Gadder Water Body
Moderate ecological status
Get Gadder data
Attributes
- Water Body IDGB105033047880
- Water Body TypeRiver
- Hydromorphological designationnot designated artificial or heavily modified
- NGRTF7670902400
- Catchment area5394.786 ha
- Length10.389 km
- Catchment area53.948 km2
- Surveillance Water BodyNo
Classifications
Classification Item | 2019 |
---|---|
Ecological | Moderate |
Biological quality elements | Moderate |
Fish | Moderate |
Invertebrates | High |
Physico-chemical quality elements | Good |
Ammonia (Phys-Chem) | High |
Dissolved oxygen | Good |
Phosphate | Good |
Temperature | High |
pH | High |
Hydromorphological Supporting Elements | Supports good |
Hydrological Regime | Does not support good |
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 | Good |
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 | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
RNAG | Flow | Groundwater abstraction | Water Industry | Fish | Details |
RNAG | Physical modification | Land drainage | Agriculture and rural land management | Fish | Details |
RNAG | Physical modification | Barriers - ecological discontinuity | Agriculture and rural land management | Fish | Details |
RNAG | Physical modification | Land drainage | Agriculture and rural land management | Fish | Details |
RNAG | Flow | Surface water abstraction | Agriculture and rural land management | Hydrological Regime | Details |
RNAG | Flow | Groundwater abstraction | Agriculture and rural land management | Hydrological Regime | Details |
RNAG | Flow | Groundwater abstraction | Water Industry | Hydrological Regime | Details |
RNAG | Flow | Surface water abstraction | Agriculture and rural land management | Fish | Details |
RNAG | Flow | Groundwater abstraction | Agriculture and rural land management | 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 | 3 | 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 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Water Industry | 0 | 0 | 0 | 1 | 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 | 3 | 0 | 0 | 1 | 0 | 0 | 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 | |
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 | Disproportionately expensive: Disproportionate burdens |
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 | 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 | |
Other Pollutants | Does not require assessment | 2015 |
Protected areas
PA Name | Id | Directive | More information |
---|---|---|---|
Ely Ouse and Cut-off channel NVZ | S390 | Nitrates Directive | |
Norfolk Valley Fens | UK0012892 | Special Area of Conservation | Natural England |
Anglian Chalk | G71 | Nitrates Directive | |
Breckland | UK0019865 | Special Area of Conservation | 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.