Cavenham Stream Water Body

Good ecological status

Attributes

  • Water Body IDGB105033043000
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRTL7922664736
  • Catchment area43.142 km2
  • Surveillance Water BodyNo
  • Length19.415 km
  • Catchment area4314.23 ha

Classifications

Classification Item20192022
EcologicalGoodGood
Biological quality elementsGoodGood
FishGoodGood
InvertebratesGoodGood
Macrophytes and Phytobenthos CombinedHighHigh
Phytobenthos Sub ElementHighHigh
Physico-chemical quality elementsHighHigh
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenHighHigh
PhosphateHighHigh
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeDoes not support goodDoes not support good
MorphologySupports goodSupports good
Specific pollutantsHighHigh
CopperHighHigh
IronHighHigh
ManganeseHighHigh
ZincHighHigh
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
Benzo(a)pyreneGood
Benzo(b)fluorantheneGood
Benzo(g-h-i)peryleneGood
Benzo(k)fluorantheneGood
Cadmium and Its CompoundsGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
Mercury and Its CompoundsGood
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
Tributyltin CompoundsGood
Priority substancesGoodDoes not require assessment
Cypermethrin (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
Other PollutantsDoes not require assessmentDoes not require assessment

Why do all water bodies have a chemical status of fail?

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
RNAGFlowGroundwater abstractionIndustryHydrological RegimeDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGFlowGroundwater abstractionWater IndustryHydrological RegimeDetails
RNAGFlowSurface water abstractionAgriculture and rural land managementHydrological RegimeDetails
RNAGFlowGroundwater abstractionAgriculture and rural land managementHydrological RegimeDetails

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 management0002000
Industry0001000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0001000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total0004000

Objectives

Classification ItemStatusYearReasons
EcologicalGood2015
Biological quality elementsGood2015
FishGood2015
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2015
Physico-chemical quality elementsGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2015
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2015
CopperHigh2015
IronHigh2015
ManganeseHigh2015
ZincHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
Benzo(a)pyreneGood2015
Benzo(b)fluorantheneGood2015
Benzo(g-h-i)peryleneGood2015
Benzo(k)fluorantheneGood2015
Cadmium and Its CompoundsGood2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2015
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Tributyltin CompoundsGood2015
Priority substancesGood2015
Cypermethrin (Priority)Good2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Ely Ouse and Cut-off channel NVZS390Nitrates Directive
Anglian ChalkG71Nitrates Directive

Monitoring sites which have been used to classify this water body

Shows which sites were used for classification for which years within each cycle.

Monitoring SiteCycle 1Cycle 2Cycle 3
CAVENHAM STR.SHEEPWASH RD.BR.BARROW 37M3020192019
CAVENHAM STR.ACCESS TRACK MILL HEATH 37M312009, 2013, 2014, 20122013, 2016, 2014, 2015, 20192019
LOWER OUSE/CAVENHAM STREAM/CAVENHAM MILL/ 44792009, 2013
55971 559712012, 2013, 2011, 20092016, 2013, 2014, 2015, 20192019
LOWER OUSE/CAVENHAM STREAM/D/S CAVENHAM MILL/ 370912013, 2014, 20122015, 2013, 2016, 2019, 20142019, 2022
LOWER OUSE/CAVENHAM STREAM/LARK CONFLUENCE/ 370922013, 2014, 2012

Upstream water bodies

    Downstream water bodies