West Okement Water Body
Poor ecological status
Get West Okement data
Attributes
- Water Body IDGB108050008080
- Water Body TypeRiver
- Hydromorphological designationnot designated artificial or heavily modified
- NGRSX5751293992
- Catchment area3174.75 ha
- Length21.13 km
- Catchment area31.748 km2
- Surveillance Water BodyNo
Classifications
| Classification Item | 2013 | 2014 | 2015 | 2016 | 2019 |
|---|---|---|---|---|---|
| Ecological | Moderate | Moderate | Good | Moderate | Poor |
| Biological quality elements | Good | Good | Good | Poor | |
| Fish | Poor | ||||
| Invertebrates | Good | Good | Good | Good | |
| Physico-chemical quality elements | Moderate | Moderate | High | High | High |
| Acid Neutralising Capacity | High | High | High | ||
| Ammonia (Phys-Chem) | High | High | High | High | High |
| Dissolved oxygen | High | High | High | High | High |
| Phosphate | High | High | High | ||
| Temperature | High | High | High | High | High |
| pH | Moderate | Moderate | High | High | High |
| Hydromorphological Supporting Elements | Supports good | Supports good | Supports good | Supports good | Supports good |
| Hydrological Regime | Does not support good | Does not support good | Does not support good | Supports good | Supports good |
| Morphology | Supports good | Supports good | Supports good | Supports good | Supports good |
| Specific pollutants | Moderate | Moderate | High | Moderate | High |
| Copper | Moderate | Moderate | High | High | High |
| Iron | High | High | |||
| Manganese | High | High | |||
| Triclosan | High | High | |||
| Zinc | Moderate | Moderate | High | Moderate | High |
| Chemical | Fail | Fail | Fail | Fail | Fail |
| Priority hazardous substances | Fail | Fail | Good | Good | Fail |
| Benzo(a)pyrene | Good | ||||
| Cadmium and Its Compounds | Fail | Fail | Good | Good | Good |
| Di(2-ethylhexyl)phthalate (Priority hazardous) | Good | 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 | ||||
| Nonylphenol | Good | Good | |||
| Perfluorooctane sulphonate (PFOS) | Good | ||||
| Polybrominated diphenyl ethers (PBDE) | Fail | ||||
| Tributyltin Compounds | Good | Good | |||
| Priority substances | Fail | Fail | Fail | Fail | Fail |
| Cypermethrin (Priority) | Good | ||||
| Fluoranthene | Good | ||||
| Lead and Its Compounds | Good | Good | Good | Good | Good |
| Nickel and Its Compounds | Fail | Fail | Fail | Fail | Fail |
| Other Pollutants | Does not require assessment | Does not require assessment | Does not require assessment | Does not require assessment | 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 | Abandoned mine | Mining and quarrying | Nickel and Its Compounds | Details |
| RNAG | Natural | Natural mineralisation | No sector responsible | Nickel and Its Compounds | Details |
| RNAG | Point source | Trade/Industry discharge | Mining and quarrying | Nickel and Its Compounds | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Mercury and Its Compounds | 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 | 0 | 0 |
| Industry | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Mining and quarrying | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| 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 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
Objectives
| Classification Item | Status | Year | Reasons |
|---|---|---|---|
| Ecological | Good | 2027 - Low confidence | Technically infeasible: Cause of adverse impact unknown |
| Biological quality elements | Good | 2027 - Low confidence | Technically infeasible: Cause of adverse impact unknown |
| Fish | Good | 2027 - Low confidence | Technically infeasible: Cause of adverse impact unknown |
| Invertebrates | 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 | Supports good | 2021 | 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 | Disproportionately expensive: Disproportionate burdens; Natural conditions: Chemical status recovery time |
| Priority hazardous substances | Good | 2063 | Natural conditions: Chemical status recovery time |
| 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 | 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 | 2033 | Disproportionately expensive: Disproportionate burdens |
| Cypermethrin (Priority) | Good | 2015 | |
| Fluoranthene | Good | 2015 | |
| Lead and Its Compounds | Good | 2015 | |
| Nickel and Its Compounds | Good | 2033 | Disproportionately expensive: Disproportionate burdens |
| Other Pollutants | Does not require assessment | 2015 |
Protected areas
| PA Name | Id | Directive | More information |
|---|---|---|---|
| Dartmoor | UK0012929 | Special Area of Conservation | Natural England |
| Meldon Reservoir | SWSGZ5103 | Safeguard Zone | |
| West Okement | UKGB108050008080 | Drinking Water Protected Area |
Monitoring sites which have been used to classify this water body
Shows which sites were used for classification for which years within each cycle.