Malmesbury Parliament Row
Storm overflow operated by Wessex Water. The source names River Avon (Sherston Branch) as the receiving water.
- 7
- Spills in 2025
- 5.1
- Recorded hours
- 93.9%
- Monitor operation
- 4
- Years listed
The reported spill count was 13 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Malmesbury Parliament Row recorded 7 spills in 2025. That is more than 40% of the 14,239 overflows in England with a reported figure, and ranks 8,130th nationally. Among Wessex Water overflows it ranks 774th of 1,332; the median Wessex Water overflow recorded 11 spills. On the Sherston Avon waterbody it ranks 6th of 8.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 7 | 5.1 |
| England | 8,130th of 14,239 | 11 | 22.3 |
| Wessex Water | 774th of 1,332 | 11 | 18.9 |
| Sherston Avon | 6th of 8 | 16 | 8.6 |
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 | 7 | 5.1 hours | 93.9% | Official data |
| 2024 | 20 | 18.4 hours | 99.7% | Official data |
| 2023 | 23 | 19.4 hours | 99.8% | Official data |
| 2022 | Unknown | Unknown | Unknown | 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
- EPRJB3797NC
- Activity reference
- 1-STORM OVERFLOW
- Grid reference
- ST9353486763
- Waterbody ID
- GB109053027690Official 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 0.9 km south-east of the Malmesbury 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
- Malmesbury Lower High StreetCurrent status unknown
Wessex Water · Sherston Avon
- Malmesbury St Johns StreetCurrent status unknown
Wessex Water · River Avon (Tetbury Branch)
- Malmesbury Burton HillCurrent status unknown
Wessex Water · Tributary of River Avon(S)
- Malmesbury Harpers LaneCurrent status unknown
Wessex Water · River Avon (Sherston Branch)
Questions about Malmesbury Parliament Row
- Who operates Malmesbury Parliament Row?
- Wessex Water is the operator named in the annual record. The permit reference is EPRJB3797NC.
- Where does Malmesbury Parliament Row discharge?
- The source names River Avon (Sherston Branch) as the receiving water. This does not show how far a discharge travelled.
- How many times did Malmesbury Parliament Row spill in 2025?
- The 2025 return records 7 counted spill events and 5.1 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 93.9% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Malmesbury Parliament Row 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 Malmesbury Parliament Row?
- 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 Malmesbury Parliament Row compare with other overflows?
- Malmesbury Parliament Row recorded 7 spills in 2025. That is more than 40% of the 14,239 overflows in England with a reported figure, and ranks 8,130th nationally. Among Wessex Water overflows it ranks 774th of 1,332; the median Wessex Water overflow recorded 11 spills. On the Sherston Avon waterbody it ranks 6th of 8. 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.