Dorset / Hampshire Water Body

Good ecological status


  • Water Body IDGB620705550000
  • Water Body TypeCoastal Water
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRSZ1119879772
  • Surface area51344.463 ha
  • Surface area513.445 km2
  • Surveillance Water BodyNo


Classification Item2019
Biological quality elementsGood
Physico-chemical quality elementsGood
Dissolved Inorganic NitrogenGood
Dissolved oxygenHigh
Hydromorphological Supporting ElementsSupports good
MorphologySupports good
Specific pollutantsHigh
Priority hazardous substancesFail
Cadmium and Its CompoundsGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
Mercury and Its CompoundsFail
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
Other PollutantsDoes not require assessment

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
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryDissolved Inorganic NitrogenDetails
RNAGDiffuse sourceCoastal Background DINNo sector responsibleDissolved Inorganic NitrogenDetails
RNAGDiffuse sourceAtmospheric depositionOtherDissolved Inorganic NitrogenDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementDissolved Inorganic NitrogenDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementDissolved Inorganic NitrogenDetails

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
Mining and quarrying0000000
Urban and transport0000000
Water Industry0000000
Local & central government0000000
Domestic general public0000000
Waste treatment and disposal0000000
No sector responsible0000000
Sector under investigation0000000


Classification ItemStatusYearReasons
EcologicalGood2021Disproportionately expensive: Disproportionate burdens
Biological quality elementsGood2015
Physico-chemical quality elementsGood2021Disproportionately expensive: Disproportionate burdens
Dissolved Inorganic NitrogenGood2021Disproportionately expensive: Disproportionate burdens
Dissolved oxygenGood2015
Hydromorphological Supporting ElementsNot assessed2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
Cadmium and Its CompoundsGood2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2021Natural conditions: Chemical status recovery time
Hexabromocyclododecane (HBCDD)Good2015
Mercury and Its CompoundsGood2040Natural conditions: Chemical status recovery time
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Priority substancesGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Poole HarbourET1Nitrates Directive
Poole HarbourUK11054Ramsar SiteNatural England
Dorset HeathsUK0019857Special Area of ConservationNatural England
Durdle Door EastUK20100Bathing Water Directive
Dorset Heaths (Purbeck & Wareham) & Studland DunesUK0030038Special Area of ConservationNatural England
Isle Of Portland To Studland CliffsUK0019861Special Area of ConservationNatural England
Portland Harbour EastUKSW57Shellfish Water Directive
Dorset HeathlandsUK11021Ramsar SiteNatural England
Solent MaritimeUK0030059Special Area of ConservationNatural England
Bournemouth PierUK19100Bathing Water Directive
Solent And Dorset CoastUK9020330Special Protection AreaNatural England
South Wight MaritimeUK0030061Special Area of ConservationNatural England
Solent & Southampton WaterUK9011061Special Protection AreaNatural England
Solent & Southampton WaterUK11063Ramsar SiteNatural England
Christchurch BayUK17200Bathing Water Directive
Swanage CentralUK19800Bathing Water Directive
Poole Branksome ChineUK19170Bathing Water Directive
Isle Of Wight DownsUK0016254Special Area of ConservationNatural England
Ringstead BayUK20300Bathing Water Directive
Poole BayUKSW55Shellfish Water Directive
Poole HarbourUK9010111Special Protection AreaNatural England
Compton BayUK17400Bathing Water Directive
Bournemouth Manor StepsUK19050Bathing Water Directive
Poole Harbour and Holes BayUKENCA117Urban Waste Water Treatment Directive
Studland To PortlandUK0030382Special Area of ConservationNatural England
Church Ope CoveUK20500Bathing Water Directive
St Albans Head To Durlston HeadUK0019863Special Area of ConservationNatural England
Bournemouth Boscombe PierUK19060Bathing Water Directive
Poole Canford Cliffs ChineUK19190Bathing Water Directive
Lulworth CoveUK20000Bathing Water Directive
Shambles BankUKSW59Shellfish Water Directive
Bournemouth Hengistbury WestUK19000Bathing Water Directive
Milford-on-seaUK17100Bathing Water Directive
Studland Knoll HouseUK19700Bathing Water Directive
Poole Harbour NorthUKSW52Shellfish Water Directive
Kimmeridge BayUK19900Bathing Water Directive
Poole Shore Road BeachUK19200Bathing Water Directive
Shell Bay NorthUK19600Bathing Water Directive
Poole Sandbanks PeninsularUK19350Bathing Water Directive
Bournemouth SouthbourneUK19020Bathing Water Directive
HighcliffeUK17300Bathing Water Directive
Bournemouth Alum ChineUK19160Bathing Water Directive
Bournemouth Durley ChineUK19150Bathing Water Directive
Bournemouth Fisherman`s WalkUK19030Bathing Water Directive
Christchurch Highcliffe CastleUK18700Bathing Water Directive
Durdle Door WestUK20200Bathing Water 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
SHAMBLES BANK SHELLFISH WATER 500346952011, 2010, 2013, 20122015
POOLE BAY SHELLFISH WATER 500244732011, 2010, 2013, 20122015
SWANAGE STW DANGEROUS SUBSTANCES POINT 500345152011, 2012, 2010, 2009

Downstream water bodies