Bristol Hollyguest Road O/S 16
Storm overflow operated by Wessex Water. The source names River Avon as the receiving water.
- 4
- Spills in 2025
- 0.6
- Recorded hours
- 100%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
Bristol Hollyguest Road O/S 16 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 Wessex Water overflows it ranks 897th of 1,332; the median Wessex Water overflow recorded 11 spills. On the Bristol Avon (By Bk to Netham Weir) waterbody it ranks 90th of 126.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 4 | 0.6 |
| England | 9,334th of 14,239 | 11 | 22.3 |
| Wessex Water | 897th of 1,332 | 11 | 18.9 |
| Bristol Avon (By Bk to Netham Weir) | 90th of 126 | 12 | 5.4 |
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 | 0.6 hours | 100% | Official data |
| 2024 | 2 | 0.9 hours | 84.2%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
- Wessex Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- Permit applied for
- Activity reference
- Unknown
- Grid reference
- ST6289572185
- Waterbody ID
- GB109053027371Official 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 3.8 km east of the Bristol reference point in the ONS built-up areas data.
Area and water pages
- Bristol area →
- Filton area →
- Kingswood and Fishponds area →
- Stoke Gifford area →
- Hambrook (South Gloucestershire) area →
- Bitton area →
- Leigh Woods area →
- Whiteshill area →
- Abbots Leigh area →
- Patchway area →
- Keynsham area →
- Upton Cheyney area →
- Long Ashton area →
- Whitchurch (Bath and North East Somerset) area →
- Saltford area →
- Wick (South Gloucestershire) area →
- Bradley Stoke area →
- Corston (Bath and North East Somerset) area →
- Dundry area →
- Bristol Avon (By Bk to Netham Weir) waterbody →
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
- Bristol Hollyguest Road Jnc Greenbank RoadCurrent status unknown
Wessex Water · River Avon
- Bristol Hollyguest Road R/O 21Current status unknown
Wessex Water · River Avon
- Bristol Hanham Polly Barnes HillCurrent status unknown
Wessex Water · River Avon (via SWS)
- Bristol Hanham High StreetCurrent status unknown
Wessex Water · River Avon (via SWS)
Questions about Bristol Hollyguest Road O/S 16
- Who operates Bristol Hollyguest Road O/S 16?
- Wessex Water is the operator named in the annual record. The permit reference is Permit applied for.
- Where does Bristol Hollyguest Road O/S 16 discharge?
- The source names River Avon as the receiving water. This does not show how far a discharge travelled.
- How many times did Bristol Hollyguest Road O/S 16 spill in 2025?
- The 2025 return records 4 counted spill events and 0.6 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 Bristol Hollyguest Road O/S 16 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 Bristol Hollyguest Road O/S 16?
- 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 Bristol Hollyguest Road O/S 16 compare with other overflows?
- Bristol Hollyguest Road O/S 16 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 Wessex Water overflows it ranks 897th of 1,332; the median Wessex Water overflow recorded 11 spills. On the Bristol Avon (By Bk to Netham Weir) waterbody it ranks 90th of 126. 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.