Lee Upper Management Catchment

About

Rivers within the Upper Lee catchment extend to over 320km. Their distribution means not one of the catchments 700,000 residents is further than 5km from a river. This extensive blue infrastructure is recognised in the areas status as a locally determined Nature Improvement Area. Here local groups have committed to significant landscape scale environmental improvement. Across the catchment, the character of the rivers varies considerably. In urban areas like Luton, rivers typically run in man-made channels and culverts, only making an appearance as they flow through parks and green spaces. Some towns like Harlow, Hertford and Bishops Stortford, have historic navigations running near or through them, providing a valued link between town and country. In rural areas, picturesque rivers, including rare chalk rivers, wind their way through small settlements. As a result, the way the rivers are perceived by local people, and the value they place in them, varies widely across the catchment. The catchment is an area of water stress, where average daily water use is amongst the highest in the country. Groundwater and rivers supply water for local people, and 90% of water abstracted is used for this purpose. This groundwater abstraction impacts on the amount of water available in the environment. In particular, this impacts the rivers in the catchment, which depend on an adequate supply of groundwater. River users, businesses and organisations are working together to identify ways of reducing abstraction, using water more wisely and, improving the quantity and quality of water in the environment.

Culvert cleaning near the River Beane at Waterford Marsh, Hertfordshire

Classifications data for Lee Upper Management Catchment

Number of water bodies

The number of water bodies in the river basin district. It shows whether these are natural, artificial (such as canals and reservoirs) or have been modified ('heavily modified') for particular uses.

Water body categoriesNaturalArtificialHeavily modifiedTotal
River, canals and surface water transfers190423
Lake0000
Coastal0000
Estuarine0000
Groundwater0000
Total190423

Ecological status for surface waters

Table summarises the current ecological status of surface water bodies. Water bodies are classified as being at high, good, moderate, poor or bad ecological status or potential.

Ecological status or potentialBadPoorModerateGoodHighTotal
Number of water bodies19130023
Number of water body elements3272526185266

Chemical status for surface waters

Table summarises the current chemical status of water bodies. These are classified as being at good or fail.

Chemical statusFailGoodTotal
Number of water bodies23023
Number of water body elements44375419

Why do all water bodies have a chemical status of fail?

Quantitative status for groundwater

Table summarises the quantitative status of groundwater water bodies. These are classified as being at good or poor.

Quantitative statusPoorGoodTotal
Number of water bodies000
Number of water body elements000

Chemical status for groundwater

Table summarises the chemical status of groundwater water bodies. These are classified as being at good or poor.

Chemical statusPoorGoodTotal
Number of water bodies000
Number of water body elements000

Challenges data for Lee Upper Management Catchment

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 issueChanges to the natural flow and level of waterInvasive non-native speciesPhysical modificationsPollution from abandoned minesPollution from rural areasPollution from towns, cities and transportPollution from waste water
Agriculture and rural land management001103600
Domestic general public0000000
Industry0000000
Local & central government0040000
Mining and quarrying0000000
Navigation0040000
No sector responsible0900000
Other0050030
Recreation0030000
Sector under investigation0000000
Urban and transport002100150
Waste treatment and disposal0000000
Water Industry200000023
Total209480361823

Objectives data for Lee Upper Management Catchment

Ecological status or potential objectives for surface water bodies

Table summarises the ecological status and ecological potential objectives set for water bodies in the river basin management plan. Each water body is only counted once in this table. Each water body objective consists of a target status and a date when it was, or is expected to be, met.

StatusBadPoorModerateGoodHighTotal
By 2015004105
By 202700117018
Total00518023

16 of the "by 2027" objectives are low confidence

Chemical status objectives for surface water bodies

Including those with less stringent objectives and extended deadlines

StatusFailGoodTotal
By 206302323
Total02323

0 of the "by 2027" objectives are low confidence

Quantitative status objectives for groundwater

Including those with less stringent objectives and extended deadlines

StatusPoor
GoodTotal
Total000

0 of the "by 2027" objectives are low confidence

Chemical status objectives for groundwater

Including those with less stringent objectives and extended deadlines

StatusPoor
GoodTotal
Total000

0 of the "by 2027" objectives are low confidence

Summary Statistics data for Lee Upper Management Catchment

Ecological status and potential

Summary statisticRivers, Canals and SWTsLakesEstuariesCoastalSurface Waters Combined
% of water bodies at good or better ecological status/potential0%0%
% of biological elements, phys-chem elements and specific pollutants at good or better status79%79%
% of water bodies with an objective of good ecological status/potential or better78%78%
% of biological elements, phys-chem elements and Specific Pollutants with an objective of good status or better97%97%

Chemical

Summary statisticRivers, Canals and SWTsLakesEstuariesCoastalSurface Waters Combined
% of water bodies at good chemical status0%0%
% of chemical elements at good status89%89%
% of water bodies at good chemical status without uPBT96%96%
% of chemical elements at good status without uPBTGreater than 99%Greater than 99%
% of water bodies with an objective of good chemical status100%100%
% of chemical elements with an objective of good100%100%
% of water bodies with an objective of good chemical status without uPBT100%100%
% of chemical elements with an objective of good without uPBTs100%100%