Hillylaid Pool - Main Dyke Water Body

Moderate ecological status

Attributes

  • Water Body IDGB112072066160
  • Water Body TypeRiver
  • Hydromorphological designationheavily modified
  • NGRSD3534243126
  • Catchment area1991.06 ha
  • Length7.326 km
  • Catchment area19.911 km2
  • Surveillance Water BodyNo

Classifications

Classification Item2019
EcologicalModerate
Biological quality elementsBad
InvertebratesBad
Macrophytes and Phytobenthos CombinedModerate
Phytobenthos Sub ElementModerate
Physico-chemical quality elementsModerate
Ammonia (Phys-Chem)Poor
Dissolved oxygenBad
PhosphatePoor
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeSupports 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)Good
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGood
FluorantheneGood
Other PollutantsDoes not require assessment

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

Investigations into classification status

Classification ElementCycleYearStatusOutcome
Ammonia (Phys-Chem)22015Poor

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
RNAGPoint sourceMisconnectionsDomestic General PublicDissolved oxygenDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementDissolved oxygenDetails
RNAGPoint sourceSewage discharge (continuous)Urban and transportInvertebratesDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementInvertebratesDetails
RNAGPoint sourceMisconnectionsDomestic General PublicAmmonia (Phys-Chem)Details
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementAmmonia (Phys-Chem)Details
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGPoint sourceMisconnectionsIndustryPhosphateDetails
RNAGPoint sourceMisconnectionsDomestic General PublicPhosphateDetails
RNAGPoint sourceMisconnectionsIndustryMacrophytes and Phytobenthos CombinedDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementPhosphateDetails
RNAGPoint sourceMisconnectionsDomestic General PublicMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceMisconnectionsIndustryDissolved oxygenDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Urban and transportMitigation Measures AssessmentDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Local and Central GovernmentMitigation Measures AssessmentDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGDiffuse sourceTransport DrainageUrban and transportDissolved oxygenDetails
RNAGDiffuse sourceContaminated landUrban and transportInvertebratesDetails

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 management0000050
Industry0030000
Mining and quarrying0000000
Navigation0000000
Urban and transport1120000
Water Industry0000000
Local & central government1000000
Domestic general public0040000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total2190050

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)Good2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Dissolved oxygenGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
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 pollutantsNot assessed2015
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
FluorantheneGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Morecambe Bay And Duddon EstuaryUK9020326Special Protection AreaNatural England
Morecambe BayUK11045Ramsar SiteNatural England

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
69453 694532009
64990 649902009
HILLYLAID POOL PTC RIVER WYRE 8800391920092016, 2015
ROYLES BROOK D/S HEYS STREET OVERFLOW 8800391220092016, 2015
ROYLES BROOK ADJACENT TO CORVIC 9 ROAD 880039152009
HILLYLAID POOL U/S OLD COURSE 880039162009
65996 6599620142016, 2015, 2014

Upstream water bodies

    Downstream water bodies