Loddon (Swallowfield to River Thames confluence) Water Body

Moderate ecological status

Viewing latest data (Updated on 14 September 2021). Switch to draft river basin management plan data

Attributes

  • Water Body IDGB106039023160
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSU7883274568
  • Surveillance Water BodyNo
  • Length20.049 km
  • Catchment area51.894 km2
  • Catchment area5189.39 ha

Classifications

Classification Item20132014201520162019
EcologicalModerateModerateModeratePoorModerate
Biological quality elementsModerateGoodModeratePoorModerate
FishModerateGoodModeratePoorModerate
InvertebratesHighHighHighHighHigh
Macrophytes and Phytobenthos CombinedModerateGoodGoodGoodGood
Physico-chemical quality elementsModerateModerateModerateModerateModerate
Acid Neutralising CapacityHighHighHighHigh
Ammonia (Phys-Chem)HighHighHighHighHigh
Biochemical Oxygen Demand (BOD)HighHighHighHigh
Dissolved oxygenHighHighHighHighHigh
PhosphateModerateModerateModerateModerateModerate
TemperatureHighHighHighHighHigh
pHHighHighHighHighHigh
Hydromorphological Supporting ElementsSupports goodSupports goodSupports goodSupports goodSupports good
Hydrological RegimeSupports goodSupports goodSupports goodSupports goodSupports good
MorphologySupports goodSupports goodSupports goodSupports goodSupports good
Specific pollutantsModerateModerateHighHighHigh
ArsenicHighHighHighHighHigh
CopperHighHighHighHighHigh
IronHighHighHigh
ManganeseHighHighHighHighHigh
PermethrinHighHighHighHighHigh
TriclosanModerateModerateHighHighHigh
ZincHighHighHighHighHigh
ChemicalFailFailGoodGoodFail
Priority hazardous substancesFailFailGoodGoodFail
Benzo (b) and (k) fluorantheneGoodGoodGoodGood
Benzo (ghi) perelyene and indeno (123-cd) pyreneGoodGoodGoodGood
Benzo(a)pyreneFailGoodGoodGood
Cadmium and Its CompoundsGoodGoodGoodGoodGood
Di(2-ethylhexyl)phthalate (Priority hazardous)GoodGoodGoodGoodGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
HexachlorocyclohexaneGoodGoodGoodGoodGood
Mercury and Its CompoundsGoodGoodGood
NonylphenolGoodGoodGoodGoodGood
Perfluorooctane sulphonate (PFOS)Fail
Polybrominated diphenyl ethers (PBDE)GoodGoodFail
Tributyltin CompoundsFailGoodGood
Priority substancesGoodGoodGoodGoodGood
1,2-dichloroethaneGoodGoodGoodGoodGood
Cypermethrin (Priority hazardous)Good
FluorantheneGoodGoodGoodGoodGood
Lead and Its CompoundsGoodGoodGoodGoodGood
Nickel and Its CompoundsGoodGoodGoodGoodGood
PentachlorophenolGoodGoodGoodGoodGood
TrichlorobenzenesGoodGoodGoodGoodGood
TrichloromethaneGoodGoodGoodGoodGood
Other PollutantsGoodGoodGoodGoodGood
Aldrin, Dieldrin, Endrin & IsodrinGoodGoodGoodGoodGood
Carbon TetrachlorideGoodGoodGoodGoodGood
DDT TotalGoodGoodGoodGoodGood
TetrachloroethyleneGoodGoodGoodGoodGood
TrichloroethyleneGoodGoodGoodGoodGood
para - para DDTGoodGoodGoodGoodGood

Investigations into classification status

No data to show

Reasons for not achieving good (RNAG) and reasons for deterioration (RFD)

Reason TypeSWMIActivityCategoryClassification ElementMore information
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGPhysical modificationBarriers - ecological discontinuityOtherFishDetails
RFDSuspect dataNot applicableNo sector responsibleFishDetails

Reasons for not achieving good status by business sector

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 in water bodies, there may be more than one reason in a single water body.

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
EcologicalModerate2015Disproportionately expensive: Disproportionate burdens;
Technically infeasible: No known technical solution is available
Biological quality elementsGood2027Disproportionately expensive: Disproportionate burdens
FishGood2027Disproportionately expensive: Disproportionate burdens
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2015
Physico-chemical quality elementsModerate2015Technically infeasible: No known technical solution is available
Acid Neutralising CapacityGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateModerate2015Technically infeasible: No known technical solution is available
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2015
ArsenicHigh2015
CopperHigh2015
IronHigh2015
ManganeseHigh2015
PermethrinHigh2015
TriclosanHigh2015
ZincHigh2015
ChemicalGood2015
Priority hazardous substancesGood2015
Benzo (b) and (k) fluorantheneGood2015
Benzo (ghi) perelyene and indeno (123-cd) pyreneGood2015
Benzo(a)pyreneGood2015
Cadmium and Its CompoundsGood2015
Di(2-ethylhexyl)phthalate (Priority hazardous)Good2015
HexachlorocyclohexaneGood2015
Mercury and Its CompoundsGood2015
NonylphenolGood2015
Polybrominated diphenyl ethers (PBDE)Good2015
Priority substancesGood2015
1,2-dichloroethaneGood2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
PentachlorophenolGood2015
TrichlorobenzenesGood2015
TrichloromethaneGood2015
Other PollutantsGood2015
Aldrin, Dieldrin, Endrin & IsodrinGood2015
Carbon TetrachlorideGood2015
DDT TotalGood2015
TetrachloroethyleneGood2015
TrichloroethyleneGood2015
para - para DDTGood2015

Protected areas

PA NameIdDirectiveTypeMore information
SWSGZ4016SWSGZ4016Safeguard Zone
Sheeplands G88G88Nitrates Directive
Emm Brook NVZ S460S460Nitrates Directive

Downstream water bodies