Colne (Gt. Yeldham - Doe's Corner) Water Body

Poor ecological status

Attributes

  • Water Body IDGB105037041260
  • Water Body TypeRiver
  • Hydromorphological designationheavily modified
  • NGRTL7816535156
  • Catchment area26.597 km2
  • Surveillance Water BodyNo
  • Length10.221 km
  • Catchment area2659.698 ha

Classifications

Classification Item2019
EcologicalPoor
Biological quality elementsPoor
FishPoor
InvertebratesGood
Macrophytes and Phytobenthos CombinedHigh
Phytobenthos Sub ElementHigh
Physico-chemical quality elementsModerate
Ammonia (Phys-Chem)High
Dissolved oxygenModerate
PhosphatePoor
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeDoes not support good
Supporting elements (Surface Water)Moderate
Mitigation Measures AssessmentModerate or less
ChemicalFail
Priority hazardous substancesFail
Benzo(a)pyreneGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
Mercury and Its CompoundsFail
Perfluorooctane sulphonate (PFOS)Fail
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGood
Cypermethrin (Priority)Good
FluorantheneGood
Other PollutantsDoes 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
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementPhosphateDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGPhysical modificationBarriers - ecological discontinuityAgriculture and rural land managementFishDetails
RNAGNaturalDroughtNo sector responsibleFishDetails
RNAGNaturalDroughtNo sector responsibleFishDetails
RNAGFlowLow Flow (not drought)No sector responsibleDissolved oxygenDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryDissolved oxygenDetails
RNAGDiffuse sourcePoor soil managementAgriculture and rural land managementFishDetails
RNAGFlowSurface water abstractionAgriculture and rural land managementHydrological RegimeDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Local and Central GovernmentMitigation Measures AssessmentDetails
RNAGFlowGroundwater abstractionWater IndustryHydrological RegimeDetails
RNAGDiffuse sourcePoor soil managementAgriculture and rural land managementInvertebratesDetails
RNAGNaturalDroughtNo sector responsibleInvertebratesDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGUnknown (pending investigation)Unknown (pending investigation)Sector under investigationPerfluorooctane sulphonate (PFOS)Details
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGPhysical modificationOther (not in list, must add details in comments)Agriculture and rural land managementMitigation Measures AssessmentDetails

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 management1000020
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0200000
Local & central government1000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total2200020

Objectives

Classification ItemStatusYearReasons
EcologicalModerate2027 - Low confidenceDisproportionately expensive: Disproportionate burdens;
Disproportionately expensive: Unfavourable balance of costs and benefits
Biological quality elementsModerate2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
FishModerate2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
InvertebratesGood2021Disproportionately expensive: Disproportionate burdens
Macrophytes and Phytobenthos CombinedGood2015
Physico-chemical quality elementsGood2027Disproportionately expensive: Unfavourable balance of costs and benefits
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2027Disproportionately expensive: Unfavourable balance of costs and benefits
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeDoes not support good2015Technically infeasible: No known technical solution is available
Supporting elements (Surface Water)Good2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Mitigation Measures AssessmentGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Specific pollutantsNot assessed2015
ChemicalGood2063Natural conditions: Chemical status recovery time;
Technically infeasible: No known technical solution is available
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time;
Technically infeasible: No known technical solution is available
Benzo(a)pyreneGood2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2040Natural conditions: Chemical status recovery time
Perfluorooctane sulphonate (PFOS)Good2039Technically infeasible: No known technical solution is available
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Priority substancesGood2015
Cypermethrin (Priority)Good2015
FluorantheneGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Sandlings and ChelmsfordG78Nitrates Directive
Colne NVZS437Nitrates 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
COLNE CATCHMENT/RIVER COLNE UPPER SUB CATCHMENT/RIVER COLNE UPPER/THE HEDINGHAMS/ 7932009, 2014, 2012, 2010, 2013, 20112016, 2019, 2014, 2015, 20132019
R.COLNE HOVIS MILL CL07362014, 20092015, 2016, 2019, 20142019
54651 546512013, 2016, 2019, 2014, 20152019
COLNE CATCHMENT/RIVER COLNE UPPER SUB CATCHMENT/RIVER COLNE UPPER/BROOK STREET FARM/ 7902009, 2014, 2012, 2010, 2013, 20112016, 2019, 2014, 2015, 20132019
54649 546492009, 20142013, 2016, 2019, 2015, 20142019
COLNE CATCHMENT/RIVER COLNE UPPER SUB CATCHMENT/RIVER COLNE UPPER/MAPLESTEAD MILL/ 7912009, 2014, 2012, 2010, 2013, 20112016, 2019, 2014, 2015, 20132019
COLNE CATCHMENT/RIVER COLNE UPPER SUB CATCHMENT/RIVER COLNE UPPER/ALDERFORD MILL/ 7922009, 2012, 2010, 2013, 2011
COLNE CATCHMENT/RIVER COLNE UPPER SUB CATCHMENT/RIVER COLNE UPPER/POOLE STREET/ 7952009, 2012, 2010, 2013, 2011
R.COLNE NUNNERY BR. CL082012, 2014, 2013, 2010, 2009, 20112015, 2014, 2016, 2019, 20132019
COLNE CATCHMENT/RIVER COLNE UPPER SUB CATCHMENT/RIVER COLNE UPPER/NUNNERY BRIDGE/ 7942009, 2014, 2012, 2010, 2013, 20112016, 2019, 2014, 2015, 20132019
R.COLNE GT. YELDHAM RD. BRIDGE CL08482013, 20142015, 2016, 2019, 2013, 20142019

Downstream water bodies