Longworth Road/Railway Viaduct CSO
Storm overflow operated by United Utilities. The source names River Calder as the receiving water.
- 41
- Spills in 2025
- 105
- Recorded hours
- 99.4%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
Longworth Road/Railway Viaduct CSO recorded 41 spills in 2025. That is more than 83% of the 14,239 overflows in England with a reported figure, and ranks 2,313th nationally. Among United Utilities overflows it ranks 567th of 2,270; the median United Utilities overflow recorded 15 spills. On the Calder - Pendle Water to conf Ribble waterbody it ranks 11th of 28.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 41 | 105 |
| England | 2,313th of 14,239 | 11 | 22.3 |
| United Utilities | 567th of 2,270 | 15 | 29.1 |
| Calder - Pendle Water to conf Ribble | 11th of 28 | 29.5 | 62.4 |
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 | 41 | 105 hours | 99.4% | Official data |
| 2024 | 36 | 121.2 hours | 80.7%Low coverage | 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
- EPRSB3395WA
- Activity reference
- A1
- Grid reference
- SD7278036090
- Waterbody ID
- GB112071065490Official 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 0.7 km north-east of the Billington (Ribble Valley) 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
- Ridding Lane Combined Sewage OverflowCurrent status unknown
United Utilities · River Calder
- Whittams Farm CSOCurrent status unknown
United Utilities · Unnamed Tributary River Calder
- WHALLEY WwTWCurrent status unknown
United Utilities · The River Calder
- BILLINGTON WwTWCurrent status unknown
United Utilities · River Calder
Questions about Longworth Road/Railway Viaduct CSO
- Who operates Longworth Road/Railway Viaduct CSO?
- United Utilities is the operator named in the annual record. The permit reference is EPRSB3395WA.
- Where does Longworth Road/Railway Viaduct CSO discharge?
- The source names River Calder as the receiving water. This does not show how far a discharge travelled.
- How many times did Longworth Road/Railway Viaduct CSO spill in 2025?
- The 2025 return records 41 counted spill events and 105 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 99.4% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Longworth Road/Railway Viaduct 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 Longworth Road/Railway Viaduct 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 Longworth Road/Railway Viaduct CSO compare with other overflows?
- Longworth Road/Railway Viaduct CSO recorded 41 spills in 2025. That is more than 83% of the 14,239 overflows in England with a reported figure, and ranks 2,313th nationally. Among United Utilities overflows it ranks 567th of 2,270; the median United Utilities overflow recorded 15 spills. On the Calder - Pendle Water to conf Ribble waterbody it ranks 11th of 28. 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.