Yare (Tiffey to Wensum) Water Body
Moderate ecological status
Get Yare (Tiffey to Wensum) data
Attributes
- Water Body IDGB105034051281
- Water Body TypeRiver
- Hydromorphological designationheavily modified
- NGRTG2298605314
- Catchment area52.053 km2
- Surveillance Water BodyNo
- Catchment area5205.348 ha
- Length25.679 km
Classifications
| Classification Item | 2019 |
|---|---|
| Ecological | Moderate |
| Biological quality elements | Moderate |
| Fish | High |
| Invertebrates | High |
| Macrophytes and Phytobenthos Combined | Moderate |
| Macrophytes Sub Element | Moderate |
| Physico-chemical quality elements | Moderate |
| Acid Neutralising Capacity | High |
| Ammonia (Phys-Chem) | High |
| Dissolved oxygen | Moderate |
| Phosphate | Good |
| Temperature | Good |
| 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 | High |
| 2,4-dichlorophenoxyacetic acid | High |
| Carbendazim | High |
| Copper | High |
| Diazinon | High |
| Dimethoate | High |
| Linuron | High |
| Mecoprop | High |
| 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 |
| Atrazine | Good |
| Chlorfenvinphos | Good |
| Chlorpyrifos | Good |
| Cypermethrin (Priority) | Good |
| Diuron | Good |
| Fluoranthene | Good |
| Isoproturon | Good |
| Simazine | Good |
| Terbutryn | 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 | Flow | Groundwater abstraction | Industry | Hydrological Regime | Details |
| RNAG | Flow | Surface water abstraction | Water Industry | Hydrological Regime | Details |
| RNAG | Flow | Groundwater abstraction | Water Industry | Hydrological Regime | 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 |
| RFD | Physical modification | Flood protection - other operational management | Local and Central Government | Macrophytes and Phytobenthos Combined | Details |
| RFD | Diffuse source | Poor nutrient management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Other (not in list, must add details in comments) | Agriculture and rural land management | Mitigation Measures Assessment | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
| RNAG | Flow | Surface water abstraction | Industry | Hydrological Regime | 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 | 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 | 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 | 0 | 0 |
Objectives
| Classification Item | Status | Year | Reasons |
|---|---|---|---|
| Ecological | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Biological quality elements | Good | 2015 | |
| Fish | Good | 2015 | |
| Invertebrates | Good | 2015 | |
| Macrophytes and Phytobenthos Combined | Good | 2015 | |
| Physico-chemical quality elements | Good | 2015 | |
| Acid Neutralising Capacity | 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 | 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 | |
| 2,4-dichlorophenoxyacetic acid | High | 2015 | |
| Carbendazim | High | 2015 | |
| Copper | High | 2015 | |
| Diazinon | High | 2015 | |
| Dimethoate | High | 2015 | |
| Linuron | High | 2015 | |
| Mecoprop | High | 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 | |
| Atrazine | Good | 2015 | |
| Chlorfenvinphos | Good | 2015 | |
| Chlorpyrifos | Good | 2015 | |
| Cypermethrin (Priority) | Good | 2015 | |
| Diuron | Good | 2015 | |
| Fluoranthene | Good | 2015 | |
| Isoproturon | Good | 2015 | |
| Simazine | Good | 2015 | |
| Terbutryn | Good | 2015 | |
| Other Pollutants | Does not require assessment | 2015 |
Protected areas
| PA Name | Id | Directive | More information |
|---|---|---|---|
| Norwich Crag and Gravels | G79 | Nitrates Directive | |
| Yare NVZ | S400 | Nitrates Directive | |
| River Tiffey & Yare | UKENRI89 | Urban Waste Water Treatment 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.