the achievement of the values specified above for the biological quality elements.\nSpecific synthetic pollutants\nConcentrations close to zero and at least below the limits of detection of the most advanced analytical techniques in general use.\nConcentrations not in excess of the standards set in accordance with the procedure detailed in section 1.2.6 without prejudice to Directive 91/414/EC and Directive 98/8/EC. (< EQS)\nConditions consistent with the achievement of the values specified above for the biological quality elements.\nSpecific non-synthetic pollutants\nConcentrations remain within the range normally associated with undisturbed conditions (background levels = bgl).\nConcentrations not in excess of the standards set in accordance with the procedure detailed in section 1.2.6 without prejudice to Directive 91/414/EC and Directive 98/8/EC. (< EQS)\nConditions consistent with the achievement of the values specified above for the biological quality elements.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "The following abbreviations are used: bgl = background level, EQS = environmental quality standard."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "Application of the standards derived under this protocol shall not require reduction of pollutant concentrations below background levels: (EQS >bgl)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudr/2000/60/annex/V/division/1/division/1.2/division/1.2.2",
    "retrieved_at": "2026-11-01T15:23:01.769169+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}