Lymn / Steeping Water Body
Moderate ecological status
Get Lymn / Steeping data
Attributes
- Water Body IDGB105030062430
- Water Body TypeRiver
- Hydromorphological designationheavily modified
- NGRTF5473859160
- Length45.03 km
- Catchment area170.295 km2
- Surveillance Water BodyNo
- Catchment area17029.521 ha
Classifications
| Classification Item | 2019 |
|---|---|
| Ecological | Moderate |
| Biological quality elements | Moderate |
| Fish | Moderate |
| 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 | Moderate |
| 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 |
| Chlorothalonil | High |
| Chromium (VI) | High |
| Copper | High |
| Pendimethalin | High |
| Zinc | High |
| Chemical | Fail |
| Priority hazardous substances | Fail |
| Benzo(a)pyrene | 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 |
| Trifluralin (Priority hazardous) | Good |
| Priority substances | Good |
| Cypermethrin (Priority) | Good |
| Fluoranthene | Good |
| Lead and Its Compounds | Good |
| Nickel and Its Compounds | Good |
| Trichlorobenzenes | Good |
| Other Pollutants | Good |
| Aldrin, Dieldrin, Endrin & Isodrin | Good |
| 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 | Physical modification | Land drainage - operational management | Other | Fish | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Mercury and Its Compounds | Details |
| RNAG | Physical modification | Flood protection - structures | Local and Central Government | Temperature | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Dissolved oxygen | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Dissolved oxygen | Details |
| RNAG | Point source | Sewage discharge (continuous) | Water Industry | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Flood protection - structures | Local and Central Government | Dissolved oxygen | Details |
| RNAG | Diffuse source | Poor soil management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Physical modification | Other (not in list, must add details in comments) | Local and Central Government | Mitigation Measures Assessment | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Flow | No further action (Flow is below the EFI but NOT causing an ecological failure) | No sector responsible | Hydrological Regime | Details |
| RNAG | Physical modification | Other (not in list, must add details in comments) | Agriculture and rural land management | Mitigation Measures Assessment | Details |
| RNAG | Diffuse source | Poor Livestock Management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Diffuse source | Riparian/in-river activities (inc bankside erosion) | Agriculture and rural land management | Fish | Details |
| RNAG | Invasive non-native species | North american signal crayfish | No sector responsible | Macrophytes and Phytobenthos Combined | Details |
| RFD | Invasive non-native species | North american signal crayfish | No sector responsible | Fish | Details |
| RNAG | Diffuse source | Poor nutrient management | Agriculture and rural land management | Macrophytes and Phytobenthos Combined | Details |
| RNAG | Invasive non-native species | North american signal crayfish | No sector responsible | Fish | Details |
| RNAG | measures delivered to address reason, awaiting recovery | Not applicable | No sector responsible | Polybrominated diphenyl ethers (PBDE) | 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 | 5 | 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 | 2 | 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 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| No sector responsible | 0 | 0 | 0 | 0 | 2 | 0 | 0 |
| Sector under investigation | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 4 | 0 | 0 | 0 | 2 | 5 | 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 | 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 | |
| Chlorothalonil | High | 2015 | |
| Chromium (VI) | High | 2015 | |
| Copper | High | 2015 | |
| Pendimethalin | High | 2015 | |
| Zinc | 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 | |
| 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 |
| Trifluralin (Priority hazardous) | Good | 2015 | |
| Priority substances | Good | 2015 | |
| Cypermethrin (Priority) | Good | 2015 | |
| Fluoranthene | Good | 2015 | |
| Lead and Its Compounds | Good | 2015 | |
| Nickel and Its Compounds | Good | 2015 | |
| Trichlorobenzenes | Good | 2015 | |
| Other Pollutants | Good | 2015 | |
| Aldrin, Dieldrin, Endrin & Isodrin | Good | 2015 | |
| para - para DDT | Good | 2015 |
Protected areas
| PA Name | Id | Directive | More information |
|---|---|---|---|
| Lincolnshire Chalk | G80 | Nitrates Directive | |
| West Wash | UKSW4 | Shellfish Water Directive | |
| The Wash & North Norfolk Coast | UK0017075 | Special Area of Conservation | Natural England |
| The Wash | UK9008021 | Special Protection Area | Natural England |
| The Wash | UK11072 | Ramsar Site | Natural England |
| Lymn / Steeping NVZ | S376 | Nitrates Directive | |
| Witham Drains NVZ | S716 | Nitrates 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.