Dorchester Princes Bridge
Storm overflow operated by Wessex Water. The source names (S) Mill Stream as the receiving water.
- 3
- Spills in 2025
- 24.5
- Recorded hours
- 100%
- Monitor operation
- 4
- Years listed
The reported spill count was 4 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Dorchester Princes Bridge recorded 3 spills in 2025. That is more than 26% of the 14,239 overflows in England with a reported figure, and ranks 9,843rd nationally. Among Wessex Water overflows it ranks 933rd of 1,332; the median Wessex Water overflow recorded 11 spills. On the Frome Dorset (Lower) u/s Louds Mill Dorchester waterbody it ranks 6th of 8.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 3 | 24.5 |
| England | 9,843rd of 14,239 | 11 | 22.3 |
| Wessex Water | 933rd of 1,332 | 11 | 18.9 |
| Frome Dorset (Lower) u/s Louds Mill Dorchester | 6th of 8 | 17 | 38.8 |
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 | 3 | 24.5 hours | 100% | Official data |
| 2024 | 7 | 23.3 hours | 100% | Official data |
| 2023 | 10 | 101.5 hours | 100% | Official data |
| 2022 | 0 | 0 hours | 89.7%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
- 400684
- Activity reference
- 1-STORM OVERFLOW
- Grid reference
- SY7001090590
- Waterbody ID
- GB108044009691Official 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 1.3 km east of the Dorchester (Dorset) 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
- Fordington High Street No 97Current status unknown
Wessex Water · (S) Mill Stream
- Dorchester Kings Road No 35Current status unknown
Wessex Water · Mill Stream via SWS
- Fordington High Street No 16Current status unknown
Wessex Water · Dorchester Mill Stream
- Dorchester South Walks / South StreetCurrent status unknown
Wessex Water · River Frome via SWS
Questions about Dorchester Princes Bridge
- Who operates Dorchester Princes Bridge?
- Wessex Water is the operator named in the annual record. The permit reference is 400684.
- Where does Dorchester Princes Bridge discharge?
- The source names (S) Mill Stream as the receiving water. This does not show how far a discharge travelled.
- How many times did Dorchester Princes Bridge spill in 2025?
- The 2025 return records 3 counted spill events and 24.5 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 Dorchester Princes Bridge 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 Dorchester Princes Bridge?
- 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 Dorchester Princes Bridge compare with other overflows?
- Dorchester Princes Bridge recorded 3 spills in 2025. That is more than 26% of the 14,239 overflows in England with a reported figure, and ranks 9,843rd nationally. Among Wessex Water overflows it ranks 933rd of 1,332; the median Wessex Water overflow recorded 11 spills. On the Frome Dorset (Lower) u/s Louds Mill Dorchester 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.