Loddon (Swallowfield to River Thames confluence) Water Body

Moderate ecological status

Attributes

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

Classifications

Classification Item20192022
EcologicalModerateModerate
Biological quality elementsModerateModerate
FishModerateModerate
InvertebratesHighHigh
Macrophytes and Phytobenthos CombinedGoodGood
Macrophytes Sub ElementGoodGood
Phytobenthos Sub ElementHighHigh
Physico-chemical quality elementsModerateModerate
Acid Neutralising CapacityHighHigh
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenHighHigh
PhosphateModerateModerate
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeSupports goodSupports good
MorphologySupports goodSupports good
Specific pollutantsHighHigh
ArsenicHighHigh
CopperHighHigh
IronHighHigh
ManganeseHighHigh
PermethrinHighHigh
TriclosanHighHigh
ZincHighHigh
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
Benzo(a)pyreneGood
Cadmium and Its CompoundsGood
Di(2-ethylhexyl)phthalate (Priority hazardous)Good
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
HexachlorocyclohexaneGood
Mercury and Its CompoundsGood
NonylphenolGood
Perfluorooctane sulphonate (PFOS)Fail
Polybrominated diphenyl ethers (PBDE)Fail
Tributyltin CompoundsGood
Priority substancesGoodDoes not require assessment
1,2-dichloroethaneGood
Cypermethrin (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
PentachlorophenolGood
TrichlorobenzenesGood
TrichloromethaneGood
Other PollutantsGoodDoes not require assessment
Aldrin, Dieldrin, Endrin & IsodrinGood
Carbon TetrachlorideGood
DDT TotalGood
TetrachloroethyleneGood
TrichloroethyleneGood
para - para DDTGood

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
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RFDSuspect dataNot applicableNo sector responsibleFishDetails
RNAGUnknown (pending investigation)Unknown (pending investigation)Sector under investigationPerfluorooctane sulphonate (PFOS)Details
RNAGPhysical modificationBarriers - ecological discontinuityOtherFishDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details

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
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
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 (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
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
HexachlorocyclohexaneGood2015
Mercury and Its CompoundsGood2015
NonylphenolGood2015
Perfluorooctane sulphonate (PFOS)Good2039Technically infeasible: No known technical solution is available
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Tributyltin CompoundsGood2015
Priority substancesGood2015
1,2-dichloroethaneGood2015
Cypermethrin (Priority)Good2015
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 NameIdDirectiveMore information
Lower Thames (Cookham Egham Teddington)SWSGZ4016Safeguard Zone
SheeplandsG88Nitrates Directive
Emm Brook NVZS460Nitrates Directive

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 LODDON/ARBORFIELD/ARBORFIELD WEIR CHANNEL 3/ 304952013, 2011, 2012, 2010, 2009
35966 359662013, 2012, 2011, 2009, 2014, 20102013, 2016, 2014, 2015
RIVER LODDON/ARBORFIELD/ARBORFIELD BYPASS CHANNEL/ARBORFIELD BYPASS - UPPER SECTION/ 449612013
RIVER LODDON/ARBORFIELD/ARBORFIELD MAIN CHANNEL/ 50252013, 2011, 2014, 2012, 2010, 20092013, 2014
RIVER LODDON/WHISTLEY MILL/ 50492009
LODDON AT A4 ROADBRIDGE, TWYFORD, BERKS PLDR00292010, 2013, 2012, 2011, 2009, 20142015, 2019, 2016, 2013, 20142022, 2019
RIVER LODDON/TWYFORD LH CHANNEL/ 50442013, 2011, 2014, 2012, 2010, 20092015, 2013, 2016, 2019, 20142019, 2022
155426 1554262013, 2011, 20142014, 2013, 2016, 2015
LODDON AT LODDON DRIVE, WARGRAVE PLDR00322012, 2013, 2010, 2011, 2014, 20092015, 2016, 2013, 2014, 20192022, 2019
RIVER LODDON/TWYFORD RH CHANNEL D/S/ 726232022
RIVER LODDON/ARBORFIELD/ARBORFIELD WEIR CHANNEL 2/ 304942013, 2011, 2012, 2010, 2009
RIVER LODDON/ARBORFIELD/FARLEY ESTATE (WADING)/ 304982013, 2011, 2012, 2010, 2009
36032 360322012, 2013, 2011
RIVER LODDON/ARBORFIELD/ARBORFIELD MILL STREAM/ 293832009
LODDON AT ARBORFIELD BRIDGE PLDR00302012, 2013, 2014, 2009
RIVER LODDON/ARBORFIELD/FARLEY ESTATE U/S OF A327 (BOAT)/ 304972013, 2011, 2014, 2012, 2010, 20092015, 2013, 2016, 2014
RIVER LODDON/ARBORFIELD/U/S A327 BRIDGE/ 304962013, 2011, 2012, 2010, 2009
RIVER LODDON/TWYFORD RH CHANNEL/ 125312013, 2011, 2010, 20092013
RIVER LODDON/BLACKWATER/WHITEWATER/PARK FARM/ 51082012
RIVER LODDON/SHEEPBRIDGE/ 207412013, 20142015, 2013, 2019, 20142019, 2022
RIVER LODDON/ARBORFIELD/ARBORFIELD BYPASS CHANNEL/ARBORFIELD BYPASS - LOWER SECTION/ 395672013
RIVER LODDON/ARBORFIELD/ARBORFIELD WEIR CHANNEL 1/ 304932013, 2011, 2012, 2010, 2009
144445 1444452010, 2013, 20112015, 2013, 2016

Downstream water bodies