Hockley Brook Catchment (trib of Rea) Water Body
Moderate ecological status
Get Hockley Brook Catchment (trib of Rea) data
Attributes
- Water Body IDGB104028042640
- Water Body TypeRiver
- Hydromorphological designationheavily modified
- NGRSP0569488626
- Catchment area26.609 km2
- Surveillance Water BodyNo
- Length8.423 km
- Catchment area2660.89 ha
Classifications
Classification Item | 2019 |
---|---|
Ecological | Moderate |
Physico-chemical quality elements | Moderate |
Ammonia (Phys-Chem) | Bad |
Dissolved oxygen | Poor |
Phosphate | Poor |
Temperature | High |
pH | High |
Hydromorphological Supporting Elements | Supports good |
Hydrological Regime | Does not support good |
Supporting elements (Surface Water) | Moderate |
Mitigation Measures Assessment | Moderate or less |
Specific pollutants | Moderate |
Copper | High |
Iron | High |
Manganese | High |
Triclosan | High |
Zinc | Moderate |
Chemical | Fail |
Priority hazardous substances | Fail |
Benzo(a)pyrene | Good |
Benzo(b)fluoranthene | Good |
Benzo(g-h-i)perylene | Good |
Benzo(k)fluoranthene | Good |
Cadmium and Its Compounds | 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) | Fail |
Polybrominated diphenyl ethers (PBDE) | Fail |
Priority substances | Good |
Cypermethrin (Priority) | Good |
Fluoranthene | Good |
Lead and Its Compounds | Good |
Nickel and Its Compounds | Good |
Other Pollutants | Does not require assessment |
Investigations into classification status
Classification Element | Cycle | Year | Status | Outcome |
---|---|---|---|---|
Hydrological Regime | 2 | 2014 | Does Not Support Good | |
Dissolved oxygen | 2 | 2014 | Bad | Quite 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 | 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 |
RNAG | Point source | Trade/Industry discharge | Industry | Zinc | 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 | Diffuse source | Contaminated land | Urban and transport | Zinc | Details |
RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Mercury and Its Compounds | Details |
RNAG | Flow | Groundwater abstraction | Water Industry | Hydrological Regime | Details |
RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Ammonia (Phys-Chem) | Details |
RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Ammonia (Phys-Chem) | Details |
RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | Phosphate | Details |
RNAG | Point source | Sewage discharge (intermittent) | Water Industry | Dissolved oxygen | Details |
RNAG | Diffuse source | Urbanisation - urban development | Urban and transport | 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 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Urban and transport | 1 | 0 | 4 | 0 | 0 | 0 | 0 |
Water Industry | 0 | 2 | 0 | 1 | 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 | 2 | 4 | 1 | 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 | |
Physico-chemical quality elements | Moderate | 2015 | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits |
Ammonia (Phys-Chem) | Bad | 2015 | Disproportionately expensive: Unfavourable balance of costs and benefits |
Dissolved oxygen | Poor | 2021 | Disproportionately expensive: Disproportionate burdens |
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 | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
Supporting elements (Surface Water) | Moderate | 2015 | Disproportionately expensive: Unfavourable balance of costs and benefits |
Mitigation Measures Assessment | Moderate or less | 2015 | Disproportionately expensive: Unfavourable balance of costs and benefits |
Specific pollutants | High | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
Copper | High | 2015 | |
Iron | High | 2015 | |
Manganese | High | 2015 | |
Triclosan | High | 2015 | |
Zinc | High | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
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(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 | |
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 | 2039 | Technically infeasible: No known technical solution is available |
Polybrominated diphenyl ethers (PBDE) | Good | 2063 | Natural conditions: Chemical status recovery time |
Priority substances | Good | 2015 | |
Cypermethrin (Priority) | Good | 2015 | |
Fluoranthene | Good | 2015 | |
Lead and Its Compounds | Good | 2015 | |
Nickel and Its Compounds | Good | 2015 | |
Other Pollutants | Does not require assessment | 2015 |
Protected areas
PA Name | Id | Directive | More information |
---|---|---|---|
River Trent (source to confluence with Derwent) | S308 | 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.