Great Stone Road CSO (459KP)
Storm overflow operated by United Utilities. The source names Chorlton Brook as the receiving water.
- 4
- Spills in 2025
- 18.8
- Recorded hours
- 99.7%
- Monitor operation
- 2
- Years listed
The reported spill count was 5 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Great Stone Road CSO (459KP) recorded 4 spills in 2025. That is more than 30% of the 14,239 overflows in England with a reported figure, and ranks 9,334th nationally. Among United Utilities overflows it ranks 1,592nd of 2,270; the median United Utilities overflow recorded 15 spills. On the Chorlton Brook (Princess Parkway to Mersey) waterbody it ranks 5th of 7.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 4 | 18.8 |
| England | 9,334th of 14,239 | 11 | 22.3 |
| United Utilities | 1,592nd of 2,270 | 15 | 29.1 |
| Chorlton Brook (Princess Parkway to Mersey) | 5th of 7 | 5 | 18.8 |
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 | 4 | 18.8 hours | 99.7% | Official data |
| 2024 | 9 | 27.4 hours | 91.9% | 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
- Unpermitted
- Activity reference
- A1
- Grid reference
- SJ7784293480
- Waterbody ID
- GB112069061040Official 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 2 km north-west of the Sale reference point in the ONS built-up areas data.
Area and water pages
- Manchester area →
- Wardley area →
- Clifton (Salford) area →
- Swinton (Salford) area →
- Pendlebury area →
- Salford area →
- Worsley area →
- Eccles (Salford) area →
- Old Trafford area →
- Walkden area →
- Stretford area →
- Urmston area →
- Sale area →
- Gatley area →
- Wythenshawe area →
- Cheadle (Stockport) area →
- Chorlton Brook (Princess Parkway to Mersey) waterbody →
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
- Bradley Lane (Stretford) CSOCurrent status unknown
United Utilities · River Mersey
- STRETFORD WwTWCurrent status unknown
United Utilities · River Mersey
- Lime Tree Close CSOCurrent status unknown
United Utilities · River Mersey
- SALE WwTWCurrent status unknown
United Utilities · Stromford Brook
Questions about Great Stone Road CSO (459KP)
- Who operates Great Stone Road CSO (459KP)?
- United Utilities is the operator named in the annual record. The permit reference is Unpermitted.
- Where does Great Stone Road CSO (459KP) discharge?
- The source names Chorlton Brook as the receiving water. This does not show how far a discharge travelled.
- How many times did Great Stone Road CSO (459KP) spill in 2025?
- The 2025 return records 4 counted spill events and 18.8 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 99.7% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Great Stone Road CSO (459KP) 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 Great Stone Road CSO (459KP)?
- 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 Great Stone Road CSO (459KP) compare with other overflows?
- Great Stone Road CSO (459KP) recorded 4 spills in 2025. That is more than 30% of the 14,239 overflows in England with a reported figure, and ranks 9,334th nationally. Among United Utilities overflows it ranks 1,592nd of 2,270; the median United Utilities overflow recorded 15 spills. On the Chorlton Brook (Princess Parkway to Mersey) waterbody it ranks 5th of 7. 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.