Cheddar Reservoir Water Body Moderate ecological status
Get Cheddar Reservoir data Attributes Water Body ID GB30943348 Water Body Type Lake Hydromorphological designation artificial NGR ST4416453765 Altitude 12 m Mean depth 6.4 m Surveillance Water Body No Surface area 0.917 km2 Surface area 91.725 ha Catchment area 479.75 ha Classifications Classification Item 2019 2022 Ecological Moderate Moderate Biological quality elements Good Good Macrophytes and Phytobenthos Combined Macrophytes Sub Element Good Good Phytoplankton Good Good Physico-chemical quality elements Moderate Moderate Salinity High High Total Nitrogen Poor Poor Total Phosphorus High High Supporting elements (Surface Water) Good Good Expert Judgement Good Good Mitigation Measures Assessment Good Good Specific pollutants High High Copper High High 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 Fail Perfluorooctane sulphonate (PFOS) Good Polybrominated diphenyl ethers (PBDE) Fail Priority substances Good Does not require assessment 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 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 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 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 0 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 2015 Macrophytes and Phytobenthos Combined Not assessed 2015 Phytoplankton Good 2015 Physico-chemical quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Dissolved oxygen Good 2015 Salinity Good 2015 Total Nitrogen Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Total Phosphorus Good 2015 Hydromorphological Supporting Elements Not assessed 2015 Supporting elements (Surface Water) Good 2015 Expert Judgement Good 2015 Mitigation Measures Assessment Good 2015 Specific pollutants High 2015 Copper 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 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 Fluoranthene Good 2015 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information River Axe SWSGZ5004 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 CHEDDAR RES E7070250 2013, 2014, 2012, 2009 2015, 2019, 2013, 2016, 2014 2019, 2022 100522 100522 2009, 2014, 2012, 2013 2016, 2019, 2013, 2015, 2014 2019, 2022