Main Drain (Ribble) Water Body Moderate ecological status
Get Main Drain (Ribble) data Attributes Water Body ID GB112071065651 Water Body Type River Hydromorphological designation heavily modified NGR SD3726030133 Catchment area 35.58 km2 Surveillance Water Body No Length 5.032 km Catchment area 3557.97 ha Classifications Classification Item 2019 Ecological Moderate Biological quality elements Bad Invertebrates Bad Macrophytes and Phytobenthos Combined Good Phytobenthos Sub Element Good Physico-chemical quality elements Moderate Ammonia (Phys-Chem) Moderate Dissolved oxygen Bad Phosphate Moderate Temperature High pH High Hydromorphological Supporting Elements Supports good Hydrological Regime Supports good Supporting elements (Surface Water) Moderate Mitigation Measures Assessment Moderate or less Specific pollutants High Triclosan High Chemical Fail Priority hazardous substances Fail Benzo(a)pyrene 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 Fail Nonylphenol Good 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 Classification Element Cycle Year Status Outcome Dissolved oxygen 2 2014 Bad Ammonia (Phys-Chem) 2 2014 Poor
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 Point source Sewage discharge (continuous) Domestic General Public Invertebrates Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Polybrominated diphenyl ethers (PBDE) Details RNAG Point source Sewage discharge (continuous) Domestic General Public Phosphate Details RNAG Physical modification Other (not in list, must add details in comments) Agriculture and rural land management Mitigation Measures Assessment Details RNAG Point source Sewage discharge (continuous) Domestic General Public Dissolved oxygen Details RNAG Point source Sewage discharge (continuous) Domestic General Public Ammonia (Phys-Chem) Details RNAG measures delivered to address reason, awaiting recovery Not applicable No sector responsible Mercury and Its Compounds Details RNAG Physical modification Other (not in list, must add details in comments) Local and Central Government Mitigation Measures Assessment 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 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 1 0 0 0 0 0 0 Domestic general public 0 4 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 2 4 0 0 0 0 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 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Macrophytes and Phytobenthos Combined Good 2015 Physico-chemical quality elements Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Ammonia (Phys-Chem) Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Dissolved oxygen Good 2027 - Low confidence 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) Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Mitigation Measures Assessment Good 2027 - Low confidence Disproportionately expensive: Disproportionate burdens Specific pollutants High 2015 Triclosan 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 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 2040 Natural conditions: Chemical status recovery time 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 Other Pollutants Does not require assessment 2015
Protected areas PA Name Id Directive More information Ribble & Alt Estuaries UK9005103 Special Protection Area Natural England Ribble & Alt Estuaries UK11057 Ramsar Site 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 MAIN DRAIN @ B5259 88009772 2015, 2016, 2019, 2014 2019 67584 67584 2014, 2015, 2016