Hall Nook CSO (481XO) (WAR0007)
Storm overflow operated by United Utilities. The source names Penketh Brook as the receiving water.
- 56
- Spills in 2025
- 131.5
- Recorded hours
- 100%
- Monitor operation
- 2
- Years listed
The reported spill count was 20 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Hall Nook CSO (481XO) (WAR0007) recorded 56 spills in 2025. That is more than 90% of the 14,239 overflows in England with a reported figure, and ranks 1,296th nationally. Among United Utilities overflows it ranks 355th of 2,270; the median United Utilities overflow recorded 15 spills. On the MERSEY - Transitional waterbody it ranks 16th of 78.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 56 | 131.5 |
| England | 1,296th of 14,239 | 11 | 22.3 |
| United Utilities | 355th of 2,270 | 15 | 29.1 |
| MERSEY - Transitional | 16th of 78 | 15 | 34.5 |
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 | 56 | 131.5 hours | 100% | Official data |
| 2024 | 76 | 177.2 hours | 97% | 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
- Storm overflow on the sewer network
- Permit
- 01WAR0007
- Activity reference
- A1
- Grid reference
- SJ5666487360
- Waterbody ID
- GB531206908100Official 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 “SO on sewer network”: storm overflow on the sewer network. The return places this overflow on the sewer network.
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 3.4 km north-west of the Moore 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
- The Warrington Road CSOCurrent status unknown
United Utilities · Whittle Brook
- Highfield Avenue CSOCurrent status unknown
United Utilities · Tributary Whittle Brook via SWS
- Whittle Brook PSCurrent status unknown
United Utilities · Mersey Estuary
- Thornton Road Depot CSOCurrent status unknown
United Utilities · Sankey Brook
Questions about Hall Nook CSO (481XO) (WAR0007)
- Who operates Hall Nook CSO (481XO) (WAR0007)?
- United Utilities is the operator named in the annual record. The permit reference is 01WAR0007.
- Where does Hall Nook CSO (481XO) (WAR0007) discharge?
- The source names Penketh Brook as the receiving water. This does not show how far a discharge travelled.
- How many times did Hall Nook CSO (481XO) (WAR0007) spill in 2025?
- The 2025 return records 56 counted spill events and 131.5 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 Hall Nook CSO (481XO) (WAR0007) 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 Hall Nook CSO (481XO) (WAR0007)?
- The annual return lists the asset type as “SO on sewer network”, which means storm overflow on the sewer network. The return places this overflow on the sewer network.
- How does Hall Nook CSO (481XO) (WAR0007) compare with other overflows?
- Hall Nook CSO (481XO) (WAR0007) recorded 56 spills in 2025. That is more than 90% of the 14,239 overflows in England with a reported figure, and ranks 1,296th nationally. Among United Utilities overflows it ranks 355th of 2,270; the median United Utilities overflow recorded 15 spills. On the MERSEY - Transitional waterbody it ranks 16th of 78. 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.