HIGH LEGH WwTW
Storm overflow operated by United Utilities. The source names Agden Brook as the receiving water.
- 15
- Spills in 2025
- 103.4
- Recorded hours
- 100%
- Monitor operation
- 2
- Years listed
The reported spill count was 7 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
HIGH LEGH WwTW recorded 15 spills in 2025. That is more than 56% of the 14,239 overflows in England with a reported figure, and ranks 5,981st nationally. Among United Utilities overflows it ranks 1,121st of 2,270; the median United Utilities overflow recorded 15 spills. On the Manchester Ship Canal waterbody it ranks 11th of 18.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 15 | 103.4 |
| England | 5,981st of 14,239 | 11 | 22.3 |
| United Utilities | 1,121st of 2,270 | 15 | 29.1 |
| Manchester Ship Canal | 11th of 18 | 22.5 | 67 |
Rank 1 has the most spills. Equal counts share a rank. Only overflows with a reported count are ranked. Counts do not measure volume, so a higher rank does not mean more sewage.
Annual spill history
| Year | Spills | Duration | Monitor operation | Source |
|---|---|---|---|---|
| 2025 | 15 | 103.4 hours | 100% | Official data |
| 2024 | 22 | 185.4 hours | 99.7% | Official data |
A missing figure means the source did not provide a usable value. A zero is shown as zero. Monitor operation below 90% can make comparison less reliable.
Outlet details
- Water company
- United Utilities
- Outlet type
- Inlet storm overflow at a wastewater treatment works
- Permit
- 016910006
- Activity reference
- A2
- Grid reference
- SJ7065083900
- Waterbody ID
- GB71210004Official waterbody record ↗
- Location source
- Official annual grid reference
- Location precision
- About 1 metres
- Location note
- Unknown
About the name and type
The annual return lists this asset as “Inlet SO at WwTW”: inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
The waterbody link opens the Environment Agency record for the exact ID in the return. It is a source lookup; we do not import its classification.
Where it is
The recorded position is about 0.6 km east of the High Legh reference point in the ONS built-up areas data.
Area and water pages
Check the official record
Public access to this outlet is unknown. Do not enter restricted land or use this page as a route guide.
Open official source ↗Other outlet records nearby
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United Utilities · Bridgewater Canal
- Eagle Brow CSO (489KT)Current status unknown
United Utilities · Slitten Brook
- Rear of No. 166 Bridgewater Street CSOCurrent status unknown
United Utilities · Slitten Brook
Questions about HIGH LEGH WwTW
- Who operates HIGH LEGH WwTW?
- United Utilities is the operator named in the annual record. The permit reference is 016910006.
- Where does HIGH LEGH WwTW discharge?
- The source names Agden Brook as the receiving water. This does not show how far a discharge travelled.
- How many times did HIGH LEGH WwTW spill in 2025?
- The 2025 return records 15 counted spill events and 103.4 hours of recorded discharge. Spills are counted with the 12/24-hour method, so this is not a count of every start signal.
- Can I trust the 2025 figures for this outlet?
- The monitor worked for 100% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is HIGH LEGH WwTW discharging right now?
- This record is linked to a company live feed. The panel above shows the latest report we hold, with its date. That report can be old, and the monitor can be offline, so check the date before relying on it. A report that no discharge is taking place is not a water-quality result.
- How accurate is the map marker?
- The marker comes from the grid reference in the official annual return, which is accurate to about 1 metres. It shows the recorded outlet position, not the extent of any discharge.
- What kind of outlet is HIGH LEGH WwTW?
- The annual return lists the asset type as “Inlet SO at WwTW”, which means inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
- How does HIGH LEGH WwTW compare with other overflows?
- HIGH LEGH WwTW recorded 15 spills in 2025. That is more than 56% of the 14,239 overflows in England with a reported figure, and ranks 5,981st nationally. Among United Utilities overflows it ranks 1,121st of 2,270; the median United Utilities overflow recorded 15 spills. On the Manchester Ship Canal waterbody it ranks 11th of 18. Ranks compare counted spill events only. They do not compare volume or harm.
- Does zero spills mean the water was safe?
- No. A zero means the annual return recorded zero counted spill events for this outlet and year. It is not a water-quality test, and pollution can come from other sources.