Thet (US Swangey Fen) Water Body Moderate ecological status
Get Thet (US Swangey Fen) data Attributes Water Body ID GB105033047830 Water Body Type River Hydromorphological designation not designated artificial or heavily modified NGR TM0320895255 Catchment area 40.49 km2 Surveillance Water Body No Length 8.352 km Catchment area 4049.02 ha Classifications Classification Item 2019 2022 Ecological Moderate Moderate Biological quality elements Moderate Moderate Invertebrates High High Macrophytes and Phytobenthos Combined Moderate Moderate Macrophytes Sub Element Moderate Moderate Physico-chemical quality elements Moderate Moderate Acid Neutralising Capacity High High Ammonia (Phys-Chem) High High Biochemical Oxygen Demand (BOD) High Dissolved oxygen High Good Phosphate Moderate Moderate Temperature High High pH High High Hydromorphological Supporting Elements Supports good Supports good Hydrological Regime Supports good Supports good Morphology Supports good Supports good Specific pollutants High High Copper High High Iron 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 Di(2-ethylhexyl)phthalate (Priority hazardous) 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 Nonylphenol Good Perfluorooctane sulphonate (PFOS) Good Polybrominated diphenyl ethers (PBDE) Fail Priority substances Good Does not require assessment Cypermethrin (Priority) Good Fluoranthene 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 Phosphate 2 2013 Moderate Very certain there is a problem Dissolved oxygen 2 2015 Moderate 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 measures delivered to address reason, awaiting recovery Not applicable No sector responsible Polybrominated diphenyl ethers (PBDE) Details RFD Point source Sewage discharge (continuous) Water Industry Phosphate Details RNAG Diffuse source Poor nutrient management Agriculture and rural land management Phosphate Details RNAG Diffuse source Poor nutrient management Agriculture and rural land management Phosphate Details RNAG Point source Sewage discharge (continuous) Water Industry Phosphate Details RNAG Physical modification Land drainage Agriculture and rural land management Macrophytes and Phytobenthos Combined Details RNAG Point source Sewage discharge (continuous) Water Industry Macrophytes and Phytobenthos Combined Details RNAG Diffuse source Poor nutrient management Agriculture and rural land management Macrophytes and Phytobenthos Combined Details RNAG Diffuse source Poor nutrient management Agriculture and rural land management Macrophytes and Phytobenthos Combined 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 1 0 0 0 0 4 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 2 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 2 0 0 0 4 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 Invertebrates Good 2015 Macrophytes and Phytobenthos Combined Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Physico-chemical quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Acid Neutralising Capacity Good 2015 Ammonia (Phys-Chem) Good 2015 Dissolved oxygen Good 2021 Disproportionately expensive: Disproportionate burdens Phosphate Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens 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 2015 Copper High 2015 Iron High 2015 Chemical Good 2063 Natural conditions: Chemical status recovery time Priority hazardous substances Good 2063 Natural conditions: Chemical status recovery time Benzo (b) and (k) fluoranthene Good 2015 Benzo (ghi) perelyene and indeno (123-cd) pyrene Good 2015 Benzo(a)pyrene Good 2015 Cadmium and Its Compounds Good 2015 Di(2-ethylhexyl)phthalate (Priority hazardous) 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 Nonylphenol 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 Nickel and Its Compounds Good 2015 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information Ely Ouse and Cut-off channel NVZ S390 Nitrates 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 R.THET WESTCAR RD.BR.ATTLEBOROUGH 44M02 2013, 2011, 2014, 2012, 2010, 2009 2016, 2013, 2015, 2014, 2019 2022, 2019 R.THET CROWSHALL RD.BR.ATTLEBOROUGH 44M01 2013, 2011, 2014, 2012, 2010, 2009 2013, 2015, 2016, 2014, 2019 2022, 2019 55906 55906 2010, 2013, 2011, 2014, 2009, 2012 2015, 2013, 2016, 2014 55899 55899 2013, 2014, 2009 2015, 2013, 2016, 2014, 2019 2019 92477 92477 2014 2013, 2019, 2016, 2015, 2014 2019 TRIB.BUCKENHAM STR. D/S BANHAM POULTRY 44M50 2010, 2009, 2011