Shoreham CSO - 115434
Storm overflow operated by Southern Water. The source names English Channel as the receiving water.
- 39
- Spills in 2025
- 109.9
- Recorded hours
- 100%
- Monitor operation
- 2
- Years listed
The reported spill count was 24 lower 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
Shoreham CSO - 115434 recorded 39 spills in 2025. That is more than 81% of the 14,239 overflows in England with a reported figure, and ranks 2,494th nationally. Among Southern Water overflows it ranks 126th of 975; the median Southern Water overflow recorded 7 spills. On the Sussex waterbody it ranks 4th of 25.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 39 | 109.9 |
| England | 2,494th of 14,239 | 11 | 22.3 |
| Southern Water | 126th of 975 | 7 | 17 |
| Sussex | 4th of 25 | 4 | 9.6 |
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 | 39 | 109.9 hours | 100% | Official data |
| 2024 | 63 | 290.3 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
- Southern Water
- Outlet type
- Inlet storm overflow at a wastewater treatment works
- Permit
- A01105
- Activity reference
- Storm
- Grid reference
- TQ2410004230
- Waterbody ID
- GB640704540003Official 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 “Inlet SO at WwTW”: inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
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 south of the Southwick (Adur) reference point in the ONS built-up areas data.
Designated bathing waters within 3 km in a straight line:
Distance does not show that water from this outlet reaches a bathing water. Check the official bathing-water profile for its classification and advice.
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
- Albion Street Portslade Emo - 110362Current status unknown
Southern Water · English Channel
- The Green Southwick CSO - 108356Current status unknown
Southern Water · The Adur Estuary
- Upper Shoreham Road Shoreham CSO - 108819Current status unknown
Southern Water · River Adur
- Ropetackle Street Shoreham CEO - 108324Current status unknown
Southern Water · The River Adur (Tidal)
Questions about Shoreham CSO - 115434
- Who operates Shoreham CSO - 115434?
- Southern Water is the operator named in the annual record. The permit reference is A01105.
- Where does Shoreham CSO - 115434 discharge?
- The source names English Channel as the receiving water. This does not show how far a discharge travelled.
- How many times did Shoreham CSO - 115434 spill in 2025?
- The 2025 return records 39 counted spill events and 109.9 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 100% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Shoreham CSO - 115434 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 Shoreham CSO - 115434?
- The annual return lists the asset type as “Inlet SO at WwTW”, which means inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
- How does Shoreham CSO - 115434 compare with other overflows?
- Shoreham CSO - 115434 recorded 39 spills in 2025. That is more than 81% of the 14,239 overflows in England with a reported figure, and ranks 2,494th nationally. Among Southern Water overflows it ranks 126th of 975; the median Southern Water overflow recorded 7 spills. On the Sussex waterbody it ranks 4th of 25. 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.