Holywell Stream Water Body Moderate ecological status
Attributes Water Body ID GB108049000710 Water Body Type River Hydromorphological designation not designated artificial or heavily modified NGR SW7963256426 Catchment area 23.668 km2 Catchment area 2366.762 ha Length 9.426 km Surveillance Water Body No Classifications Classification Item 2019 Ecological Moderate Biological quality elements Moderate Fish Moderate Invertebrates High Macrophytes and Phytobenthos Combined High Macrophytes Sub Element High Physico-chemical quality elements High Acid Neutralising Capacity High Ammonia (Phys-Chem) High Dissolved oxygen High Phosphate High Temperature High pH High Hydromorphological Supporting Elements Supports good Hydrological Regime High Morphology Supports good Specific pollutants Moderate Copper High Iron High Manganese High Zinc Moderate Chemical Fail Priority hazardous substances Fail 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 Cypermethrin (Priority) Good Fluoranthene Good Lead and Its Compounds Good Nickel and Its Compounds Good Other Pollutants Does 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 Type SWMI Activity Category Classification Element More information RNAG Diffuse source Abandoned mine Mining and quarrying Zinc Details RNAG Point source Abandoned mine Mining and quarrying Zinc Details RNAG Suspect data Not applicable No sector responsible Fish Details RNAG Physical modification Barriers - ecological discontinuity Other Fish Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Polybrominated diphenyl ethers (PBDE) 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 2 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 0 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 1 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 2
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 2015 Macrophytes and Phytobenthos Combined Good 2015 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 2015 Supporting elements (Surface Water) Not assessed 2015 Specific pollutants High 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Copper High 2015 Iron High 2015 Manganese High 2015 Zinc High 2027 - Low confidence Disproportionately expensive: Disproportionate burdens 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 Penhale Dunes UK0012559 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 COASTAL STREAMS/RED RIVER TO GANNEL/HOLYWELL/MAIN HOLYWELL STREAM/U/S ELLENGLAZE/ 16017 2012, 2009, 2010, 2013, 2011, 2014 2015, 2013, 2016, 2014 HOLYWELL STREAM AT HOLYWELL BAY BRIDGE 82312304 2009 2015, 2016, 2019 2019 10867 10867 2014, 2009 2014, 2016, 2019, 2015 2019 10853 10853 2019 2019 HOLYWELL STREAM AT TRELASKE 82312334 2009 COASTAL STREAMS/RED RIVER TO GANNEL/HOLYWELL/MAIN HOLYWELL STREAM/UPSTREAM TRELUDDEROW STREAM/ 69246 2019 2019