Lower River Cober Water Body

Moderate ecological status

Attributes

  • Water Body IDGB108048001172
  • Water Body TypeRiver
  • Hydromorphological designationheavily modified
  • NGRSW6523626457
  • Catchment area1928.729 ha
  • Length6.36 km
  • Catchment area19.287 km2
  • Surveillance Water BodyNo

Classifications

Classification Item2019
EcologicalModerate
Biological quality elementsModerate
Macrophytes and Phytobenthos CombinedModerate
Phytobenthos Sub ElementModerate
Physico-chemical quality elementsHigh
Ammonia (Phys-Chem)High
Dissolved oxygenHigh
PhosphateHigh
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeDoes not support good
Supporting elements (Surface Water)Moderate
Mitigation Measures AssessmentModerate or less
Specific pollutantsHigh
ChlorothalonilHigh
Chromium (VI)High
CopperHigh
IronHigh
ManganeseHigh
PendimethalinHigh
ZincHigh
ChemicalFail
Priority hazardous substancesFail
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
HexachlorocyclohexaneGood
Mercury and Its CompoundsFail
NonylphenolGood
PentachlorobenzeneGood
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
QuinoxyfenGood
Tributyltin CompoundsGood
Priority substancesGood
1,2-dichloroethaneGood
AclonifenGood
AlachlorGood
BenzeneGood
BifenoxGood
CybutryneGood
Cypermethrin (Priority)Good
DichloromethaneGood
Dichlorvos (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
TerbutrynGood
TrichloromethaneGood
Other PollutantsGood
Carbon TetrachlorideGood
DDT TotalGood
para - para DDTGood

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
RNAGPhysical modificationFlood protection - structuresLocal and Central GovernmentMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryMacrophytes and Phytobenthos CombinedDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Sector under investigationMitigation Measures AssessmentDetails
RNAGDiffuse sourceAbandoned mineMining and quarryingCopperDetails
RNAGNaturalNatural mineralisationNo sector responsibleCopperDetails
RNAGDiffuse sourcePoor soil managementAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceAbandoned mineMining and quarryingCopperDetails
RNAGDiffuse sourcePoor Livestock ManagementAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGSuspect dataNot applicableNo sector responsibleMacrophytes and Phytobenthos CombinedDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Sector under investigationMitigation Measures AssessmentDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGFlowSurface water abstractionWater IndustryHydrological 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 management0000020
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0101000
Local & central government1000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation2000000
Total3101020

Objectives

Classification ItemStatusYearReasons
EcologicalGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Biological quality elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
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)Good2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Mitigation Measures AssessmentGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Specific pollutantsHigh2015
ChlorothalonilHigh2015
Chromium (VI)High2015
CopperHigh2015
IronHigh2015
ManganeseHigh2015
PendimethalinHigh2015
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
HexachlorocyclohexaneGood2015
Mercury and Its CompoundsGood2040Natural conditions: Chemical status recovery time
NonylphenolGood2015
PentachlorobenzeneGood2015
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
QuinoxyfenGood2015
Tributyltin CompoundsGood2015
Priority substancesGood2015
1,2-dichloroethaneGood2015
AclonifenGood2015
AlachlorGood2015
BenzeneGood2015
BifenoxGood2015
CybutryneGood2015
Cypermethrin (Priority)Good2015
DichloromethaneGood2015
Dichlorvos (Priority)Good2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
TerbutrynGood2015
TrichloromethaneGood2015
Other PollutantsGood2015
Carbon TetrachlorideGood2015
DDT TotalGood2015
para - para DDTGood2015

Protected areas

PA NameIdDirectiveMore information
COBER NVZS694Nitrates Directive
The Loe Eutrophic lake NVZEL110Nitrates Directive
River Cober and Loe PoolUKENRI53Urban Waste Water Treatment 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
92593 925932012, 2013, 2014
10880 108802012, 2009, 2011, 2014, 2010, 20132015, 2014, 2016, 2013
CARMINOWE CREEK INFLOW TO LOE POOL 820102082013, 2014
PENROSE FEEDER INFLOW TO LOE POOL 820103472013, 2014
RIVER COBER D/S HELSTON STW 820101392010, 2009, 2011, 2012, 2013
RIVER COBER 200M D/S HELSTON STW 820101382016
COASTAL STREAMS/HELFORD TO HAYLE/COBER/MAIN COBER/ST. JOHNS/ 160072013, 2011, 2014, 2012
155693 1556932013, 2014
160949 16094920142015, 2016, 2014
RIVER COBER AT ST JOHNS BRIDGE 820101522019, 2015, 20162019
RIVER COBER AT INFLOW TO LOE POOL 820101302013, 2011, 2014, 20122013, 2019, 2016, 2015, 20142019
RIVER COBER AT LOE POOL BAR OUTFALL 820101112009

Downstream water bodies