Thornhill Ditch and tributaries at Cotswolds Water Park Water Body Moderate ecological status
Get Thornhill Ditch and tributaries at Cotswolds Water Park data Attributes Water Body ID GB106039029760 Water Body Type River Hydromorphological designation not designated artificial or heavily modified NGR SU1929799300 Catchment area 26.075 km2 Surveillance Water Body No Length 3.386 km Catchment area 2607.451 ha Classifications Classification Item 2019 Ecological Moderate Biological quality elements Moderate Invertebrates High Macrophytes and Phytobenthos Combined Moderate Macrophytes Sub Element Moderate Physico-chemical quality elements High Ammonia (Phys-Chem) High Dissolved oxygen High Phosphate High Temperature High pH High Hydromorphological Supporting Elements Supports good Hydrological Regime Does not support good Morphology Supports good Chemical Fail Priority hazardous substances Fail Benzo(a)pyrene Good Benzo(b)fluoranthene Good Benzo(g-h-i)perylene Good Benzo(k)fluoranthene 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 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 measures delivered to address reason, awaiting recovery Not applicable No sector responsible Mercury and Its Compounds Details RNAG Physical modification Quarry Mining and quarrying Macrophytes and Phytobenthos Combined Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Polybrominated diphenyl ethers (PBDE) Details RNAG Physical modification Reservoir / Impoundment - non flow related Other Dissolved oxygen Details RNAG Flow Groundwater abstraction Water Industry Hydrological Regime 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 1 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 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 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 2021 Disproportionately expensive: Disproportionate burdens Biological quality elements Good 2015 Invertebrates Good 2015 Macrophytes and Phytobenthos Combined Good 2015 Physico-chemical quality elements Good 2021 Disproportionately expensive: Disproportionate burdens Ammonia (Phys-Chem) Good 2015 Dissolved oxygen Good 2021 Disproportionately expensive: Disproportionate burdens Phosphate Good 2015 Temperature Good 2015 pH Good 2015 Hydromorphological Supporting Elements Supports good 2015 Hydrological Regime Does not support good 2015 Disproportionately expensive: Unfavourable balance of costs and benefits Supporting elements (Surface Water) Not assessed 2015 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 Benzo(b)fluoranthene Good 2015 Benzo(g-h-i)perylene Good 2015 Benzo(k)fluoranthene 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 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information Upper Thames (Leach to Evenlode) SWSGZ4012 Safeguard Zone
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 COLN AT ROUNDHOUSE, LECHLADE PUTR0039 2014, 2009, 2013, 2012, 2011, 2010 WILLOWTREE FARM AT ROUNDHOUSE TRACK PUTR0358 2014 2019, 2015, 2016, 2014 2019 160718 160718 2014 2016, 2015, 2014 COLN AT GAUGING STATION, BIBURY PUTR0037 2009, 2013, 2011, 2014, 2012, 2010 COLN AT WITHINGTON PUTR0040 2009, 2013, 2011, 2014, 2012, 2010 COLN AT FOSSEBRIDGE PUTR0036 2009, 2013, 2011, 2014, 2012, 2010