Stanford Brook Water Body

Moderate ecological status

Attributes

  • Water Body IDGB106039017450
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRTQ2899433496
  • Catchment area18.128 km2
  • Surveillance Water BodyNo
  • Length9.704 km
  • Catchment area1812.778 ha

Classifications

Classification Item2019
EcologicalModerate
Biological quality elementsModerate
FishModerate
InvertebratesGood
Macrophytes and Phytobenthos CombinedGood
Phytobenthos Sub ElementGood
Physico-chemical quality elementsGood
Ammonia (Phys-Chem)High
Dissolved oxygenGood
PhosphateHigh
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeHigh
MorphologySupports good
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)Fail
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGood
Cypermethrin (Priority)Good
FluorantheneGood
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
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGPhysical modificationReservoir / Impoundment - non flow relatedAgriculture and rural land managementFishDetails
RNAGPhysical modificationBarriers - ecological discontinuityLocal and Central GovernmentFishDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryFishDetails
RNAGUnknown (pending investigation)Unknown (pending investigation)Sector under investigationPerfluorooctane sulphonate (PFOS)Details
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGPhysical modificationBarriers - ecological discontinuityAgriculture and rural land managementFishDetails
RFDHigh to Good deterioration, no action required (RFD only)Not applicableNo sector responsibleDissolved oxygenDetails
RNAGDiffuse sourceTransport DrainageUrban and transportFishDetails
RNAGPhysical modificationUrbanisation - transportUrban and transportFishDetails
RNAGPhysical modificationBarriers - ecological discontinuityUrban and transportFishDetails

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 management2000000
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport2010000
Water Industry0100000
Local & central government1000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total5110000

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 CombinedGood2015
Physico-chemical quality elementsGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2015
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
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

No data to show

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
RIVER MOLE/MOLE TRIBUTARIES/GATWICK STREAM/STANFORD BROOK/BENNETT CLOSE/ 395682014, 2012, 20132014, 2015, 2013, 2016, 20192019
185351 18535120192019
155025 15502520142015, 2014, 2013, 2016
GATWICK STREAM AT HAWORTH ROAD PMLR03142012, 2013, 20142019, 2015, 2013, 2016, 20142019
185329 18532920192019
RIVER MOLE/MOLE TRIBUTARIES/GATWICK STREAM/STANFORD BROOK/D/S CLAYS LAKE/ 119492010, 2009, 20112015, 2016, 20192019
155026 15502620132015, 2013, 2016
185348 18534820192019
RIVER MOLE/MOLE TRIBUTARIES/GATWICK STREAM/U/S OF M23/ 322402012, 2010, 2011
GATWICK STREAM AT TINSLEY BRIDGE, TINSLE PMLR00132009, 2010, 2011
RIVER MOLE/MOLE TRIBUTARIES/GATWICK STREAM/STANFORD BROOK/U/S CLAYS LAKE/ 396272014, 2012, 20132014, 2015, 2013, 2016
GATWICK STREAM ABOVE POND 'E' PMLR00122009, 2010, 2011
GATWICK STREAM ABOVE MOLE PMLR00112010, 2011

Upstream water bodies