Brent Mill CSO South Brent
Storm overflow operated by South West Water. The source names River Avon as the receiving water.
- 36
- Spills in 2025
- 129.4
- Recorded hours
- 97.3%
- Monitor operation
- 5
- Years listed
The reported spill count was 20 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Brent Mill CSO South Brent recorded 36 spills in 2025. That is more than 79% of the 14,239 overflows in England with a reported figure, and ranks 2,801st nationally. Among South West Water overflows it ranks 475th of 1,357; the median South West Water overflow recorded 21 spills. On the Avon - Upper waterbody it ranks 3rd of 4.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 36 | 129.4 |
| England | 2,801st of 14,239 | 11 | 22.3 |
| South West Water | 475th of 1,357 | 21 | 39.4 |
| Avon - Upper | 3rd of 4 | 51 | 307 |
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 | 36 | 129.4 hours | 97.3% | Official data |
| 2024 | 56 | 157 hours | 97.8% | Official data |
| 2023 | 42 | 179 hours | 68.8%Low coverage | Official data |
| 2022 | 24 | 92.6 hours | 59%Low coverage | Official data |
| 2021 | 26 | 52.8 hours | 85%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
- South West Water
- Outlet type
- Storm overflow on the sewer network
- Permit
- 201720
- Activity reference
- A1
- Grid reference
- SX69735962
- Waterbody ID
- GB108046004940Official waterbody record ↗
- Location source
- Official annual grid reference
- Location precision
- About 10 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 0.5 km south-west of the South 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
- South Brent STW So South BrentCurrent status unknown
South West Water · River Avon
- Heather Park Pscsoeo South BrentCurrent status unknown
South West Water · Tributary of Horse Brook via SWS
- Cornwood Spst Pscsoeo LuttonCurrent status unknown
South West Water · River Yealm (S)
- Holne STW So HolneCurrent status unknown
South West Water · Holy Brook
Questions about Brent Mill CSO South Brent
- Who operates Brent Mill CSO South Brent?
- South West Water is the operator named in the annual record. The permit reference is 201720.
- Where does Brent Mill CSO South Brent discharge?
- The source names River Avon as the receiving water. This does not show how far a discharge travelled.
- How many times did Brent Mill CSO South Brent spill in 2025?
- The 2025 return records 36 counted spill events and 129.4 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 97.3% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Brent Mill CSO South Brent 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 10 metres. It shows the recorded outlet position, not the extent of any discharge.
- What kind of outlet is Brent Mill CSO South Brent?
- 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 Brent Mill CSO South Brent compare with other overflows?
- Brent Mill CSO South Brent recorded 36 spills in 2025. That is more than 79% of the 14,239 overflows in England with a reported figure, and ranks 2,801st nationally. Among South West Water overflows it ranks 475th of 1,357; the median South West Water overflow recorded 21 spills. On the Avon - Upper waterbody it ranks 3rd of 4. 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.