Portishead Slade Road O/S 47
Storm overflow operated by Wessex Water. The source names Tributary of Portbury Ditch as the receiving water.
- 12
- Spills in 2025
- 7.6
- Recorded hours
- 100%
- Monitor operation
- 4
- Years listed
The reported spill count was 4 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Portishead Slade Road O/S 47 recorded 12 spills in 2025. That is more than 51% of the 14,239 overflows in England with a reported figure, and ranks 6,643rd nationally. Among Wessex Water overflows it ranks 625th of 1,332; the median Wessex Water overflow recorded 11 spills. On the Portbury Ditch - source to conf R Severn Estuary waterbody it ranks 5th of 6.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 12 | 7.6 |
| England | 6,643rd of 14,239 | 11 | 22.3 |
| Wessex Water | 625th of 1,332 | 11 | 18.9 |
| Portbury Ditch - source to conf R Severn Estuary | 5th of 6 | 17 | 22 |
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 | 12 | 7.6 hours | 100% | Official data |
| 2024 | 16 | 5.5 hours | 100% | Official data |
| 2023 | 16 | 4.5 hours | 100% | Official data |
| 2022 | 12 | 2.3 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
- Wessex Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- 100558/CS/01
- Activity reference
- 1-STORM OVERFLOW
- Grid reference
- ST4701076250
- Waterbody ID
- GB109052027330Official 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 0.4 km east of the Portishead 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
- Portishead Coombe/Slade Road JunctionCurrent status unknown
Wessex Water · Tributary of Portbury Ditch
- Portishead High Street Nr Builders YardCurrent status unknown
Wessex Water · Portbury Ditch
- Portishead Poacher Hotel (Anchor Hotel)Current status unknown
Wessex Water · Portbury Ditch
- Portishead Brampton WayCurrent status unknown
Wessex Water · Portbury Ditch via SWS
Questions about Portishead Slade Road O/S 47
- Who operates Portishead Slade Road O/S 47?
- Wessex Water is the operator named in the annual record. The permit reference is 100558/CS/01.
- Where does Portishead Slade Road O/S 47 discharge?
- The source names Tributary of Portbury Ditch as the receiving water. This does not show how far a discharge travelled.
- How many times did Portishead Slade Road O/S 47 spill in 2025?
- The 2025 return records 12 counted spill events and 7.6 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 Portishead Slade Road O/S 47 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 Portishead Slade Road O/S 47?
- 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 Portishead Slade Road O/S 47 compare with other overflows?
- Portishead Slade Road O/S 47 recorded 12 spills in 2025. That is more than 51% of the 14,239 overflows in England with a reported figure, and ranks 6,643rd nationally. Among Wessex Water overflows it ranks 625th of 1,332; the median Wessex Water overflow recorded 11 spills. On the Portbury Ditch - source to conf R Severn Estuary waterbody it ranks 5th of 6. 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.