Derry Brook Water Body
Bad ecological status
Get Derry Brook data
Attributes
- Water Body IDGB106039023620
- Water Body TypeRiver
- Hydromorphological designationnot designated artificial or heavily modified
- NGRSU0377990154
- Catchment area15.789 km2
- Surveillance Water BodyNo
- Catchment area1578.88 ha
- Length8.573 km
Classifications
Classification Item | 2019 |
---|---|
Ecological | Bad |
Biological quality elements | Bad |
Invertebrates | Bad |
Macrophytes and Phytobenthos Combined | Moderate |
Macrophytes Sub Element | Moderate |
Physico-chemical quality elements | Moderate |
Ammonia (Phys-Chem) | Poor |
Dissolved oxygen | Bad |
Phosphate | Poor |
Temperature | High |
pH | High |
Hydromorphological Supporting Elements | Supports good |
Hydrological Regime | High |
Morphology | Supports good |
Chemical | Fail |
Priority hazardous substances | Fail |
Benzo(a)pyrene | 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 |
Perfluorooctane sulphonate (PFOS) | Good |
Polybrominated diphenyl ethers (PBDE) | Fail |
Priority substances | Good |
Cypermethrin (Priority) | Good |
Fluoranthene | Good |
Other Pollutants | Does not require assessment |
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 | Diffuse source | Poor nutrient management | Agriculture and rural land management | Dissolved oxygen | Details |
RNAG | Natural | Drought | No sector responsible | Dissolved oxygen | Details |
RNAG | Physical modification | Land use - arable | Agriculture and rural land management | Invertebrates | Details |
RNAG | Diffuse source | Other (not in list, must add details in comments) | Agriculture and rural land management | Invertebrates | Details |
RNAG | Diffuse source | Other (not in list, must add details in comments) | Agriculture and rural land management | Invertebrates | Details |
RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Dissolved oxygen | Details |
RNAG | Diffuse source | Poor pesticide management | Agriculture and rural land management | Dissolved oxygen | Details |
RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Dissolved oxygen | Details |
RNAG | Diffuse source | Septic Tanks | Domestic General Public | Ammonia (Phys-Chem) | Details |
RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
RNAG | Diffuse source | Poor pesticide management | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
RNAG | Diffuse source | Septic Tanks | Domestic General Public | Phosphate | Details |
RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Phosphate | Details |
RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Mercury and Its Compounds | Details |
RNAG | Natural | Natural conditions - other | No sector responsible | Dissolved oxygen | Details |
RNAG | Diffuse source | Septic Tanks | Domestic General Public | 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 | 1 | 0 | 0 | 0 | 0 | 3 | 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 | 0 | 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 | 1 | 0 | 0 | 0 | 0 | 3 | 0 |
Objectives
Classification Item | Status | Year | Reasons |
---|---|---|---|
Ecological | Moderate | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits; Technically infeasible: Cause of adverse impact unknown |
Biological quality elements | Moderate | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits |
Invertebrates | Moderate | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
Macrophytes and Phytobenthos Combined | Moderate | 2015 | Disproportionately expensive: Unfavourable balance of costs and benefits |
Physico-chemical quality elements | Moderate | 2015 | Disproportionately expensive: Disproportionate burdens; Disproportionately expensive: Unfavourable balance of costs and benefits; Technically infeasible: Cause of adverse impact unknown |
Ammonia (Phys-Chem) | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens; Technically infeasible: Cause of adverse impact unknown |
Dissolved oxygen | Good | 2027 - Low confidence | 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 | 2015 | |
Supporting elements (Surface Water) | Not assessed | 2015 | |
Specific pollutants | Not assessed | 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 | |
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 |
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 |
---|---|---|---|
Upper Thames (Leach to Evenlode) | SWSGZ4012 | Safeguard Zone | |
Thames (Churn to Coln) NVZ | S457 | 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.