Churn (source to Perrots Brook) Water Body

Moderate ecological status

Attributes

  • Water Body IDGB106039029810
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSP0069612516
  • Surveillance Water BodyYes
  • Length16.936 km
  • Catchment area58.642 km2
  • Catchment area5864.169 ha

Classifications

Classification Item20192022
EcologicalModerateModerate
Biological quality elementsModerateModerate
FishModerateModerate
InvertebratesHighModerate
Macrophytes and Phytobenthos CombinedModerateModerate
Macrophytes Sub ElementModerateModerate
Phytobenthos Sub ElementGoodGood
Physico-chemical quality elementsHighHigh
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenHighHigh
PhosphateHighHigh
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeSupports goodSupports good
MorphologySupports goodSupports good
Specific pollutantsHighHigh
ChlorothalonilHighHigh
Chromium (VI)HighHigh
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
NonylphenolGood
PentachlorobenzeneGood
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
QuinoxyfenGood
Tributyltin CompoundsGood
Priority substancesGoodDoes not require assessment
1,2-dichloroethaneGood
AclonifenGood
AlachlorGood
BenzeneGood
BifenoxGood
Cypermethrin (Priority)Good
DichloromethaneGood
Dichlorvos (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
TrichloromethaneGood
Other PollutantsGoodDoes not require assessment
Carbon TetrachlorideGood
DDT TotalGood
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
RNAGDiffuse sourcePoor Livestock ManagementAgriculture and rural land managementFishDetails
RNAGPhysical modificationBarriers - ecological discontinuityOtherFishDetails
RNAGPhysical modificationLand drainageAgriculture and rural land managementFishDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGSuspect dataNot applicableNo sector responsibleMacrophytes and Phytobenthos CombinedDetails
RNAGInvasive non-native speciesNorth american signal crayfishNo sector responsibleFishDetails
RNAGFlowGroundwater abstractionMining and quarryingMacrophytes 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 management1000010
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0000000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other1000000
No sector responsible0000000
Sector under investigation0000000
Total2000010

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
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
ChlorothalonilHigh2015
Chromium (VI)High2015
CopperHigh2015
IronHigh2015
ManganeseHigh2015
PendimethalinHigh2015
ZincHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
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
NonylphenolGood2015
PentachlorobenzeneGood2015
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
QuinoxyfenGood2015
Tributyltin CompoundsGood2015
Priority substancesGood2015
1,2-dichloroethaneGood2015
AclonifenGood2015
AlachlorGood2015
BenzeneGood2015
BifenoxGood2015
Cypermethrin (Priority)Good2015
DichloromethaneGood2015
Dichlorvos (Priority)Good2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
TrichloromethaneGood2015
Other PollutantsGood2015
Carbon TetrachlorideGood2015
DDT TotalGood2015
para - para DDTGood2015

Protected areas

PA NameIdDirectiveMore information
Cotswold JurassicG83Nitrates Directive
Upper Thames (Leach to Evenlode)SWSGZ4012Safeguard Zone
Thames (Churn to Coln) NVZS457Nitrates 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
THAMES/UPPER THAMES/RIVER CHURN/MARSDEN MANOR - U/S OF ROAD BRIDGE/ 324292011, 2012, 2010, 2013
CHURN ABOVE COCKLEFORD F/F PUTR02142016, 2019, 20152019
THAMES/UPPER THAMES/RIVER CHURN/MARSDEN MANOR - MAIN CHANNEL (BELOW WEIR)/ 324312011, 2012, 2010, 2013
THAMES/UPPER THAMES/RIVER CHURN/NORTH CERNEY/ 220672011, 2009, 2014, 2012, 2010, 20132016, 2019, 2014, 2015, 20132022, 2019
89727 897272013, 2011, 2014, 2012
THAMES/UPPER THAMES/RIVER CHURN/MARSDEN MANOR - SMALL CHANNEL (BY-PASS)/ 324412011, 2012, 2010, 2013
173724 1737242016, 2015, 20192022, 2019
THAMES/UPPER THAMES/RIVER CHURN/HAMMERTON (DS N CERNEY SITE)/ 409062012, 2013
154962 1549622013, 2011
CHURN AT NORTH CERNEY PUTR00142009, 2011, 2014, 2012, 2013, 20102016, 2019, 2014, 2015, 20132019
36222 362222014, 2009, 2012, 2013, 2010, 20112013, 2016, 2019, 2015, 20142019, 2022
THAMES/UPPER THAMES/RIVER CHURN/RIVER CHURN - COLESBOURNE/ 85582011, 2009, 2013
35768 357682013, 2011
CHURN 300M BELOW COCKLEFORD FISH FARM PUTR02132009, 2011, 2014, 2012, 2013, 2010

Upstream water bodies

    Downstream water bodies