Caul Bourne Water Body Moderate ecological status
Attributes Water Body ID GB107101006020 Water Body Type River Hydromorphological designation heavily modified NGR SZ4153888176 Catchment area 12.63 km2 Surveillance Water Body No Catchment area 1262.98 ha Length 4.594 km Classifications Classification Item 2019 2022 Ecological Moderate Moderate Biological quality elements Good Good Fish Good Good Invertebrates High High Physico-chemical quality elements Moderate Moderate Ammonia (Phys-Chem) High High Dissolved oxygen High High Phosphate Moderate Moderate Temperature High High pH High High Supporting elements (Surface Water) Moderate Moderate Mitigation Measures Assessment Moderate or less Moderate or less Chemical Fail Does not require assessment Priority hazardous substances Fail Does not require assessment Benzo(a)pyrene Good Dioxins and dioxin-like compounds Good Heptachlor and cis-Heptachlor epoxide Good Hexabromocyclododecane (HBCDD) Good Hexachlorobenzene Good Hexachlorobutadiene Good Mercury and Its Compounds Good Perfluorooctane sulphonate (PFOS) Good Polybrominated diphenyl ethers (PBDE) Fail Priority substances Good Does not require assessment Cypermethrin (Priority) Good Fluoranthene 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 Hydrological Regime 2 2014 Does Not Support Good Uncertain there is a problem Fish 2 2016 Good Quite 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 Polybrominated diphenyl ethers (PBDE) Details RNAG Physical modification Barriers - ecological discontinuity Other Fish Details RNAG Physical modification Other (not in list, must add details in comments) Local and Central Government Mitigation Measures Assessment Details RNAG Point source Sewage discharge (continuous) Water Industry Phosphate 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 1 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 1 0 0 0 0 0
Objectives Classification Item Status Year Reasons Ecological Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Biological quality elements Good 2015 Fish Good 2015 Invertebrates Good 2015 Physico-chemical quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Ammonia (Phys-Chem) Good 2015 Dissolved oxygen Good 2015 Phosphate Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Temperature Good 2015 pH Good 2015 Hydromorphological Supporting Elements Not assessed 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 Not assessed 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 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 2015 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 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information Newtown harbour, Mediina Estuary and Eastern Yar Eutrophic NVZ (TraC) ET7 Nitrates Directive Isle Of Wight Downs UK0016254 Special Area of Conservation Natural England
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 CAULE BOURNE AT SHALFLEET Y0004347 2014, 2012, 2009 2014, 2016, 2019, 2015 2019, 2022 CAULE BOURNE AT B 34 Y0004350 2014, 2009 2016, 2019, 2015, 2014 2019, 2022 142231 142231 2011, 2014, 2010, 2009 2016, 2014, 2013, 2015 42721 42721 2011, 2014, 2010, 2009 2016, 2014, 2015 ISLE OF WIGHT/CAUL BOURNE/SHALFLEET/ 50389 2016, 2019, 2015 2019, 2022 ISLE OF WIGHT/CAUL BOURNE/CALBOURNE MILL/ 50390 2016, 2019, 2015 2019, 2022