Castle Street Cowes CSO - 108822
Storm overflow operated by Southern Water. The source names River Medina as the receiving water.
- 9
- Spills in 2025
- 2.4
- Recorded hours
- 100%
- Monitor operation
- 5
- Years listed
The reported spill count was the same as in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Castle Street Cowes CSO - 108822 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 Southern Water overflows it ranks 438th of 975; the median Southern Water overflow recorded 7 spills. On the Medina waterbody it ranks 8th of 9.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 9 | 2.4 |
| England | 7,492nd of 14,239 | 11 | 22.3 |
| Southern Water | 438th of 975 | 7 | 17 |
| Medina | 8th of 9 | 40 | 37.9 |
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 | 2.4 hours | 100% | Official data |
| 2024 | 9 | 5 hours | 100% | Official data |
| 2023 | 5 | 2.2 hours | 96.1% | Official data |
| 2022 | 3 | 0.6 hours | 100% | Official data |
| 2021 | 3 | 3.7 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
- Storm discharge at a pumping station
- Permit
- A01298
- Activity reference
- Storm
- Grid reference
- SZ5019095910
- Waterbody ID
- GB520710101600Official 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 discharge at pumping station”: storm discharge at a pumping station. The overflow is at a pumping station that moves sewage through the 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 1.1 km north-west of the East Cowes 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
- Albany Road East Cowes CEO - 116071Current status unknown
Southern Water · The Solent
- Medina Road Cowes CEO - 108537Current status unknown
Southern Water · Medina Estuary
- Floating Bridge Cowes CSO - 109300Current status unknown
Southern Water · River Medina
- St Marys Road Cowes CSO - 108562Current status unknown
Southern Water · The Solent
Questions about Castle Street Cowes CSO - 108822
- Who operates Castle Street Cowes CSO - 108822?
- Southern Water is the operator named in the annual record. The permit reference is A01298.
- Where does Castle Street Cowes CSO - 108822 discharge?
- The source names River Medina as the receiving water. This does not show how far a discharge travelled.
- How many times did Castle Street Cowes CSO - 108822 spill in 2025?
- The 2025 return records 9 counted spill events and 2.4 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 100% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Castle Street Cowes CSO - 108822 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 Castle Street Cowes CSO - 108822?
- The annual return lists the asset type as “Storm discharge at pumping station”, which means storm discharge at a pumping station. The overflow is at a pumping station that moves sewage through the network.
- How does Castle Street Cowes CSO - 108822 compare with other overflows?
- Castle Street Cowes CSO - 108822 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 Southern Water overflows it ranks 438th of 975; the median Southern Water overflow recorded 7 spills. On the Medina waterbody it ranks 8th of 9. 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.