Mersey (upstream of Manchester Ship Canal) Water Body
Moderate ecological status
Get Mersey (upstream of Manchester Ship Canal) data
Attributes
- Water Body IDGB112069061030
- Water Body TypeRiver
- Hydromorphological designationheavily modified
- NGRSJ8401287950
- Catchment area54.524 km2
- Surveillance Water BodyNo
- Length34.992 km
- Catchment area5452.41 ha
Classifications
Classification Item | 2019 | 2022 |
---|---|---|
Ecological | Moderate | Moderate |
Biological quality elements | ||
Macrophytes and Phytobenthos Combined | ||
Macrophytes Sub Element | Good | Good |
Physico-chemical quality elements | Moderate | Moderate |
Acid Neutralising Capacity | High | High |
Ammonia (Phys-Chem) | Good | Good |
Biochemical Oxygen Demand (BOD) | High | |
Dissolved oxygen | High | High |
Phosphate | Poor | Poor |
Temperature | High | High |
pH | High | High |
Hydromorphological Supporting Elements | Supports good | Supports good |
Hydrological Regime | Supports good | Supports good |
Supporting elements (Surface Water) | Moderate | Moderate |
Mitigation Measures Assessment | Moderate or less | Moderate or less |
Specific pollutants | High | High |
Arsenic | High | High |
Chlorothalonil | High | High |
Copper | High | High |
Diazinon | High | High |
Dimethoate | High | High |
Iron | High | High |
Manganese | High | High |
Pendimethalin | High | High |
Zinc | High | High |
Chemical | Fail | Does not require assessment |
Priority hazardous substances | Fail | Does not require assessment |
Benzo(a)pyrene | Good | |
Benzo(b)fluoranthene | Fail | |
Benzo(g-h-i)perylene | Fail | |
Benzo(k)fluoranthene | Fail | |
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 | |
Hexachlorocyclohexane | Good | |
Mercury and Its Compounds | Fail | |
Pentachlorobenzene | Good | |
Perfluorooctane sulphonate (PFOS) | Fail | |
Polybrominated diphenyl ethers (PBDE) | Fail | |
Quinoxyfen | Good | |
Tributyltin Compounds | Good | |
Priority substances | Fail | Does not require assessment |
Aclonifen | Good | |
Alachlor | Good | |
Bifenox | Good | |
Cybutryne | Good | |
Cypermethrin (Priority) | Fail | |
Dichlorvos (Priority) | Good | |
Fluoranthene | Good | |
Lead and Its Compounds | Good | |
Nickel and Its Compounds | Good | |
Pentachlorophenol | Good | |
Terbutryn | Good | |
Other Pollutants | Does not require assessment | Does not require assessment |
Investigations into classification status
Classification Element | Cycle | Year | Status | Outcome |
---|---|---|---|---|
Biochemical Oxygen Demand (BOD) | 2 | 2015 | Good | Very certain 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 | Unknown (pending investigation) | Unknown (pending investigation) | Sector under investigation | Perfluorooctane sulphonate (PFOS) | Details |
RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Phosphate | Details |
RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Phosphate | Details |
RNAG | Diffuse source | Riparian/in-river activities (inc bankside erosion) | Agriculture and rural land management | Phosphate | Details |
RNAG | Diffuse source | Poor pesticide management | Agriculture and rural land management | Phosphate | Details |
RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Phosphate | Details |
RNAG | Unknown (pending investigation) | Unknown (pending investigation) | Sector under investigation | Benzo(k)fluoranthene | Details |
RNAG | Point source | Sewage discharge (continuous) | Water Industry | Phosphate | Details |
RNAG | Unknown (pending investigation) | Unknown (pending investigation) | Sector under investigation | Benzo(g-h-i)perylene | Details |
RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Phosphate | Details |
RNAG | Unknown (pending investigation) | Unknown (pending investigation) | Sector under investigation | Benzo(b)fluoranthene | 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) | Urban and transport | Mitigation Measures Assessment | 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 | 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 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Water Industry | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
Local & central government | 1 | 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 | 2 | 1 | 0 | 0 | 0 | 0 | 0 |
Objectives
Classification Item | Status | Year | Reasons |
---|---|---|---|
Ecological | Moderate | 2015 | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits |
Biological quality elements | Not assessed | 2015 | Disproportionately expensive: Disproportionate burdens |
Macrophytes and Phytobenthos Combined | Not assessed | 2015 | Disproportionately expensive: Disproportionate burdens |
Physico-chemical quality elements | Moderate | 2015 | Disproportionately expensive: Unfavourable balance of costs and benefits |
Acid Neutralising Capacity | Good | 2015 | |
Ammonia (Phys-Chem) | Good | 2015 | |
Dissolved oxygen | Good | 2015 | |
Phosphate | Poor | 2015 | Disproportionately expensive: Unfavourable balance of costs and benefits |
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 | |
Arsenic | High | 2015 | |
Chlorothalonil | High | 2015 | |
Copper | High | 2015 | |
Diazinon | High | 2015 | |
Dimethoate | High | 2015 | |
Iron | High | 2015 | |
Manganese | High | 2015 | |
Pendimethalin | High | 2015 | |
Triclosan | High | 2015 | |
Zinc | High | 2015 | |
Chemical | Good | 2063 | Disproportionately expensive: Disproportionate burdens; Natural conditions: Chemical status recovery time; Technically infeasible: No known technical solution is available |
Priority hazardous substances | Good | 2063 | Natural conditions: Chemical status recovery time; Technically infeasible: No known technical solution is available |
Benzo (b) and (k) fluoranthene | Good | 2015 | |
Benzo (ghi) perelyene and indeno (123-cd) pyrene | Good | 2015 | |
Benzo(a)pyrene | Good | 2015 | |
Benzo(b)fluoranthene | Good | 2033 | Technically infeasible: No known technical solution is available |
Benzo(g-h-i)perylene | Good | 2033 | Technically infeasible: No known technical solution is available |
Benzo(k)fluoranthene | Good | 2033 | Technically infeasible: No known technical solution is available |
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 | |
Hexachlorocyclohexane | Good | 2015 | |
Mercury and Its Compounds | Good | 2040 | Natural conditions: Chemical status recovery time |
Pentachlorobenzene | Good | 2015 | |
Perfluorooctane sulphonate (PFOS) | Good | 2039 | Technically infeasible: No known technical solution is available |
Polybrominated diphenyl ethers (PBDE) | Good | 2063 | Natural conditions: Chemical status recovery time |
Quinoxyfen | Good | 2015 | |
Tributyltin Compounds | Good | 2015 | |
Priority substances | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
Aclonifen | Good | 2015 | |
Alachlor | Good | 2015 | |
Bifenox | Good | 2015 | |
Cybutryne | Good | 2015 | |
Cypermethrin (Priority) | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
Dichlorvos (Priority) | Good | 2015 | |
Fluoranthene | Good | 2015 | |
Lead and Its Compounds | Good | 2015 | |
Nickel and Its Compounds | Good | 2015 | |
Pentachlorophenol | Good | 2015 | |
Terbutryn | Good | 2015 | |
Other Pollutants | Good | 2015 | |
Aldrin, Dieldrin, Endrin & Isodrin | Good | 2015 | |
para - para DDT | Good | 2015 |
Protected areas
No data to show
Monitoring sites which have been used to classify this water body
Shows which sites were used for classification for which years within each cycle.