Upper Darent Water Body
Moderate ecological status
Get Upper Darent data
Attributes
- Water Body IDGB106040024221
- Water Body TypeRiver
- Hydromorphological designationnot designated artificial or heavily modified
- NGRTQ4808655420
- Catchment area100.384 km2
- Surveillance Water BodyNo
- Length14.23 km
- Catchment area10038.357 ha
Classifications
| Classification Item | 2019 |
|---|---|
| Ecological | Moderate |
| Biological quality elements | Moderate |
| Fish | Moderate |
| Invertebrates | High |
| Macrophytes and Phytobenthos Combined | Moderate |
| Macrophytes Sub Element | Moderate |
| Physico-chemical quality elements | Good |
| Ammonia (Phys-Chem) | High |
| Dissolved oxygen | High |
| Phosphate | Good |
| Temperature | High |
| pH | High |
| Hydromorphological Supporting Elements | Supports good |
| Hydrological Regime | Does not support good |
| Morphology | Supports good |
| Specific pollutants | High |
| Copper | High |
| Iron | High |
| Manganese | High |
| Zinc | High |
| Chemical | Fail |
| Priority hazardous substances | Fail |
| Anthracene | Good |
| Benzo(a)pyrene | 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 | Good |
| Perfluorooctane sulphonate (PFOS) | Good |
| 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 |
|---|---|---|---|---|
| Macrophytes and Phytobenthos Combined | 3 | 2019 | Moderate | |
| Macrophytes and Phytobenthos Combined | 2 | 2019 | Moderate | Certain there is not 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 | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Fish | Details |
| RNAG | Physical modification | Impoundment - u/s elevated water level | Industry | Fish | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Industry | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Water Industry | Fish | Details |
| RNAG | Physical modification | Impoundment - u/s elevated water level | Recreation | Fish | Details |
| RNAG | Natural | Natural conditions - other | No sector responsible | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Fish | Details |
| RNAG | Suspect data | Not applicable | No sector responsible | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Fish | Details |
| RNAG | Natural | Natural conditions - other | No sector responsible | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Water Industry | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Recreation | Fish | Details |
| RNAG | Physical modification | Impoundment - u/s elevated water level | Industry | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Urban and transport | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Industry | Fish | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
| RNAG | Flow | Groundwater abstraction | Water Industry | Hydrological Regime | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Recreation | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Urban and transport | Fish | Details |
| RNAG | Diffuse source | Riparian/in-river activities (inc bankside erosion) | Agriculture and rural land management | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Agriculture and rural land management | Fish | Details |
| RNAG | Flow | Groundwater abstraction | Water Industry | Fish | 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 | 6 | 0 |
| Industry | 4 | 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 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Water Industry | 2 | 0 | 0 | 2 | 0 | 0 | 0 |
| Local & central government | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Domestic general public | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Recreation | 3 | 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 | 12 | 0 | 0 | 2 | 0 | 6 | 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 |
| Fish | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Invertebrates | Good | 2015 | |
| Macrophytes and Phytobenthos Combined | Good | 2021 | Disproportionately expensive: Disproportionate burdens |
| Physico-chemical quality elements | Good | 2015 | |
| Ammonia (Phys-Chem) | Good | 2015 | |
| Dissolved oxygen | Good | 2015 | |
| Phosphate | Good | 2015 | |
| 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) | Not assessed | 2015 | |
| Specific pollutants | High | 2015 | |
| Copper | High | 2015 | |
| Iron | High | 2015 | |
| Manganese | High | 2015 | |
| Zinc | High | 2015 | |
| Chemical | Good | 2063 | Natural conditions: Chemical status recovery time |
| Priority hazardous substances | Good | 2063 | Natural conditions: Chemical status recovery time |
| Anthracene | Good | 2015 | |
| Benzo(a)pyrene | 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 | 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 | |
| Lead and Its Compounds | Good | 2015 | |
| Nickel and Its Compounds | Good | 2015 | |
| Other Pollutants | Does not require assessment | 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.