Swalecliffe SSO - 115445
Storm overflow operated by Southern Water. The source names The North Sea as the receiving water.
- 4
- Spills in 2025
- 18.4
- Recorded hours
- 97.7%
- 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
Swalecliffe SSO - 115445 recorded 4 spills in 2025. That is more than 30% of the 14,239 overflows in England with a reported figure, and ranks 9,334th nationally. Among Southern Water overflows it ranks 572nd of 975; the median Southern Water overflow recorded 7 spills.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 4 | 18.4 |
| England | 9,334th of 14,239 | 11 | 22.3 |
| Southern Water | 572nd of 975 | 7 | 17 |
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 | 4 | 18.4 hours | 97.7% | Official data |
| 2024 | 3 | 15.1 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
- Southern Water
- Outlet type
- Storm tank at a wastewater treatment works
- Permit
- A01102
- Activity reference
- Settled Storm
- Grid reference
- TR1415069530
- Waterbody ID
- GB640604640000Official 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 “Storm tank at WwTW”: storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.
The source name includes SSO, which Southern Water defines as Settled Storm Overflow. The name and the listed type are separate source fields, so the name does not describe the layout of the site. Southern Water flow and spill reporting glossary ↗
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 4.7 km north-east of the Whitstable 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
- Swalecliffe CSO - 115444Current status unknown
Southern Water · The North Sea
- Brook Road Swalecliffe CEO - 110179Current status unknown
Southern Water · Freshwater River
- Northwood Road Whitstable No 1 CSO - 102252Current status unknown
Southern Water · Controlled Sea
- Northwood Road Whitstable No 2 CSO - 103280Current status unknown
Southern Water · Controlled Sea
Questions about Swalecliffe SSO - 115445
- Who operates Swalecliffe SSO - 115445?
- Southern Water is the operator named in the annual record. The permit reference is A01102.
- Where does Swalecliffe SSO - 115445 discharge?
- The source names The North Sea as the receiving water. This does not show how far a discharge travelled.
- How many times did Swalecliffe SSO - 115445 spill in 2025?
- The 2025 return records 4 counted spill events and 18.4 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 97.7% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Swalecliffe SSO - 115445 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 Swalecliffe SSO - 115445?
- The annual return lists the asset type as “Storm tank at WwTW”, which means storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works. The source name includes SSO, which Southern Water defines as Settled Storm Overflow. The name and the listed type are separate source fields.
- How does Swalecliffe SSO - 115445 compare with other overflows?
- Swalecliffe SSO - 115445 recorded 4 spills in 2025. That is more than 30% of the 14,239 overflows in England with a reported figure, and ranks 9,334th nationally. Among Southern Water overflows it ranks 572nd of 975; the median Southern Water overflow recorded 7 spills. 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.