Middle Ouse Water Body

Moderate ecological status

Attributes

  • Water Body IDGB107041012710
  • Water Body TypeRiver
  • Hydromorphological designationheavily modified
  • NGRTQ4246322187
  • Catchment area2732.16 ha
  • Length14.873 km
  • Catchment area27.322 km2
  • Surveillance Water BodyNo

Classifications

Classification Item2019
EcologicalModerate
Biological quality elementsModerate
FishModerate
InvertebratesHigh
Macrophytes and Phytobenthos CombinedModerate
Phytobenthos Sub ElementModerate
Physico-chemical quality elementsModerate
Ammonia (Phys-Chem)High
Dissolved oxygenHigh
PhosphatePoor
TemperatureHigh
pHHigh
Supporting elements (Surface Water)Good
Mitigation Measures AssessmentGood
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 CompoundsFail
Perfluorooctane sulphonate (PFOS)Fail
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGood
Cypermethrin (Priority)Good
FluorantheneGood
Other PollutantsDoes not require assessment

Why do all water bodies have a chemical status of fail?

Investigations into classification status

Classification ElementCycleYearStatusOutcome
Macrophytes and Phytobenthos Combined22014ModerateQuite certain there is a problem
Fish22013PoorQuite certain there is a problem

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
RNAGPhysical modificationBarriers - ecological discontinuitySector under investigationFishDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
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
RFDPhysical modificationBarriers - ecological discontinuitySector under investigationFishDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryMacrophytes 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 Industry0200000
Local & central government0000000
Domestic general public0000000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation1000000
Total1200000

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 elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsNot assessed2015
Supporting elements (Surface Water)Good2015
Mitigation Measures AssessmentGood2015
Specific pollutantsNot assessed2015
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(a)pyreneGood2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2040Natural conditions: Chemical status recovery time
Perfluorooctane sulphonate (PFOS)Good2039Technically infeasible: No known technical solution is available
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Priority substancesGood2015
Cypermethrin (Priority)Good2015
FluorantheneGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
River OuseSWSGZ4008Safeguard Zone
River OuseUKENRI147Urban 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
OUSE/OUSE TRIBUTARIES/SEARLES STREAM/RUTTINGHAM FARM/ 105792009
42051 420512009, 2010, 2011, 2014
42005 420052010, 2009, 20142016, 2015, 2014
OUSE/SHARPSBRIDGE/ 71072012, 2010, 2013, 2009, 2011
OUSE/FLETCHING MILL DOWNSTREAM/ 345642010, 2013
R OUSE SHEFFIELD PARK STATION F00021622011, 2014, 2012, 2009, 2010, 20132015, 2013, 2016
R OUSE FLETCHING MILL F00021612011, 2014, 2012, 2009, 2010, 20132015, 2013, 2016
R OUSE FRESHFIELD BRIDGE F00021642014, 2012, 2009, 20132015, 2013, 2016
SEARLES LK STRM RD BR PILTDOWN F00023742011, 2012, 2009, 2010
OUSE/FLETCHING MILL UPSTREAM/ 345632010
OUSE/SLOOP WEIR DOWNSTREAM/ 401872013
42630 426302012, 2010, 2011, 20142016, 2015, 2014
SHEFFIELD PK-PELLINGFORD STRM F00023782009
OUSE/SUTTON HALL WEIR DOWNSTREAM/ 404482013
R OUSE GOLDBRIDGE F00021582011, 2014, 2012, 2009, 2010, 20132014, 2015, 2013, 2016
OUSE/SUTTON HALL WEIR UPSTREAM/ 404472013
OUSE/OUSE TRIBUTARIES/SEARLES STREAM/DENNIKER FARM/ 124072009
OUSE/SLOOP/ 54412014, 2012, 2010, 2013, 2009, 20112014, 2015, 2013, 2016, 20192019
OUSE/SHEFFIELD BRIDGE/ 71062014, 2012, 2010, 2013, 2009, 20112014, 2015, 2013, 2016, 20192019
OUSE/NEWICK/ 107222014, 2012, 2010, 2013, 2009, 20112014, 2015, 2013, 2016, 20192019
R OUSE SHARPSBRIDGE F00021562014, 20092014, 2015, 2016

Downstream water bodies