Ainsworth Road CSO (091LY)
Storm overflow operated by United Utilities. The source names River Irwell via a surface water sewer as the receiving water.
- 6
- Spills in 2025
- 10.6
- Recorded hours
- 98.4%
- Monitor operation
- 2
- Years listed
The reported spill count was 6 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Ainsworth Road CSO (091LY) recorded 6 spills in 2025. That is more than 37% of the 14,239 overflows in England with a reported figure, and ranks 8,498th nationally. Among United Utilities overflows it ranks 1,473rd of 2,270; the median United Utilities overflow recorded 15 spills. On the Irwell (Roch to Croal) waterbody it ranks 9th of 12.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 6 | 10.6 |
| England | 8,498th of 14,239 | 11 | 22.3 |
| United Utilities | 1,473rd of 2,270 | 15 | 29.1 |
| Irwell (Roch to Croal) | 9th of 12 | 16 | 62 |
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 | 6 | 10.6 hours | 98.4% | Official data |
| 2024 | 12 | 11.1 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
- EPRJB3892ER
- Activity reference
- A1
- Grid reference
- SD7909807250
- Waterbody ID
- GB112069060840Official 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 0.5 km south-east of the Radcliffe reference point in the ONS built-up areas data.
Area and water pages
- Wardley area →
- Clifton (Salford) area →
- Swinton (Salford) area →
- Whitefield area →
- Pendlebury area →
- Salford area →
- Prestwich area →
- Rhodes area →
- Simister area →
- Worsley area →
- Middleton (Rochdale) area →
- Eccles (Salford) area →
- Radcliffe area →
- Birch area →
- Walkden area →
- Kearsley area →
- Little Hulton area →
- Farnworth area →
- Little Lever area →
- Slattocks area →
- Bury (Bury) area →
- Heywood area →
- Ainsworth area →
- Trub area →
- Bolton (Bolton) area →
- Irwell (Roch to Croal) 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
- Church Street East CSOCurrent status unknown
United Utilities · Unnamed Tributary of River Irwell
- Church Street West CSOCurrent status unknown
United Utilities · River Irwell
- Stand Lane CSOCurrent status unknown
United Utilities · River Irwell
- Outside The Bridge Tavern CSOCurrent status unknown
United Utilities · River Irwell
Questions about Ainsworth Road CSO (091LY)
- Who operates Ainsworth Road CSO (091LY)?
- United Utilities is the operator named in the annual record. The permit reference is EPRJB3892ER.
- Where does Ainsworth Road CSO (091LY) discharge?
- The source names River Irwell via a surface water sewer as the receiving water. This does not show how far a discharge travelled.
- How many times did Ainsworth Road CSO (091LY) spill in 2025?
- The 2025 return records 6 counted spill events and 10.6 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 98.4% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Ainsworth Road CSO (091LY) 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 Ainsworth Road CSO (091LY)?
- 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 Ainsworth Road CSO (091LY) compare with other overflows?
- Ainsworth Road CSO (091LY) recorded 6 spills in 2025. That is more than 37% of the 14,239 overflows in England with a reported figure, and ranks 8,498th nationally. Among United Utilities overflows it ranks 1,473rd of 2,270; the median United Utilities overflow recorded 15 spills. On the Irwell (Roch to Croal) waterbody it ranks 9th of 12. 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.