Valley Brook (Englesea Brook to Weaver) Water Body

Moderate ecological status

Attributes

  • Water Body IDGB112068055310
  • Water Body TypeRiver
  • Hydromorphological designationheavily modified
  • NGRSJ6936755512
  • Catchment area8.294 km2
  • Catchment area829.43 ha
  • Surveillance Water BodyNo
  • Length8.162 km

Classifications

Classification Item20192022
EcologicalModerateModerate
Biological quality elementsBadBad
FishBadBad
InvertebratesModerateModerate
Macrophytes and Phytobenthos Combined
Macrophytes Sub ElementPoorPoor
Physico-chemical quality elementsModerateModerate
Ammonia (Phys-Chem)GoodHigh
Biochemical Oxygen Demand (BOD)High
Dissolved oxygenHighHigh
PhosphatePoorModerate
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeSupports goodSupports good
Supporting elements (Surface Water)ModerateModerate
Mitigation Measures AssessmentModerate or lessModerate or less
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)Fail
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

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
RNAGInvasive non-native speciesOther crayfishNo sector responsibleFishDetails
RNAGPoint sourceFarm/site infrastructureAgriculture and rural land managementPhosphateDetails
RNAGDiffuse sourceUnknown (pending investigation)Urban and transportFishDetails
RNAGDiffuse sourcePoor soil managementAgriculture and rural land managementPhosphateDetails
RNAGDiffuse sourceUrbanisation - urban developmentUrban and transportFishDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementPhosphateDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGDiffuse sourcePoor Livestock ManagementAgriculture and rural land managementPhosphateDetails
RNAGDiffuse sourceUrbanisation - urban developmentUrban and transportPhosphateDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGDiffuse sourcePoor Livestock ManagementAgriculture and rural land managementInvertebratesDetails
RNAGUnknown (pending investigation)Unknown (pending investigation)Sector under investigationPerfluorooctane sulphonate (PFOS)Details
RFDPhysical modificationBarriers - ecological discontinuityUrban and transportFishDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGPhysical modificationRecreationUrban and transportFishDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Urban and transportMitigation 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 management0000030
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport2020000
Water Industry0100000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000100
Sector under investigation0000000
Total2120130

Objectives

Classification ItemStatusYearReasons
EcologicalModerate2015Disproportionately expensive: Disproportionate burdens;
Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use;
Technically infeasible: No known technical solution is available
Biological quality elementsModerate2027 - Low confidenceDisproportionately expensive: Disproportionate burdens;
Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use;
Technically infeasible: No known technical solution is available
FishModerate2027 - Low confidenceDisproportionately expensive: Disproportionate burdens;
Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use
InvertebratesGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Macrophytes and Phytobenthos CombinedNot assessed2015Disproportionately expensive: Disproportionate burdens;
Technically infeasible: No known technical solution is available
Physico-chemical quality elementsModerate2015Disproportionately expensive: Disproportionate burdens;
Technically infeasible: No known technical solution is available
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateModerate2027 - Low confidenceDisproportionately expensive: Disproportionate burdens;
Technically infeasible: No known technical solution is available
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;
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
River Weaver (Dane to Frodsham) NVZS636Nitrates 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
VALLEY BROOK AT MACON WAY 880006812014, 20092016, 2015, 2014, 20192019
VALLEY BROOK AT MARSHFIELD BRIDGE 8800069720142015, 2014, 20162022
68054 6805420142016, 2019, 2014, 20152019
66342 663422009, 2014, 2010, 20112016, 2019, 2014, 20152019
WEAVER/VALLEY BROOK/WEVA12/ 126802010, 2009, 2013, 20142015, 2013, 2016, 2014

Downstream water bodies