Piddle (Lower) Water Body
Moderate ecological status
Get Piddle (Lower) data
Attributes
- Water Body IDGB108044010080
- Water Body TypeRiver
- Hydromorphological designationnot designated artificial or heavily modified
- NGRSY7885494406
- Catchment area3778.841 ha
- Length27.31 km
- Catchment area37.788 km2
- Surveillance Water BodyYes
Classifications
| Classification Item | 2019 | 2022 |
|---|---|---|
| Ecological | Moderate | Moderate |
| Biological quality elements | Moderate | Moderate |
| Fish | Moderate | Moderate |
| Invertebrates | High | High |
| Macrophytes and Phytobenthos Combined | Moderate | Moderate |
| Macrophytes Sub Element | Moderate | Moderate |
| Phytobenthos Sub Element | Moderate | Moderate |
| Physico-chemical quality elements | High | High |
| Acid Neutralising Capacity | High | High |
| Ammonia (Phys-Chem) | High | High |
| Dissolved oxygen | High | High |
| Phosphate | High | High |
| Temperature | High | High |
| pH | High | High |
| Hydromorphological Supporting Elements | Supports good | Supports good |
| Hydrological Regime | Supports good | Supports good |
| Specific pollutants | High | High |
| Arsenic | High | High |
| Copper | High | High |
| Iron | 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 | |
| Cadmium and Its Compounds | Good | |
| Dioxins and dioxin-like compounds | 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 | |
| Priority substances | Good | Does not require assessment |
| Aclonifen | Good | |
| Alachlor | Good | |
| Bifenox | Good | |
| Cybutryne | Good | |
| Cypermethrin (Priority) | Good | |
| Dichlorvos (Priority) | Good | |
| Fluoranthene | Good | |
| Lead and Its Compounds | Good | |
| Nickel and Its Compounds | Good | |
| Terbutryn | Good | |
| Other Pollutants | Good | Does not require assessment |
| para - para DDT | Good |
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 |
| RFD | Suspect data | Not applicable | No sector responsible | Fish | Details |
| RNAG | Physical modification | Barriers - ecological discontinuity | Sector under investigation | Fish | Details |
| RNAG | Flow | No further action (Flow is below the EFI but NOT causing an ecological failure) | No sector responsible | Hydrological Regime | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Fish | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Mercury and Its Compounds | Details |
| RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Other pressures | Ecological recovery time - surface waters | Other | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Point source | Trade/Industry discharge | Industry | Macrophytes and Phytobenthos Combined | 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 | 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 | 1 | 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 | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| Fish | Good | 2015 | |
| Invertebrates | Good | 2015 | |
| Macrophytes and Phytobenthos Combined | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens |
| 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 | |
| Arsenic | High | 2015 | |
| Copper | High | 2015 | |
| Iron | High | 2015 | |
| Manganese | High | 2015 | |
| Pendimethalin | High | 2015 | |
| Zinc | High | 2015 | |
| Chemical | Good | 2063 | Disproportionately expensive: Disproportionate burdens; Natural conditions: Chemical status recovery time; Technically infeasible: Cause of adverse impact unknown |
| 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 | |
| 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 | |
| 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 | |
| Priority substances | Good | 2015 | |
| Aclonifen | Good | 2015 | |
| Alachlor | Good | 2015 | |
| Bifenox | Good | 2015 | |
| Cybutryne | Good | 2015 | |
| Cypermethrin (Priority) | Good | 2015 | |
| Dichlorvos (Priority) | Good | 2015 | |
| Fluoranthene | Good | 2015 | |
| Lead and Its Compounds | Good | 2015 | |
| Nickel and Its Compounds | Good | 2015 | |
| Terbutryn | Good | 2015 | |
| Other Pollutants | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens; Technically infeasible: Cause of adverse impact unknown |
| Aldrin, Dieldrin, Endrin & Isodrin | Good | 2027 - Low confidence | Disproportionately expensive: Disproportionate burdens; Technically infeasible: Cause of adverse impact unknown |
| para - para DDT | Good | 2015 |
Protected areas
| PA Name | Id | Directive | More information |
|---|---|---|---|
| South Wessex | G151 | Nitrates Directive | |
| Poole Harbour | ET1 | Nitrates Directive | |
| Poole Harbour | UK11054 | Ramsar Site | Natural England |
| Dorset Heaths | UK0019857 | Special Area of Conservation | Natural England |
| Dorset Heathlands | UK11021 | Ramsar Site | Natural England |
| Poole Harbour West | UKSW54 | Shellfish Water Directive | |
| Poole Harbour and Holes Bay | UKENCA117 | 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.