Lee (from Luton Hoo Lakes to Hertford) sewage map and spill data
7 storm overflows listed in the 2025 annual return name this water. All are operated by Thames Water. Check the latest company report for each outlet below.
- 7
- Outlet records
- 68
- Spills in 2025
- 693
- Recorded hours
- 7
- Linked to a live feed
Annual figures describe the whole of 2025, not today.
Outlets on Lee (from Luton Hoo Lakes to Hertford)
Filter by the latest company report. The map follows the filters.
Filters apply to the map and list. Recent stops need a current report and a recorded stop time. They do not show whether water is safe.
Showing 7 of 7 outlets
Open full map- Brickendon STWCurrent status unknown
Thames Water · Harmonds Brook West Arm
2025 annual record:46spills518hours - East Hyde STWCurrent status unknown
Thames Water · The River Lee
2025 annual record:6spills27.8hours - Essendon SPSCurrent status unknown
Thames Water · Lea
2025 annual record:0spills0hours - Harpenden STWCurrent status unknown
Thames Water · Lee
2025 annual record:7spills68.8hours - Mill Green STWCurrent status unknown
Thames Water · Lee
2025 annual record:6spills58hours - West End (Essendon) SPSCurrent status unknown
Thames Water · Wood Hill Brook
2025 annual record:0spills0hours - Wheathampstead SPSCurrent status unknown
Thames Water · River Lee
2025 annual record:3spills20.9hours
No outlets match these filters.
Most recorded spills in 2025
The highest 2025 counts among these outlets. A count is events, not volume or harm. Equal counts share a rank.
- 1Brickendon STW46spills
Thames Water
- 2Harpenden STW7spills
Thames Water
- 3East Hyde STW6spills
Thames Water
- 3Mill Green STW6spills
Thames Water
- 5Wheathampstead SPS3spills
Thames Water
Spills over time
The median outlet on Lee (from Luton Hoo Lakes to Hertford) recorded 6 spills in 2025, against 11 across England.
6 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 0 recorded more spills, 6 fewer and 0 the same. Together they went from 197 to 68 spills, a fall of 65%.
| Year | Outlets with a count | Total spills | Median per outlet | England median |
|---|---|---|---|---|
| 2025 | 7 | 68 | 6 | 11 |
| 2024 | 7 | 214 | 20 | 19 |
| 2023 | 6 | 139 | 7 | 20 |
| 2022 | 1 | 54 | 54 | 13 |
| 2021 | 1 | 67 | 67 | 19 |
Earlier returns list fewer of these outlets, so totals are not comparable between years. The median per outlet and the like-for-like change are fairer comparisons. Counts are events, not volume.
All outlet records on Lee (from Luton Hoo Lakes to Hertford)
7 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.
- Brickendon STWHarmonds Brook West Arm · 46 spills in 2025
- East Hyde STWThe River Lee · 6 spills in 2025
- Essendon SPSLea · 0 spills in 2025
- Harpenden STWLee · 7 spills in 2025
- Mill Green STWLee · 6 spills in 2025
- West End (Essendon) SPSWood Hill Brook · 0 spills in 2025
- Wheathampstead SPSRiver Lee · 3 spills in 2025
Sources and dates
Outlet locations, waterbody links and spill figures come from the Environment Agency 2025 event duration monitoring annual return. The latest company reports come from each operator’s live feed and carry their own dates. Waterbody ID: GB106038033392. The official waterbody record is a source lookup; its classification is not imported here.
Questions about Lee (from Luton Hoo Lakes to Hertford)
- Which outlets are linked to Lee (from Luton Hoo Lakes to Hertford)?
- The source links 7 outlet records to waterbody GB106038033392. The link comes from the annual return; it does not model where a discharge travelled.
- How many spills were recorded for Lee (from Luton Hoo Lakes to Hertford)?
- 7 records report 68 spills in 2025 and 693 recorded hours. All listed records have a usable count. Outlets can discharge at the same time, so the hours are not the time the whole water was affected.
- Who is responsible for the outlets on Lee (from Luton Hoo Lakes to Hertford)?
- Thames Water operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
- Which outlets on Lee (from Luton Hoo Lakes to Hertford) are linked to a live feed?
- 7 of the 7 records are matched to a monitor in a company live feed. A link does not mean the monitor is working now. Use the status filters above to see the latest report for each outlet, with its date. The rest show annual figures only.
- How complete is the monitoring for Lee (from Luton Hoo Lakes to Hertford)?
- Every record with a monitor operation figure shows 90% or more for 2025.
- Does this show if Lee (from Luton Hoo Lakes to Hertford) is safe?
- No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.