Weaver (Dane to Frodsham) Water Body
Moderate ecological status
Get Weaver (Dane to Frodsham) data
Attributes
- Water Body IDGB112068060500
- Water Body TypeRiver
- Hydromorphological designationheavily modified
- NGRSJ6014975939
- Catchment area6127.649 ha
- Length29.847 km
- Catchment area61.276 km2
- Surveillance Water BodyYes
Classifications
| Classification Item | 2019 | 2022 |
|---|---|---|
| Ecological | Moderate | Moderate |
| Biological quality elements | Bad | Bad |
| Invertebrates | Bad | Bad |
| Macrophytes and Phytobenthos Combined | Good | Good |
| Macrophytes Sub Element | Poor | Poor |
| Phytobenthos Sub Element | Good | Good |
| Physico-chemical quality elements | Moderate | Moderate |
| Acid Neutralising Capacity | High | High |
| Ammonia (Phys-Chem) | Moderate | Moderate |
| Biochemical Oxygen Demand (BOD) | High | |
| Dissolved oxygen | High | Good |
| Phosphate | Poor | Moderate |
| Temperature | High | High |
| pH | High | High |
| Hydromorphological Supporting Elements | Supports good | Supports good |
| Hydrological Regime | Supports good | Supports good |
| Supporting elements (Surface Water) | Moderate | Moderate |
| Mitigation Measures Assessment | Moderate or less | Moderate or less |
| Specific pollutants | High | High |
| 2,4-dichlorophenol | High | High |
| 2,4-dichlorophenoxyacetic acid | High | High |
| Arsenic | High | High |
| Chlorothalonil | High | High |
| Chromium (VI) | High | High |
| Copper | High | High |
| Iron | High | High |
| Linuron | High | High |
| Manganese | High | High |
| Pendimethalin | High | High |
| Zinc | High | High |
| Chemical | Fail | Does not require assessment |
| Priority hazardous substances | Fail | Does not require assessment |
| 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 | |
| Endosulfan | Good | |
| Heptachlor and cis-Heptachlor epoxide | Good | |
| Hexabromocyclododecane (HBCDD) | Good | |
| Hexachlorobenzene | Good | |
| Hexachlorobutadiene | Good | |
| Hexachlorocyclohexane | Good | |
| Mercury and Its Compounds | Fail | |
| Perfluorooctane sulphonate (PFOS) | Good | |
| Polybrominated diphenyl ethers (PBDE) | Fail | |
| Quinoxyfen | Good | |
| Tributyltin Compounds | Good | |
| Priority substances | Fail | Does not require assessment |
| 1,2-dichloroethane | Good | |
| Aclonifen | Good | |
| Alachlor | Good | |
| Atrazine | Good | |
| Bifenox | Good | |
| Cybutryne | Good | |
| Cypermethrin (Priority) | Fail | |
| Dichlorvos (Priority) | Good | |
| Diuron | Good | |
| Fluoranthene | Good | |
| Lead and Its Compounds | Good | |
| Nickel and Its Compounds | Good | |
| Simazine | Good | |
| Terbutryn | Good | |
| Trichlorobenzenes | Good | |
| Trichloromethane | Good | |
| Other Pollutants | Good | Does not require assessment |
| Aldrin, Dieldrin, Endrin & Isodrin | Good | |
| Carbon Tetrachloride | Good | |
| Tetrachloroethylene | Good | |
| Trichloroethylene | Good | |
| para - para DDT | Good |
Investigations into classification status
| Classification Element | Cycle | Year | Status | Outcome |
|---|---|---|---|---|
| Macrophytes and Phytobenthos Combined | 2 | 2014 | Moderate | Quite certain there is a problem |
| Macrophytes and Phytobenthos Combined | 2 | 2016 | Good | 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) | Navigation | Mitigation Measures Assessment | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
| RNAG | Unknown (pending investigation) | Unknown (pending investigation) | Sector under investigation | Invertebrates | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Phosphate | 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 | Diffuse source | Urbanisation - urban development | Urban and transport | Phosphate | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Point source | Farm/site infrastructure | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
| RNAG | Physical modification | Inland boating and structures | Navigation | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Point source | Trade/Industry discharge | Industry | Ammonia (Phys-Chem) | Details |
| RNAG | Point source | Farm/site infrastructure | Agriculture and rural land management | Phosphate | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Ammonia (Phys-Chem) | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Phosphate | Details |
| RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Phosphate | 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 | 7 | 0 |
| Industry | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Mining and quarrying | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Navigation | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Urban and transport | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Water Industry | 0 | 1 | 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 | 1 | 1 | 0 | 0 | 7 | 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 |
| Invertebrates | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Macrophytes and Phytobenthos Combined | Good | 2015 | |
| Physico-chemical quality elements | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Acid Neutralising Capacity | Good | 2015 | |
| Ammonia (Phys-Chem) | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Dissolved oxygen | Good | 2015 | |
| Phosphate | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Temperature | Good | 2015 | |
| pH | Good | 2015 | |
| Hydromorphological Supporting Elements | Supports good | 2015 | |
| Hydrological Regime | Supports good | 2015 | |
| 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-dichlorophenol | High | 2015 | |
| 2,4-dichlorophenoxyacetic acid | High | 2015 | |
| Arsenic | High | 2015 | |
| Chlorothalonil | High | 2015 | |
| Chromium (VI) | High | 2015 | |
| Copper | High | 2015 | |
| Iron | High | 2015 | |
| Linuron | High | 2015 | |
| Manganese | High | 2015 | |
| Pendimethalin | High | 2015 | |
| Zinc | High | 2015 | |
| Chemical | Good | 2063 | Disproportionately expensive: Disproportionate burdens; Natural conditions: Chemical status recovery time |
| Priority hazardous substances | Good | 2063 | Natural conditions: Chemical status recovery time |
| Benzo (b) and (k) fluoranthene | Good | 2015 | |
| Benzo (ghi) perelyene and indeno (123-cd) pyrene | Good | 2015 | |
| 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 | |
| Endosulfan | Good | 2015 | |
| Heptachlor and cis-Heptachlor epoxide | Good | 2015 | |
| Hexabromocyclododecane (HBCDD) | Good | 2015 | |
| Hexachlorobenzene | Good | 2015 | |
| Hexachlorobutadiene | Good | 2015 | |
| Hexachlorocyclohexane | 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 |
| Quinoxyfen | Good | 2015 | |
| Tributyltin Compounds | Good | 2015 | |
| Priority substances | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| 1,2-dichloroethane | Good | 2015 | |
| Aclonifen | Good | 2015 | |
| Alachlor | Good | 2015 | |
| Atrazine | Good | 2015 | |
| Bifenox | Good | 2015 | |
| Cybutryne | Good | 2015 | |
| Cypermethrin (Priority) | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Dichlorvos (Priority) | Good | 2015 | |
| Diuron | Good | 2015 | |
| Fluoranthene | Good | 2015 | |
| Lead and Its Compounds | Good | 2015 | |
| Nickel and Its Compounds | Good | 2015 | |
| Simazine | Good | 2015 | |
| Terbutryn | Good | 2015 | |
| Trichlorobenzenes | Good | 2015 | |
| Trichloromethane | Good | 2015 | |
| Other Pollutants | Good | 2015 | |
| Aldrin, Dieldrin, Endrin & Isodrin | Good | 2015 | |
| Carbon Tetrachloride | Good | 2015 | |
| Tetrachloroethylene | Good | 2015 | |
| Trichloroethylene | Good | 2015 | |
| para - para DDT | Good | 2015 |
Protected areas
| PA Name | Id | Directive | More information |
|---|---|---|---|
| River Weaver (Dane to Frodsham) NVZ | S636 | Nitrates Directive | |
| River Dane | UKENRI143 | Urban Waste Water Treatment Directive | |
| River Weaver | UKENRI155 | 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.