Clayton Bridge CSO
Storm overflow operated by United Utilities. The source names River Medlock as the receiving water.
- 42
- Spills in 2025
- 173.4
- Recorded hours
- 84.1%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
Clayton Bridge CSO recorded 42 spills in 2025. That is more than 83% of the 14,239 overflows in England with a reported figure, and ranks 2,238th nationally. Among United Utilities overflows it ranks 554th of 2,270; the median United Utilities overflow recorded 15 spills. On the Medlock (Lumb Brook to Irwell) waterbody it ranks 2nd of 33.
The monitor worked for 84.1% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 42 | 173.4 |
| England | 2,238th of 14,239 | 11 | 22.3 |
| United Utilities | 554th of 2,270 | 15 | 29.1 |
| Medlock (Lumb Brook to Irwell) | 2nd of 33 | 1 | 0.4 |
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 | 42 | 173.4 hours | 84.1%Low coverage | Official data |
| 2024 | 65 | 530.4 hours | 100% | 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
- 01TAM0004
- Activity reference
- A1
- Grid reference
- SJ8909099420
- Waterbody ID
- GB112069061152Official 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 1.3 km north-west of the Droylsden reference point in the ONS built-up areas data.
Area and water pages
- Manchester area →
- Droylsden area →
- Audenshaw area →
- Chadderton area →
- Pendlebury area →
- Salford area →
- Prestwich area →
- Failsworth area →
- Rhodes area →
- Denton (Tameside) area →
- Simister area →
- Woodhouses area →
- Middleton (Rochdale) area →
- Reddish area →
- Ashton-under-Lyne area →
- Birch area →
- Dukinfield area →
- Bredbury and Woodley area →
- Oldham area →
- Slattocks area →
- Hyde (Tameside) area →
- Stockport area →
- Royton area →
- Stalybridge area →
- Mossley area →
- Medlock (Lumb Brook to Irwell) 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
- Junction of GRAVER LANE and ELSMA ROAD CSOCurrent status unknown
United Utilities · Berry Brow Culvert
- Assheton Road CSOCurrent status unknown
United Utilities · Clvrt Tributary of River Mersey
- FAILSWORTH WwTWCurrent status unknown
United Utilities · The River Medlock
- FAILSWORTH WwTWCurrent status unknown
United Utilities · The River Medlock
Questions about Clayton Bridge CSO
- Who operates Clayton Bridge CSO?
- United Utilities is the operator named in the annual record. The permit reference is 01TAM0004.
- Where does Clayton Bridge CSO discharge?
- The source names River Medlock as the receiving water. This does not show how far a discharge travelled.
- How many times did Clayton Bridge CSO spill in 2025?
- The 2025 return records 42 counted spill events and 173.4 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 84.1% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is Clayton Bridge CSO 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 Clayton Bridge CSO?
- 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 Clayton Bridge CSO compare with other overflows?
- Clayton Bridge CSO recorded 42 spills in 2025. That is more than 83% of the 14,239 overflows in England with a reported figure, and ranks 2,238th nationally. Among United Utilities overflows it ranks 554th of 2,270; the median United Utilities overflow recorded 15 spills. On the Medlock (Lumb Brook to Irwell) waterbody it ranks 2nd of 33. 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.