Wey (Tilford to Shalford) Water Body

Poor ecological status

Attributes

  • Water Body IDGB106039017820
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSU8874243435
  • Catchment area63.274 km2
  • Surveillance Water BodyNo
  • Length23.332 km
  • Catchment area6327.391 ha

Classifications

Classification Item20192022
EcologicalPoorPoor
Biological quality elementsPoorPoor
FishPoorPoor
InvertebratesHighHigh
Macrophytes and Phytobenthos CombinedModerateModerate
Macrophytes Sub ElementGoodGood
Phytobenthos Sub ElementModerateModerate
Physico-chemical quality elementsModerateModerate
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenHighHigh
PhosphateModerateModerate
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeSupports goodSupports good
MorphologySupports goodSupports good
Specific pollutantsHighHigh
Chromium (VI)HighHigh
CopperHighHigh
IronHighHigh
ZincHighHigh
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
Benzo(a)pyreneGood
Benzo(b)fluorantheneGood
Benzo(g-h-i)peryleneFail
Benzo(k)fluorantheneGood
Cadmium and Its CompoundsGood
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 substancesFailDoes not require assessment
Cypermethrin (Priority)Fail
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
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
RNAGUnknown (pending investigation)Unknown (pending investigation)Sector under investigationBenzo(g-h-i)peryleneDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryMacrophytes and Phytobenthos CombinedDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RFDSuspect dataNot applicableNo sector responsibleFishDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGInvasive non-native speciesNorth american signal crayfishNo sector responsibleFishDetails
RNAGPhysical modificationReservoir / Impoundment - non flow relatedAgriculture and rural land managementFishDetails
RNAGPhysical modificationReservoir / Impoundment - non flow relatedNavigationFishDetails
RNAGPhysical modificationBarriers - ecological discontinuityOtherFishDetails
RNAGPhysical modificationReservoir / Impoundment - non flow relatedAgriculture and rural land managementFishDetails

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
Industry0000000
Mining and quarrying0000000
Navigation1000000
Urban and transport0000000
Water Industry0200000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total2200000

Objectives

Classification ItemStatusYearReasons
EcologicalGood2039Natural conditions: Ecological recovery time;
Technically infeasible: No known technical solution is available
Biological quality elementsGood2039Natural conditions: Ecological recovery time
FishGood2033Natural conditions: Ecological recovery time
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2039Natural conditions: Ecological recovery time
Physico-chemical quality elementsGood2027Technically infeasible: No known technical solution is available
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2027Technically infeasible: No known technical solution is available
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2015
Chromium (VI)High2015
CopperHigh2015
IronHigh2015
ZincHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time;
Technically infeasible: Cause of adverse impact unknown;
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
Benzo(b)fluorantheneGood2015
Benzo(g-h-i)peryleneGood2033Technically infeasible: No known technical solution is available
Benzo(k)fluorantheneGood2015
Cadmium and Its CompoundsGood2015
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 substancesGood2039Technically infeasible: Cause of adverse impact unknown
Cypermethrin (Priority)Good2039Technically infeasible: Cause of adverse impact unknown
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
WEY AT SOMERSET BRIDGE, ELSTEAD PWER00462011, 2014, 2010, 2013, 20122014, 2015, 2013, 2016, 20192022, 2019
35800 358002011, 2009, 2014, 2010, 20132014, 2016, 2015, 2013
WEY ABOVE CRANLEIGH WATERS PWER01512011, 2010, 2013, 2009, 20122019, 2015, 20162022, 2019
RIVER WEY/WEY COMBINED/U/S BROADFORD BRIDGE/ 509662016, 2019, 20152019
RIVER WEY/WEY COMBINED/UNSTEAD LOOP/ 56432013
RIVER WEY/WEY COMBINED/WHITMEAD/ 509652016, 2019, 20152019
WEY ABOVE GODALMING STW PWER00292011, 2014, 2010, 2009, 2012, 20132014, 2015, 2016, 2013
WEY AT ELSTEAD PWER01102010, 2013, 2011, 2009, 20122015, 2019, 20162022, 2019
RIVER WEY/WEY COMBINED/EASHING BRIDGE/ 56412013, 2011, 2014, 2012, 2010, 20092013, 2016, 2019, 2014, 20152019, 2022
RIVER WEY/WEY COMBINED/HELLS DITCH/HELLS DITCH 1/ 727902022
144446 1444462009, 2011, 2010