Yarrow DS Big Lodge Water Water Body

Moderate ecological status

Attributes

  • Water Body IDGB112070064952
  • Water Body TypeRiver
  • Hydromorphological designationheavily modified
  • NGRSD5776117992
  • Catchment area2226.03 ha
  • Length18.788 km
  • Catchment area22.26 km2
  • Surveillance Water BodyNo

Classifications

Classification Item20192022
EcologicalModerate
Biological quality elementsModerate
InvertebratesModerate
Macrophytes and Phytobenthos CombinedModerate
Macrophytes Sub ElementModerate
Phytobenthos Sub ElementModerate
Physico-chemical quality elementsModerate
Ammonia (Phys-Chem)High
Dissolved oxygenHigh
PhosphatePoor
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeSupports good
Supporting elements (Surface Water)Moderate
Mitigation Measures AssessmentModerate or less
Specific pollutantsHigh
IronHigh
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
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)Good
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGoodDoes not require assessment
Cypermethrin (Priority)Good
FluorantheneGood
Other PollutantsDoes not require assessmentDoes not require assessment

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

Investigations into classification status

Classification ElementCycleYearStatusOutcome
Phosphate22015Moderate

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
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGPoint sourceSewage discharge (intermittent)Water IndustryInvertebratesDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Sector under investigationMitigation Measures AssessmentDetails
RNAGPoint sourceMisconnectionsDomestic General PublicInvertebratesDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryMacrophytes and Phytobenthos CombinedDetails
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
RNAGPhysical modificationOther (not in list, must add details in comments)Sector under investigationMitigation Measures AssessmentDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Sector under investigationMitigation 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 management0000000
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0300000
Local & central government0000000
Domestic general public0010000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation4000000
Total4310000

Objectives

Classification ItemStatusYearReasons
EcologicalGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Biological quality elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
InvertebratesGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Macrophytes and Phytobenthos CombinedGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Physico-chemical quality elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Good2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Mitigation Measures AssessmentGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Specific pollutantsHigh2015
IronHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
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)Good2015
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
River YarrowUKENRI36Urban 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
R CHOR PTC YARROW 880105502012, 2009, 2010, 2013, 2011, 20142015, 2016, 2019, 2013, 20142019
92332 923322019, 2015, 2016, 20132019
65408 654082012, 2010, 2009, 2011, 20142016, 2015, 2014
CLANCUTT BROOK AT B5251 880031642009
RIVER RIBBLE/RIVER DOUGLAS/RIVER YARROW/COMMON BANK LANE/ 382882014, 2012, 2013
RIVER CHOR AT A581 RD BRIDGE 880031612009
RIVER YARROW UP STREAM OF CHORLEY ETW 880031652012, 2009, 2010, 2013, 2011, 2014
RIVER RIBBLE/RIVER DOUGLAS/RIVER YARROW/PINCOCK BRIDGE/ 40412011, 2012
RIVER YARROW AT A49 BRIDGE PINCOCK 880031672012, 2009, 2011, 2010, 2013, 20142015, 2016, 2019, 2013, 20142019

Upstream water bodies

Downstream water bodies