Addlestone Bourne (West End to Hale/Mill Bourne confluence at Mimbridge) Water Body

Moderate ecological status

Attributes

  • Water Body IDGB106039017920
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSU9656961118
  • Catchment area2515.68 ha
  • Length12.424 km
  • Catchment area25.157 km2
  • Surveillance Water BodyNo

Classifications

Classification Item2019
EcologicalModerate
Biological quality elementsGood
InvertebratesHigh
Macrophytes and Phytobenthos CombinedGood
Macrophytes Sub ElementGood
Physico-chemical quality elementsModerate
Ammonia (Phys-Chem)Good
Dissolved oxygenGood
PhosphateModerate
TemperatureHigh
pHHigh
Hydromorphological Supporting ElementsSupports good
Hydrological RegimeSupports good
MorphologySupports good
Specific pollutantsModerate
IronModerate
ManganeseHigh
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 CompoundsGood
Perfluorooctane sulphonate (PFOS)Fail
Polybrominated diphenyl ethers (PBDE)Fail
Tributyltin CompoundsGood
Priority substancesFail
Cypermethrin (Priority)Fail
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
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
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails

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 Industry0100000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total0100000

Objectives

Classification ItemStatusYearReasons
EcologicalModerate2015Disproportionately expensive: Disproportionate burdens;
Disproportionately expensive: Unfavourable balance of costs and benefits;
Technically infeasible: Cause of adverse impact unknown
Biological quality elementsGood2021Disproportionately expensive: Disproportionate burdens
InvertebratesGood2021Disproportionately expensive: Disproportionate burdens
Macrophytes and Phytobenthos CombinedGood2015
Physico-chemical quality elementsModerate2015Disproportionately expensive: Disproportionate burdens;
Disproportionately expensive: Unfavourable balance of costs and benefits
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2021Disproportionately expensive: Disproportionate burdens
PhosphateModerate2015Disproportionately expensive: Unfavourable balance of costs and benefits
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2027 - Low confidenceTechnically infeasible: Cause of adverse impact unknown
IronHigh2027 - Low confidenceTechnically infeasible: Cause of adverse impact unknown
ManganeseHigh2015
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
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2015
Perfluorooctane sulphonate (PFOS)Good2039Technically infeasible: No known technical solution is available
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Tributyltin CompoundsGood2015
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
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
BOURNE ( SOUTH ) AT MIMBRIDGE, CHOBHAM PBNR00042013, 2010, 2009, 2011, 2014, 20122013, 2016, 2014, 2015
160130 1601302014, 20132015, 2014, 2013
155562 15556220132015, 2016, 2019, 20142019
155557 1555572013
36275 362752013

Upstream water bodies