Piddle (Lower) Water Body

Moderate ecological status

Attributes

  • Water Body IDGB108044010080
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSY7885494406
  • Catchment area3778.841 ha
  • Length27.31 km
  • Catchment area37.788 km2
  • Surveillance Water BodyYes

Classifications

Classification Item20192022
EcologicalModerateModerate
Biological quality elementsModerateModerate
FishModerateModerate
InvertebratesHighHigh
Macrophytes and Phytobenthos CombinedModerateModerate
Macrophytes Sub ElementModerateModerate
Phytobenthos Sub ElementModerateModerate
Physico-chemical quality elementsHighHigh
Acid Neutralising CapacityHighHigh
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenHighHigh
PhosphateHighHigh
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeSupports goodSupports good
Specific pollutantsHighHigh
ArsenicHighHigh
CopperHighHigh
IronHighHigh
ManganeseHighHigh
PendimethalinHighHigh
ZincHighHigh
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
Benzo(a)pyreneGood
Cadmium and Its CompoundsGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
HexachlorocyclohexaneGood
Mercury and Its CompoundsFail
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
QuinoxyfenGood
Priority substancesGoodDoes not require assessment
AclonifenGood
AlachlorGood
BifenoxGood
CybutryneGood
Cypermethrin (Priority)Good
Dichlorvos (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
TerbutrynGood
Other PollutantsGoodDoes not require assessment
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
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RFDSuspect dataNot applicableNo sector responsibleFishDetails
RNAGPhysical modificationBarriers - ecological discontinuitySector under investigationFishDetails
RNAGFlowNo further action (Flow is below the EFI but NOT causing an ecological failure)No sector responsibleHydrological RegimeDetails
RNAGDiffuse sourcePoor soil managementAgriculture and rural land managementFishDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGOther pressuresEcological recovery time - surface watersOtherMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceTrade/Industry dischargeIndustryMacrophytes and Phytobenthos CombinedDetails

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 investigation1000000
Total1000000

Objectives

Classification ItemStatusYearReasons
EcologicalGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Biological quality elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
FishGood2015
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Physico-chemical quality elementsGood2015
Acid Neutralising CapacityGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2015
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2021Disproportionately expensive: Disproportionate burdens
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2015
ArsenicHigh2015
CopperHigh2015
IronHigh2015
ManganeseHigh2015
PendimethalinHigh2015
ZincHigh2015
ChemicalGood2063Disproportionately expensive: Disproportionate burdens;
Natural conditions: Chemical status recovery time;
Technically infeasible: Cause of adverse impact unknown
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
Benzo (b) and (k) fluorantheneGood2015
Benzo (ghi) perelyene and indeno (123-cd) pyreneGood2015
Benzo(a)pyreneGood2015
Cadmium and Its CompoundsGood2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
HexachlorocyclohexaneGood2015
Mercury and Its CompoundsGood2040Natural conditions: Chemical status recovery time
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
QuinoxyfenGood2015
Priority substancesGood2015
AclonifenGood2015
AlachlorGood2015
BifenoxGood2015
CybutryneGood2015
Cypermethrin (Priority)Good2015
Dichlorvos (Priority)Good2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
TerbutrynGood2015
Other PollutantsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens;
Technically infeasible: Cause of adverse impact unknown
Aldrin, Dieldrin, Endrin & IsodrinGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens;
Technically infeasible: Cause of adverse impact unknown
para - para DDTGood2015

Protected areas

PA NameIdDirectiveMore information
South WessexG151Nitrates Directive
Poole HarbourET1Nitrates Directive
Poole HarbourUK11054Ramsar SiteNatural England
Dorset HeathsUK0019857Special Area of ConservationNatural England
Dorset HeathlandsUK11021Ramsar SiteNatural England
Poole Harbour WestUKSW54Shellfish Water Directive
Poole Harbour and Holes BayUKENCA117Urban Waste Water Treatment 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 PIDDLE AT EIGHT HATCHES 504501512014, 2012, 2013, 20092014, 2015, 2013, 2016, 20192019
9048 90482011, 2013, 2012, 2014, 2010, 20092015, 2014, 2013, 2016, 20192022, 2019
PIDDLE/BAGGS MILL/ 227702010, 2013, 2011, 2009
PIDDLE/CHAMBERLAYNES FARM/ 300682013, 2011, 2014, 2012
RIVER PIDDLE AT TURNERSPUDDLE 504301442011, 2014, 2012, 2010, 2013, 2009
PIDDLE/TRIGON/ 196122010, 2013, 2011, 2014, 2012, 20092016, 2014, 20192019
RIVER PIDDLE AT WEST MILLS 504501292011, 2014, 2009, 2010, 2013, 20122014, 2016, 2019, 2013, 20152019, 2022
PIDDLE AT HYDE ESTATE RSN06212022
PIDDLE/PIDDLE JSM AND EEL/TRIGON/ 361742011
RIVER PIDDLE AT HYDE 504501972014, 2012, 2013, 2009
9047 90472012, 2010, 2011
9044 90442012, 2010, 2013, 2011, 2014
PIDDLE/SOUTHOVER FARM/ 137272010, 2013, 2011, 2014, 2012, 20092015, 2013, 2016, 2014, 20192022, 2019
PIDDLE/U/S WAREHAM/ 196112010, 2011, 2012, 2009
144784 1447842013, 2011, 20142015, 2014, 2016, 2013, 20192019
PIDDLE U/S CHAMBERLAYNES FARM 504301092011, 2014, 2012, 2013, 2010, 20092014, 2015, 2013, 2016, 20192019
PIDDLE/BRIANTSPUDDLE/ 227682010, 2013, 2011, 2014, 2012, 2009
PIDDLE/TURNERSPUDDLE/ 222562010, 2013, 2011, 2014, 2012, 2009
155478 1554782013, 20142015, 2014, 2013
PIDDLE/ATHELHAMPTON/ 300672013, 2011, 2014, 2012
PIDDLE/THROOP/ 130982010, 2013, 2011, 2014, 2012, 20092015, 2013, 2016, 2014, 20192022, 2019

Downstream water bodies