Lee (Tottenham Locks to Bow Locks/Three Mills Locks) Water Body
Bad ecological status
Get Lee (Tottenham Locks to Bow Locks/Three Mills Locks) data
Attributes
- Water Body IDGB106038077852
- Water Body TypeRiver
- Hydromorphological designationheavily modified
- NGRTQ3644887980
- Catchment area45.185 km2
- Surveillance Water BodyNo
- Length19.438 km
- Catchment area4518.477 ha
Classifications
| Classification Item | 2019 | 2022 |
|---|---|---|
| Ecological | Bad | Bad |
| Biological quality elements | Bad | Bad |
| Fish | Bad | Bad |
| Invertebrates | Moderate | Good |
| Macrophytes and Phytobenthos Combined | Poor | Moderate |
| Macrophytes Sub Element | Poor | Moderate |
| Physico-chemical quality elements | Moderate | Moderate |
| Acid Neutralising Capacity | High | High |
| Ammonia (Phys-Chem) | Moderate | High |
| Biochemical Oxygen Demand (BOD) | Good | High |
| Dissolved oxygen | Moderate | Good |
| Phosphate | Poor | Poor |
| Temperature | High | High |
| pH | High | High |
| Hydromorphological Supporting Elements | Supports good | Supports good |
| Hydrological Regime | Does not support good | Does not support good |
| Supporting elements (Surface Water) | Moderate | Moderate |
| Mitigation Measures Assessment | Moderate or less | Moderate or less |
| Specific pollutants | High | High |
| Arsenic | High | High |
| Copper | High | High |
| Iron | High | High |
| Manganese | High | High |
| Pendimethalin | High | High |
| Triclosan | 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 | Good | |
| Benzo(g-h-i)perylene | Good | |
| Benzo(k)fluoranthene | 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 | |
| Hexachlorocyclohexane | Good | |
| Mercury and Its Compounds | Good | |
| Nonylphenol | Good | |
| Perfluorooctane sulphonate (PFOS) | Fail | |
| Polybrominated diphenyl ethers (PBDE) | Fail | |
| Quinoxyfen | Good | |
| Tributyltin Compounds | Good | |
| Trifluralin (Priority hazardous) | Good | |
| Priority substances | Good | Does not require assessment |
| 1,2-dichloroethane | Good | |
| Aclonifen | Good | |
| Alachlor | Good | |
| Atrazine | Good | |
| Bifenox | Good | |
| Cybutryne | Good | |
| Cypermethrin (Priority) | Good | |
| Dichlorvos (Priority) | Good | |
| Fluoranthene | Good | |
| Lead and Its Compounds | Good | |
| Nickel and Its Compounds | Good | |
| Pentachlorophenol | Good | |
| Simazine | Good | |
| Terbutryn | Good | |
| Trichlorobenzenes | Good | |
| Trichloromethane | Good | |
| Other Pollutants | Good | Does not require assessment |
| Aldrin, Dieldrin, Endrin & Isodrin | Good | |
| Carbon Tetrachloride | Good | |
| DDT Total | Good | |
| Tetrachloroethylene | Good | |
| Trichloroethylene | Good | |
| para - para DDT | Good |
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 | Physical modification | Flood protection - structures | Urban and transport | Invertebrates | Details |
| RNAG | Invasive non-native species | Floating pennywort | No sector responsible | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Inland boating and structures | Navigation | Fish | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Urbanisation - urban development | Urban and transport | Fish | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Flood protection - structures | Urban and transport | Fish | Details |
| RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Macrophytes and Phytobenthos Combined | Details |
| 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 | Physical modification | Inland boating and structures | Navigation | Invertebrates | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Fish | Details |
| RNAG | Physical modification | Inland boating and structures | Navigation | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Flow | Surface water abstraction | Water Industry | Invertebrates | Details |
| RNAG | Diffuse source | Contaminated water body bed sediments | Other | Tributyltin Compounds | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Dissolved oxygen | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Invertebrates | Details |
| RNAG | Point source | Use of restricted substance | Navigation | Tributyltin Compounds | Details |
| RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Dissolved oxygen | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Invertebrates | Details |
| RNAG | Point source | Incidents | Sector under investigation | Fluoranthene | Details |
| RNAG | Physical modification | Urbanisation - urban development | Urban and transport | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Urbanisation - urban development | Urban and transport | Invertebrates | Details |
| RNAG | Physical modification | Flood protection - structures | Urban and transport | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Other (not in list, must add details in comments) | Urban and transport | Mitigation Measures Assessment | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Dissolved oxygen | Details |
| RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Invertebrates | Details |
| RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Fluoranthene | Details |
| RNAG | Physical modification | Other (not in list, must add details in comments) | Local and Central Government | Mitigation Measures Assessment | Details |
| RNAG | Physical modification | Inland boating and structures | Navigation | Dissolved oxygen | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Invertebrates | Details |
| RNAG | Diffuse source | Contaminated water body bed sediments | Urban and transport | Fluoranthene | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Ammonia (Phys-Chem) | Details |
| RNAG | Flow | Surface water abstraction | Water Industry | Fish | Details |
| RNAG | Physical modification | Other (not in list, must add details in comments) | Recreation | Mitigation Measures Assessment | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Phosphate | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Ammonia (Phys-Chem) | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Fish | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Phosphate | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Ammonia (Phys-Chem) | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Fish | Details |
| RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Phosphate | Details |
| RNAG | Flow | Surface water abstraction | Water Industry | Hydrological Regime | Details |
| RNAG | Point source | Misconnections | Domestic General Public | Fish | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Phosphate | Details |
| RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Dissolved oxygen | 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 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Urban and transport | 5 | 0 | 2 | 0 | 0 | 0 | 0 |
| Water Industry | 0 | 6 | 0 | 1 | 0 | 0 | 0 |
| Local & central government | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Domestic general public | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
| Recreation | 1 | 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 | 1 | 0 | 0 |
| Sector under investigation | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 9 | 6 | 6 | 1 | 1 | 0 | 0 |
Objectives
| Classification Item | Status | Year | Reasons |
|---|---|---|---|
| Ecological | Poor | 2021 | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits; Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use; Technically infeasible: No known technical solution is available |
| Biological quality elements | Poor | 2021 | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits; Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use; Technically infeasible: No known technical solution is available |
| Fish | Moderate | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens; Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use |
| Invertebrates | Moderate | 2015 | Good status prevented by A/HMWB designated use: Action to get biological element to good would have significant adverse impact on use |
| Macrophytes and Phytobenthos Combined | Poor | 2021 | Disproportionately expensive: Unfavourable balance of costs and benefits; Technically infeasible: No known technical solution is available |
| Physico-chemical quality elements | Moderate | 2015 | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits; Technically infeasible: No known technical solution is available |
| Acid Neutralising Capacity | Good | 2015 | |
| Ammonia (Phys-Chem) | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Dissolved oxygen | Moderate | 2021 | Technically infeasible: No known technical solution is available |
| Phosphate | Poor | 2021 | Disproportionately expensive: Unfavourable balance of costs and benefits; Technically infeasible: No known technical solution is available |
| 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) | 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 | |
| Copper | High | 2015 | |
| Iron | High | 2015 | |
| Manganese | High | 2015 | |
| Pendimethalin | High | 2015 | |
| Triclosan | High | 2015 | |
| Zinc | High | 2015 | |
| Chemical | Good | 2063 | 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 | 2015 | |
| Benzo(g-h-i)perylene | Good | 2015 | |
| Benzo(k)fluoranthene | Good | 2015 | |
| Cadmium and Its Compounds | Good | 2015 | |
| Di(2-ethylhexyl)phthalate (Priority hazardous) | Good | 2015 | |
| Dioxins and dioxin-like compounds | Good | 2015 | |
| Endosulfan | 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 | 2015 | |
| Nonylphenol | 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 | |
| Trifluralin (Priority hazardous) | Good | 2015 | |
| Priority substances | Good | 2015 | |
| 1,2-dichloroethane | Good | 2015 | |
| Aclonifen | Good | 2015 | |
| Alachlor | Good | 2015 | |
| Atrazine | Good | 2015 | |
| Bifenox | Good | 2015 | |
| Cybutryne | Good | 2015 | |
| Cypermethrin (Priority) | Good | 2015 | |
| Dichlorvos (Priority) | Good | 2015 | |
| Fluoranthene | Good | 2015 | |
| Lead and Its Compounds | Good | 2015 | |
| Nickel and Its Compounds | Good | 2015 | |
| Pentachlorophenol | Good | 2015 | |
| Simazine | Good | 2015 | |
| Terbutryn | Good | 2015 | |
| Trichlorobenzenes | Good | 2015 | |
| Trichloromethane | Good | 2015 | |
| Other Pollutants | Good | 2015 | |
| Aldrin, Dieldrin, Endrin & Isodrin | Good | 2015 | |
| Carbon Tetrachloride | Good | 2015 | |
| DDT Total | Good | 2015 | |
| Tetrachloroethylene | Good | 2015 | |
| Trichloroethylene | Good | 2015 | |
| para - para DDT | Good | 2015 |
Protected areas
| PA Name | Id | Directive | More information |
|---|---|---|---|
| LEE NVZ | S443 | Nitrates Directive | |
| Lea Navigation & River Lee | UKENRI59 | Urban Waste Water Treatment Directive | |
| Lee Valley | UK9012111 | Special Protection Area | Natural England |
| Lee Valley | UK11034 | 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.