Westbury STW
Storm overflow operated by Anglian Water. The source names River Great Ouse NT as the receiving water.
- 25
- Spills in 2025
- 33.8
- Recorded hours
- 63%
- Monitor operation
- 5
- Years listed
Checking the latest monitor report…
How it compares in 2025
Westbury STW recorded 25 spills in 2025. That is more than 69% of the 14,239 overflows in England with a reported figure, and ranks 4,212th nationally. Among Anglian Water overflows it ranks 207th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Ouse (Brackley to Buckingham) waterbody it ranks 2nd of 9.
The monitor worked for 63% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 25 | 33.8 |
| England | 4,212th of 14,239 | 11 | 22.3 |
| Anglian Water | 207th of 1,438 | 6 | 13.5 |
| Ouse (Brackley to Buckingham) | 2nd of 9 | 12 | 33.8 |
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 | 25 | 33.8 hours | 63%Low coverage | Official data |
| 2024 | 28 | 69.9 hours | 100% | Official data |
| 2023 | 21 | 24 hours | 58.6%Low coverage | Official data |
| 2022 | 4 | 1.3 hours | 100% | Official data |
| 2021 | 8 | 169.4 hours | 11.4%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
- Anglian Water
- Outlet type
- Storm tank at a wastewater treatment works
- Permit
- AW1NF578
- Activity reference
- A2
- Grid reference
- SP6229035200
- Waterbody ID
- GB105033037860Official 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 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 0.6 km south-east of the Westbury (Buckinghamshire) 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
- Brackley STW (New)Current status unknown
Anglian Water · River Great Ouse
- Evenley STWCurrent status unknown
Anglian Water · Stream River Great Ouse NT
- Brackley (Ex STW Site) TpsCurrent status unknown
Anglian Water · Tributary of the River Ouse
- Brackley-Bridge St SSOCurrent status unknown
Anglian Water · Hinton Stream
Questions about Westbury STW
- Who operates Westbury STW?
- Anglian Water is the operator named in the annual record. The permit reference is AW1NF578.
- Where does Westbury STW discharge?
- The source names River Great Ouse NT as the receiving water. This does not show how far a discharge travelled.
- How many times did Westbury STW spill in 2025?
- The 2025 return records 25 counted spill events and 33.8 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 63% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is Westbury STW 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 Westbury STW?
- 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.
- How does Westbury STW compare with other overflows?
- Westbury STW recorded 25 spills in 2025. That is more than 69% of the 14,239 overflows in England with a reported figure, and ranks 4,212th nationally. Among Anglian Water overflows it ranks 207th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Ouse (Brackley to Buckingham) waterbody it ranks 2nd 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.