Hoe Stream (Normandy to Pirbright) Water Body

Poor ecological status

Attributes

  • Water Body IDGB106039017870
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSU9368753834
  • Catchment area923.63 ha
  • Length5.511 km
  • Catchment area9.236 km2
  • Surveillance Water BodyNo

Classifications

Classification Item2019
EcologicalPoor
Biological quality elementsPoor
FishPoor
InvertebratesGood
Macrophytes and Phytobenthos CombinedModerate
Macrophytes Sub ElementModerate
Physico-chemical quality elementsModerate
Acid Neutralising CapacityHigh
Ammonia (Phys-Chem)High
Dissolved oxygenPoor
PhosphateHigh
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeHigh
MorphologySupports good
Specific pollutantsModerate
CopperHigh
IronModerate
ManganeseHigh
ZincHigh
ChemicalFail
Priority hazardous substancesFail
Benzo(a)pyreneGood
Benzo(b)fluorantheneGood
Benzo(g-h-i)peryleneGood
Benzo(k)fluorantheneGood
Cadmium and Its CompoundsFail
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
Mercury and Its CompoundsGood
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGood
Cypermethrin (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
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
RNAGNaturalNatural mineralisationNo sector responsibleIronDetails
RNAGNaturalNatural conditions - otherNo sector responsibleDissolved oxygenDetails
RNAGPhysical modificationBarriers - ecological discontinuityOtherFishDetails
RNAGPoint sourceTrade/Industry dischargeIndustryCadmium and Its CompoundsDetails
RNAGNaturalNatural mineralisationNo sector responsibleMacrophytes and Phytobenthos CombinedDetails
RNAGNaturalNatural conditions - otherNo sector responsibleMacrophytes and Phytobenthos CombinedDetails
RNAGPhysical modificationLand use - arableAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGNaturalDroughtNo sector responsibleDissolved oxygenDetails

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 management1000000
Industry0010000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0000000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other1000000
No sector responsible0000000
Sector under investigation0000000
Total2010000

Objectives

Classification ItemStatusYearReasons
EcologicalGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Biological quality elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
FishGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Physico-chemical quality elementsGood2015
Acid Neutralising CapacityGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2015
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
CopperHigh2015
IronHigh2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
ManganeseHigh2015
ZincHigh2015
ChemicalGood2063Disproportionately expensive: Disproportionate burdens;
Natural conditions: Chemical status recovery time
Priority hazardous substancesGood2063Disproportionately expensive: Disproportionate burdens;
Natural conditions: Chemical status recovery time
Benzo(a)pyreneGood2015
Benzo(b)fluorantheneGood2015
Benzo(g-h-i)peryleneGood2015
Benzo(k)fluorantheneGood2015
Cadmium and Its CompoundsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2015
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Priority substancesGood2015
Cypermethrin (Priority)Good2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Lower Thames (Cookham Egham Teddington)SWSGZ4016Safeguard Zone
WeySWSGZ4015Safeguard Zone
Thursley, Ash, Pirbright & ChobhamUK0012793Special Area of ConservationNatural 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
STANFORD BROOK BELOW HENLEY PARK LAKE PWER02142011, 2009, 2010, 2013, 2014, 20122015, 2016, 2019, 2013, 20142019
WEY AT SOMERSET BRIDGE, ELSTEAD PWER00462009
160922 16092220142016, 2015, 2019, 20142019
RIVER WEY/WEY COMBINED/HOE STREAM/ROYAL OAK/ 328192019, 20162019
73845 738452012, 2011

Upstream water bodies