Kennet (Lambourn confluence to Enborne confluence) Water Body

Moderate ecological status

Viewing latest data (Updated on 20 May 2022). Switch to draft river basin management plan data

Attributes

  • Water Body IDGB106039017420
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSU5182565586
  • Surveillance Water BodyNo
  • Length16.626 km
  • Catchment area38.254 km2
  • Catchment area3825.366 ha

Classifications

Classification Item20132014201520162019
EcologicalModerateModerateModerateModerateModerate
Biological quality elementsHighModerateModerateModerateModerate
FishHighHighModerateModerateModerate
InvertebratesHighHighHighHigh
Macrophytes and Phytobenthos CombinedModerate
Physico-chemical quality elementsHighHighGoodGoodGood
Acid Neutralising CapacityHighHighHigh
Ammonia (Phys-Chem)HighHighHighHighHigh
Dissolved oxygenHighHighGoodGoodGood
PhosphateGoodHighHigh
TemperatureHighHighHighHighHigh
pHHighHighHighHighHigh
Hydromorphological Supporting ElementsSupports goodSupports goodSupports goodSupports goodSupports good
Hydrological RegimeSupports goodSupports goodSupports goodSupports goodSupports good
Specific pollutantsModerateModerateHighHighHigh
ChlorothalonilHigh
CopperModerateModerateHighHighHigh
IronHighHigh
ManganeseHighHigh
PendimethalinHigh
TriclosanHighHigh
ZincHighHighHighHighHigh
ChemicalFailFailGoodGoodFail
Priority hazardous substancesGoodGoodGoodGoodFail
Benzo(a)pyreneGood
Benzo(b)fluorantheneGood
Benzo(g-h-i)peryleneGood
Benzo(k)fluorantheneGood
Cadmium and Its CompoundsGoodGoodGoodGoodGood
Di(2-ethylhexyl)phthalate (Priority hazardous)GoodGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
HexachlorocyclohexaneGoodGood
Mercury and Its CompoundsGood
NonylphenolGoodGood
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
QuinoxyfenGood
Tributyltin CompoundsGoodGood
Priority substancesFailFailGoodGoodGood
AclonifenGood
AlachlorGood
BifenoxGood
CybutryneGood
Cypermethrin (Priority hazardous)Good
Dichlorvos (Priority)Good
FluorantheneGood
Lead and Its CompoundsFailFailGoodGoodGood
Nickel and Its CompoundsFailFailGoodGoodGood
PentachlorophenolGoodGood
TerbutrynGood
Other PollutantsDoes not require assessmentDoes not require assessmentDoes not require assessmentDoes not require assessmentDoes not require assessment

Investigations into classification status

No data to show

Reasons for not achieving good (RNAG) and reasons for deterioration (RFD)

All reasons (RFDs and RNAGs) attributed to the classification elements in this water body.

Reason TypeSWMIActivityCategoryClassification ElementMore information
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementFishDetails
RNAGMeasures delivered to address Reason, awaiting classificationNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGPhysical modificationInland boating and structuresNavigationFishDetails
RNAGInvasive non-native speciesNorth american signal crayfishNo sector responsibleFishDetails

Reasons for not achieving good status by business sector

The issues preventing waters reaching good status and the sectors identified as contributing to them. The numbers in the table are individual counts of the reasons for not achieving good status with a confidence status of 'confirmed' and 'probable', where the latest classification is less than good status. There may be more than one reason in a single water body. Note, table does not include reasons for deterioration.

Significant water management issuePhysical modificationsPollution from waste waterPollution from towns, cities and transportChanges to the natural flow and level of waterInvasive non-native speciesPollution from rural areasPollution from abandoned mines
Agriculture and rural land management0000010
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0000000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total0000010

Objectives

Classification ItemStatusYearReasons
EcologicalGood2027Disproportionately expensive: Disproportionate burdens
Biological quality elementsGood2027Disproportionately expensive: Disproportionate burdens
FishGood2027Disproportionately expensive: Disproportionate burdens
InvertebratesGood2015
Physico-chemical quality elementsGood2015
Acid Neutralising CapacityGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2015
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2015
CopperHigh2015
ZincHigh2015
ChemicalGood2015
Priority hazardous substancesGood2015
Cadmium and Its CompoundsGood2015
Priority substancesGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveTypeMore information
Berkshire DownsG87Nitrates Directive
River LambournUK0030257Habitats and Species DirectiveSACNatural England
Kennet & Lambourn FloodplainUK0030044Habitats and Species DirectiveSACNatural England