White Horse Yard CSO
Storm overflow operated by United Utilities. The source names To Railway Track Drain as the receiving water.
- 33
- Spills in 2025
- 13.3
- Recorded hours
- 96.5%
- Monitor operation
- 2
- Years listed
The reported spill count was 1 higher than in 2024. This compares event counts, not discharge volume.
We do not have a live report for this outlet. Its annual spill records are shown below.
How it compares in 2025
White Horse Yard CSO recorded 33 spills in 2025. That is more than 77% of the 14,239 overflows in England with a reported figure, and ranks 3,116th nationally. Among United Utilities overflows it ranks 715th of 2,270; the median United Utilities overflow recorded 15 spills. On the Ellen (lower) waterbody it ranks 10th of 12.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 33 | 13.3 |
| England | 3,116th of 14,239 | 11 | 22.3 |
| United Utilities | 715th of 2,270 | 15 | 29.1 |
| Ellen (lower) | 10th of 12 | 79 | 372 |
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 | 33 | 13.3 hours | 96.5% | Official data |
| 2024 | 32 | 15.1 hours | 98.8% | 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
- United Utilities
- Outlet type
- Storm overflow on the sewer network
- Permit
- 01ALL0028
- Activity reference
- A1
- Grid reference
- NY1503041820
- Waterbody ID
- GB112075073640Official 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 0.3 km south of the Aspatria 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
- North Road CSOCurrent status unknown
United Utilities · Unnamed Tributary of Sandwith Beck
- Ellen ValeCurrent status unknown
United Utilities · River Ellen
- Plumbland WwTWCurrent status unknown
United Utilities · River Ellen
- BLENNERHASSET WwTWCurrent status unknown
United Utilities · River Ellen
Questions about White Horse Yard CSO
- Who operates White Horse Yard CSO?
- United Utilities is the operator named in the annual record. The permit reference is 01ALL0028.
- Where does White Horse Yard CSO discharge?
- The source names To Railway Track Drain as the receiving water. This does not show how far a discharge travelled.
- How many times did White Horse Yard CSO spill in 2025?
- The 2025 return records 33 counted spill events and 13.3 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 96.5% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is White Horse Yard CSO discharging right now?
- This record is not matched to a company live feed, so we cannot show a current report. Only the annual figures are available for this outlet.
- 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 White Horse Yard 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 White Horse Yard CSO compare with other overflows?
- White Horse Yard CSO recorded 33 spills in 2025. That is more than 77% of the 14,239 overflows in England with a reported figure, and ranks 3,116th nationally. Among United Utilities overflows it ranks 715th of 2,270; the median United Utilities overflow recorded 15 spills. On the Ellen (lower) waterbody it ranks 10th 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.