Cooper Bridge/CSO
Storm overflow operated by Yorkshire Water. The source names River Calder as the receiving water.
- 9
- Spills in 2025
- 6.5
- Recorded hours
- 99.9%
- Monitor operation
- 6
- Years listed
Checking the latest monitor report…
How it compares in 2025
Cooper Bridge/CSO recorded 9 spills in 2025. That is more than 45% of the 14,239 overflows in England with a reported figure, and ranks 7,492nd nationally. Among Yorkshire Water overflows it ranks 1,317th of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Calder from Ryburn Confluence to River Colne waterbody it ranks 25th of 39.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 9 | 6.5 |
| England | 7,492nd of 14,239 | 11 | 22.3 |
| Yorkshire Water | 1,317th of 2,176 | 16 | 37.8 |
| Calder from Ryburn Confluence to River Colne | 25th of 39 | 21 | 27.5 |
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 | 9 | 6.5 hours | 99.9% | Official data |
| 2024 | 3 | 1 hours | 76%Low coverage | Official data |
| 2023 | 1 | 0.3 hours | 30.2%Low coverage | Official data |
| 2022 | 3 | 0.8 hours | 78.2%Low coverage | Official data |
| 2021 | 7 | 2.5 hours | 99.8% | Official data |
| 2020 | 14 | 7 hours | 99.8% | 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
- Yorkshire Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- EPRTP3920XR
- Activity reference
- A1
- Grid reference
- SE1759920604
- Waterbody ID
- GB104027062642Official 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 south-west of the Moor Top reference point in the ONS built-up areas data.
Area and water pages
- Drighlington area →
- Gomersal and Birkenshaw area →
- Brighouse area →
- Scholes (near Cleckheaton) area →
- Cleckheaton area →
- Oakenshaw area →
- Norwood Green area →
- Kirkheaton area →
- Elland area →
- Moor Top area →
- Liversedge area →
- Shelf and Northowram area →
- Holywell Green and Stainland area →
- Mirfield area →
- Lepton area →
- Huddersfield area →
- Heckmondwike area →
- Outlane area →
- Scapegoat Hill area →
- Grange Moor area →
- Batley area →
- Dewsbury area →
- Netherton (Kirklees) area →
- Kirkburton area →
- Calder from Ryburn Confluence to River Colne 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
- Bog Green Lane/CSOCurrent status unknown
Yorkshire Water · River Colne
- Oak Road/CSOCurrent status unknown
Yorkshire Water · Tributary of Huddersfield Broad Can
- Brighouse/Upper STW/3Xdwf OverflowCurrent status unknown
Yorkshire Water · River Calder & River Colne
- Brighouse/Upper STW/6Xdwf OverflowCurrent status unknown
Yorkshire Water · River Calder & River Colne
Questions about Cooper Bridge/CSO
- Who operates Cooper Bridge/CSO?
- Yorkshire Water is the operator named in the annual record. The permit reference is EPRTP3920XR.
- Where does Cooper Bridge/CSO discharge?
- The source names River Calder as the receiving water. This does not show how far a discharge travelled.
- How many times did Cooper Bridge/CSO spill in 2025?
- The 2025 return records 9 counted spill events and 6.5 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 99.9% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Cooper 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 Cooper 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 Cooper Bridge/CSO compare with other overflows?
- Cooper Bridge/CSO recorded 9 spills in 2025. That is more than 45% of the 14,239 overflows in England with a reported figure, and ranks 7,492nd nationally. Among Yorkshire Water overflows it ranks 1,317th of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Calder from Ryburn Confluence to River Colne waterbody it ranks 25th of 39. 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.