Lyon park avenue
Storm overflow operated by Thames Water. The source names Wembley Brook as the receiving water.
- 1
- Spills in 2025
- 0.5
- Recorded hours
- 100%
- Monitor operation
- 3
- Years listed
The reported spill count was 2 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Lyon park avenue recorded 1 spill in 2025. That is more than 15% of the 14,239 overflows in England with a reported figure, and ranks 11,130th nationally. Among Thames Water overflows it ranks 402nd of 579; the median Thames Water overflow recorded 6 spills. On the Lower Brent waterbody it ranks 8th of 21.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 1 | 0.5 |
| England | 11,130th of 14,239 | 11 | 22.3 |
| Thames Water | 402nd of 579 | 6 | 20.9 |
| Lower Brent | 8th of 21 | 1 | 0.5 |
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 | 1 | 0.5 hours | 100% | Official data |
| 2024 | 3 | 4.3 hours | 100% | Official data |
| 2023 | 3 | 1.8 hours | 99.9% | 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
- Thames Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- TEMP.2754
- Activity reference
- 1 activity on permit
- Grid reference
- TQ1834084660
- Waterbody ID
- GB106039023590Official 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 1.7 km south-west of the Brent 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
- Abbeydale RoadCurrent status unknown
Thames Water
- Garden wayCurrent status unknown
Thames Water · River Brent
- Sudbury heights ave, allendale roadCurrent status unknown
Thames Water · Wembley Brook
- District roadCurrent status unknown
Thames Water · Wembley Brook
Questions about Lyon park avenue
- Who operates Lyon park avenue?
- Thames Water is the operator named in the annual record. The permit reference is TEMP.2754.
- Where does Lyon park avenue discharge?
- The source names Wembley Brook as the receiving water. This does not show how far a discharge travelled.
- How many times did Lyon park avenue spill in 2025?
- The 2025 return records 1 counted spill events and 0.5 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 Lyon park avenue 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 Lyon park avenue?
- 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 Lyon park avenue compare with other overflows?
- Lyon park avenue recorded 1 spill in 2025. That is more than 15% of the 14,239 overflows in England with a reported figure, and ranks 11,130th nationally. Among Thames Water overflows it ranks 402nd of 579; the median Thames Water overflow recorded 6 spills. On the Lower Brent waterbody it ranks 8th of 21. 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.