Stratford Brook Water Body

Good ecological status

Attributes

  • Water Body IDGB106039017890
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRTQ0661957267
  • Catchment area23.472 km2
  • Surveillance Water BodyNo
  • Length2.869 km
  • Catchment area2347.197 ha

Classifications

Classification Item20192022
EcologicalModerateGood
Biological quality elementsModerateGood
InvertebratesModerateGood
Macrophytes and Phytobenthos CombinedGoodGood
Macrophytes Sub ElementGoodGood
Physico-chemical quality elementsGoodGood
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenGoodGood
PhosphateGoodGood
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeDoes not support goodSupports good
MorphologySupports goodSupports good
Specific pollutantsHighHigh
TriclosanHighHigh
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
Benzo(a)pyreneGood
Di(2-ethylhexyl)phthalate (Priority hazardous)Good
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
Mercury and Its CompoundsGood
NonylphenolGood
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesFailDoes not require assessment
Cypermethrin (Priority)Fail
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
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGNaturalDroughtNo sector responsibleInvertebratesDetails
RNAGPhysical modificationLand use - arableAgriculture and rural land managementInvertebratesDetails

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 management0000000
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0000000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total0000000

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 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 pollutantsHigh2015
TriclosanHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time;
Technically infeasible: Cause of adverse impact unknown
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
Benzo(a)pyreneGood2015
Di(2-ethylhexyl)phthalate (Priority hazardous)Good2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2015
NonylphenolGood2015
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
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Lower Thames (Cookham Egham Teddington)SWSGZ4016Safeguard Zone
WeySWSGZ4015Safeguard Zone

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
STRATFORD BROOK ABOVE OCKHAM MILL STREAM PWER03192013, 2012, 2011, 20142013, 2016, 2014, 2015, 20192019
154039 1540392014, 2013, 20112016, 2014, 2013, 2019, 20152022, 2019
WEY ABOVE THAMES PWER00302010, 2009
WEY AT NEWARK LANE, PYRFORD PWER00372010, 2009
WEY ABOVE TILLINGBOURNE PWER00312010, 2009
WEY AT PLOUGH BRIDGE, BYFLEET PWER00382010, 2009
WEY AT CARTBRIDGE, SEND PWER00342010, 2009
OCKHAM MILL STREAM AT OCKHAM MILL PWER00142009

Upstream water bodies