Ems Water Body Poor ecological status
Attributes Water Body ID GB107041012370 Water Body Type River Hydromorphological designation heavily modified NGR SU7677208103 Catchment area 60.125 km2 Surveillance Water Body No Length 8.799 km Catchment area 6012.481 ha Classifications Classification Item 2019 2022 Ecological Poor Poor Biological quality elements Poor Poor Fish Poor Poor Invertebrates Moderate High Macrophytes and Phytobenthos Combined High High Macrophytes Sub Element High High Physico-chemical quality elements Moderate High Acid Neutralising Capacity High High Ammonia (Phys-Chem) High High Dissolved oxygen Moderate High Phosphate High High Temperature High High pH High High Hydromorphological Supporting Elements Supports good Supports good Hydrological Regime Does not support good Does not support good Supporting elements (Surface Water) Moderate Moderate Mitigation Measures Assessment Moderate or less Moderate or less Specific pollutants High High Copper High High Iron High High Manganese High High Zinc High High Chemical Fail Does not require assessment Priority hazardous substances Fail Does not require assessment Benzo(a)pyrene 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 Mercury and Its Compounds Fail Perfluorooctane sulphonate (PFOS) Good Polybrominated diphenyl ethers (PBDE) Fail Priority substances Good Does not require assessment Cypermethrin (Priority) Good Fluoranthene Good Lead and Its Compounds Good Nickel and Its Compounds Good Other Pollutants Does not require assessment Does not require assessment
Why do all water bodies have a chemical status of fail?
Investigations into classification status Classification Element Cycle Year Status Outcome Fish 2 2013 Poor Very certain there is a problem Invertebrates 2 2015 Moderate Quite certain there is a problem Copper 2 2013 Moderate Uncertain there is a problem Hydrological Regime 2 2013 Does Not Support Good Very 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 Type SWMI Activity Category Classification Element More information RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Mercury and Its Compounds Details RNAG Flow Groundwater abstraction Water Industry Invertebrates Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Polybrominated diphenyl ethers (PBDE) Details RFD Point source Sewage discharge (intermittent) Water Industry Dissolved oxygen Details RNAG Physical modification Flood protection - structures Urban and transport Dissolved oxygen Details RNAG Physical modification Other (not in list, must add details in comments) Local and Central Government Mitigation Measures Assessment Details RNAG Physical modification Flood protection - structures Urban and transport Invertebrates Details RNAG Flow Groundwater abstraction Water Industry Hydrological Regime Details RNAG Physical modification Flood protection - structures Urban and transport Fish Details RNAG Flow Groundwater abstraction Water Industry Fish 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 1 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 0 0 0 0 0 0 0 Total 1 0 0 0 0 0 0
Objectives Classification Item Status Year Reasons Ecological Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Biological quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Fish Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Invertebrates Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Macrophytes and Phytobenthos Combined Not assessed 2027 - Low confidence Physico-chemical quality elements Good 2015 Acid Neutralising Capacity Good 2015 Ammonia (Phys-Chem) Good 2015 Dissolved oxygen Good 2015 Phosphate Good 2015 Temperature Good 2015 pH Good 2015 Hydromorphological Supporting Elements Supports good 2015 Hydrological Regime Supports good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens 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 Iron High 2015 Manganese 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 Benzo(a)pyrene 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 Mercury and Its Compounds Good 2040 Natural conditions: Chemical status recovery time Perfluorooctane sulphonate (PFOS) Good 2015 Polybrominated diphenyl ethers (PBDE) Good 2063 Natural conditions: Chemical status recovery time Priority substances Good 2015 Cypermethrin (Priority) Good 2015 Fluoranthene Good 2015 Lead and Its Compounds Good 2015 Nickel and Its Compounds Good 2015 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information Chichester Harbour UKENCA56 Urban Waste Water Treatment Directive Chichester,Langstone and Portsmouth Harbours Eutrophic NVZ (TraC) ET2 Nitrates Directive Sussex Chalk G56 Nitrates Directive Chichester Harbour (Emsworth Channel) UKSW30 Shellfish 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 Site Cycle 1 Cycle 2 Cycle 3 82657 82657 2014 2014, 2016, 2015 156030 156030 2022 RIVER EMS A259 ROAD BRIDGE F0003395 2012, 2010, 2013, 2011, 2014, 2009 2015, 2013, 2016, 2014, 2019 2022, 2019 WESTERN STREAMS/RIVER EMS/LUMLEY MILL SQ/ 3464 2013, 2011, 2012, 2010, 2009 2013 43022 43022 2009 WARBLINGTON STREAM NO 1 G0003611 2012, 2010, 2013, 2011, 2009 SOUTHLEIGH STRM G0003610 2012, 2013, 2011, 2009 WESTERN STREAMS/RIVER EMS/D/S HAMPSHIRE BRIDGE/ 36495 2013, 2011, 2012 WESTERN STREAMS/RIVER EMS/BROOK MEADOW FOOTBRIDGE/ 63983 2016, 2019 2019 WESTERN STREAMS/RIVER EMS/WESTBOURNE SQ/ 3465 2013, 2011, 2014, 2012, 2010, 2009 2015, 2013, 2016, 2014, 2019 2019