LANGSTONE HARBOUR Water Body

Moderate ecological status

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Attributes

Water Body IDGB580705130000
Water Body TypeTransitional Water
Hydromorphological designationheavily modified
NGRSU6951402666
Surveillance Water BodyNo
Surface area19.027 km2
Surface area1902.686 ha

Classifications

Classification Item	2019	2022
Ecological	Moderate	Moderate
Biological quality elements	Moderate	Moderate
Angiosperms	Moderate	Moderate
Saltmarsh	Moderate	Moderate
Invertebrates	Good	Good
Infaunal Quality Index	Good	Good
Macroalgae	Good	Good
Opportunistic Macroalgae	Good	Good
Phytoplankton	High	High
Physico-chemical quality elements	Good	Good
Dissolved Inorganic Nitrogen	Good	Good
Dissolved oxygen	High	High
Hydromorphological Supporting Elements	Supports good	Supports good
Hydrological Regime	Supports good	Supports good
Supporting elements (Surface Water)	Moderate	Moderate
Mitigation Measures Assessment	Moderate or less	Moderate or less
Specific pollutants	High	High
Copper	High	High
Zinc	High	High
Chemical	Fail	Does not require assessment
Priority hazardous substances	Fail	Does not require assessment
Anthracene	Good
Benzo(a)pyrene	Good
Benzo(b)fluoranthene	Good
Benzo(g-h-i)perylene	Good
Benzo(k)fluoranthene	Good
Cadmium and Its Compounds	Good
Dioxins and dioxin-like compounds	Good
Heptachlor and cis-Heptachlor epoxide	Good
Hexabromocyclododecane (HBCDD)	Good
Hexachlorobenzene	Good
Hexachlorobutadiene	Good
Hexachlorocyclohexane	Good
Mercury and Its Compounds	Fail
Pentachlorobenzene	Good
Perfluorooctane sulphonate (PFOS)	Good
Polybrominated diphenyl ethers (PBDE)	Fail
Quinoxyfen	Good
Tributyltin Compounds	Good
Priority substances	Good	Does not require assessment
Aclonifen	Good
Alachlor	Good
Bifenox	Good
Fluoranthene	Good
Lead and Its Compounds	Good
Napthalene	Good
Nickel and Its Compounds	Good
Other Pollutants	Good	Does not require assessment
Aldrin, Dieldrin, Endrin & Isodrin	Good
para - para DDT	Good

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

Investigations into classification status

Classification Element	Cycle	Year	Status	Outcome
Hydrological Regime	2	2013	Does Not Support Good	Uncertain 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 Type	SWMI	Activity	Category	Classification Element	More information
RNAG	Unknown (pending investigation)	Unknown (pending investigation)	Sector under investigation	Mercury and Its Compounds	Details
RNAG	Physical modification	Other (not in list, must add details in comments)	Local and Central Government	Mitigation Measures Assessment	Details
RNAG	Physical modification	Other (not in list, must add details in comments)	Local and Central Government	Mitigation Measures Assessment	Details
RNAG	measures delivered to address reason, awaiting recovery	Not applicable	No sector responsible	Polybrominated diphenyl ethers (PBDE)	Details
RNAG	Physical modification	Coastal squeeze	Sector under investigation	Angiosperms	Details
RNAG	measures delivered to address reason, awaiting recovery	Not applicable	No sector responsible	Mercury and Its Compounds	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 issue	Physical modifications	Pollution from waste water	Pollution from towns, cities and transport	Changes to the natural flow and level of water	Invasive non-native species	Pollution from rural areas	Pollution from abandoned mines
Agriculture and rural land management	0	0	0	0	0	0	0
Industry	0	0	0	0	0	0	0
Mining and quarrying	0	0	0	0	0	0	0
Navigation	0	0	0	0	0	0	0
Urban and transport	0	0	0	0	0	0	0
Water Industry	0	0	0	0	0	0	0
Local & central government	2	0	0	0	0	0	0
Domestic general public	0	0	0	0	0	0	0
Recreation	0	0	0	0	0	0	0
Waste treatment and disposal	0	0	0	0	0	0	0
Other	0	0	0	0	0	0	0
No sector responsible	0	0	0	0	0	0	0
Sector under investigation	1	0	0	0	0	0	0
Total	3	0	0	0	0	0	0

Objectives

Classification Item	Status	Year	Reasons
Ecological	Good	2027 - Low confidence	Disproportionately expensive: Disproportionate burdens; Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use
Biological quality elements	Moderate	2021	Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use
Angiosperms	Moderate	2021	Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use
Invertebrates	Good	2015
Macroalgae	Good	2015
Phytoplankton	Good	2015
Physico-chemical quality elements	Good	2015
Dissolved Inorganic Nitrogen	Good	2015
Dissolved oxygen	Good	2015
Hydromorphological Supporting Elements	Supports good	2015
Hydrological Regime	Supports good	2015
Supporting elements (Surface Water)	Good	2027 - Low confidence	Disproportionately expensive: Disproportionate burdens
Mitigation Measures Assessment	Good	2027 - Low confidence	Disproportionately expensive: Disproportionate burdens
Specific pollutants	High	2015
Copper	High	2015
Zinc	High	2015
Chemical	Good	2063	Natural conditions: Chemical status recovery time
Priority hazardous substances	Good	2063	Natural conditions: Chemical status recovery time
Anthracene	Good	2015
Benzo(a)pyrene	Good	2015
Benzo(b)fluoranthene	Good	2015
Benzo(g-h-i)perylene	Good	2015
Benzo(k)fluoranthene	Good	2015
Cadmium and Its Compounds	Good	2015
Dioxins and dioxin-like compounds	Good	2015
Heptachlor and cis-Heptachlor epoxide	Good	2015
Hexabromocyclododecane (HBCDD)	Good	2015
Hexachlorobenzene	Good	2015
Hexachlorobutadiene	Good	2015
Hexachlorocyclohexane	Good	2015
Mercury and Its Compounds	Good	2040	Natural conditions: Chemical status recovery time
Pentachlorobenzene	Good	2015
Perfluorooctane sulphonate (PFOS)	Good	2015
Polybrominated diphenyl ethers (PBDE)	Good	2063	Natural conditions: Chemical status recovery time
Quinoxyfen	Good	2015
Tributyltin Compounds	Good	2015
Priority substances	Good	2015
Aclonifen	Good	2015
Alachlor	Good	2015
Bifenox	Good	2015
Fluoranthene	Good	2015
Lead and Its Compounds	Good	2015
Napthalene	Good	2015
Nickel and Its Compounds	Good	2015
Other Pollutants	Good	2015
Aldrin, Dieldrin, Endrin & Isodrin	Good	2015
para - para DDT	Good	2015

Protected areas

PA Name	Id	Directive	More information
Chichester,Langstone and Portsmouth Harbours Eutrophic NVZ (TraC)	ET2	Nitrates Directive
Chichester And Langstone Harbours	UK9011011	Special Protection Area	Natural England
Solent Maritime	UK0030059	Special Area of Conservation	Natural England
Chichester And Langstone Harbours	UK11013	Ramsar Site	Natural England
Solent And Dorset Coast	UK9020330	Special Protection Area	Natural England
Langstone Harbour	UKSW33	Shellfish Water Directive
Chichester Harbour (Emsworth Channel)	UKSW30	Shellfish Water Directive
Portsmouth Harbour	UKENCA111	Urban Waste Water Treatment Directive
Portsmouth Harbour	UKSW34	Shellfish Water Directive
Langstone Harbour	UKENCA55	Urban 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 Site	Cycle 1	Cycle 2	Cycle 3
LANGSTONE HARBOUR CSEMP MUSSELS G0006529		2015, 2016, 2019	2019
BROOM CHANNEL GREAT SALTERNS G0003484		2019	2019

LANGSTONE HARBOUR Water Body

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Related links

Attributes

Classifications

Investigations into classification status

Reasons for not achieving good (RNAG) and reasons for deterioration (RFD)

Reasons for not achieving good status by business sector

Objectives

Protected areas

Monitoring sites which have been used to classify this water body

Upstream water bodies

Downstream water bodies

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LANGSTONE HARBOUR Water Body

Get LANGSTONE HARBOUR data

Related links

Attributes

Classifications

Investigations into classification status

Reasons for not achieving good (RNAG) and reasons for deterioration (RFD)

Reasons for not achieving good status by business sector

Objectives

Protected areas

Monitoring sites which have been used to classify this water body

Upstream water bodies

Downstream water bodies