SUTTON MONTIS - Sewage Treatment Works
Storm overflow operated by Wessex Water. The source names Hornsey Brook as the receiving water.
- 27
- Spills in 2025
- 177.5
- Recorded hours
- 100%
- Monitor operation
- 1
- Years listed
We do not have a live report for this outlet. Its annual spill records are shown below.
How it compares in 2025
SUTTON MONTIS - Sewage Treatment Works recorded 27 spills in 2025. That is more than 71% of the 14,239 overflows in England with a reported figure, and ranks 3,910th nationally. Among Wessex Water overflows it ranks 333rd of 1,332; the median Wessex Water overflow recorded 11 spills.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 27 | 177.5 |
| England | 3,910th of 14,239 | 11 | 22.3 |
| Wessex Water | 333rd of 1,332 | 11 | 18.9 |
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 | 27 | 177.5 hours | 100% | 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
- Inlet storm overflow at a wastewater treatment works
- Permit
- Unpermitted
- Activity reference
- Unknown
- Grid reference
- ST6183223896
- Waterbody ID
- GB108052015640Official 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 “Inlet SO at WwTW”: inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
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 2.4 km east of the Queen Camel 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
- Sparkford Off Sparkford Hill Lane InletCurrent status unknown
Wessex Water · The River Cam
- Queen Camel Mildmay Place In The Rear Garden Of Mildmay OrchardCurrent status unknown
Wessex Water · River Cam
- South CadburyCurrent status unknown
Wessex Water · Tributary of River Cam (S)
- Queen Camel Englands Mead Green LaneCurrent status unknown
Wessex Water · River Cam
Questions about SUTTON MONTIS - Sewage Treatment Works
- Who operates SUTTON MONTIS - Sewage Treatment Works?
- Wessex Water is the operator named in the annual record. The permit reference is Unpermitted.
- Where does SUTTON MONTIS - Sewage Treatment Works discharge?
- The source names Hornsey Brook as the receiving water. This does not show how far a discharge travelled.
- How many times did SUTTON MONTIS - Sewage Treatment Works spill in 2025?
- The 2025 return records 27 counted spill events and 177.5 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 SUTTON MONTIS - Sewage Treatment Works discharging right now?
- This record is not matched to a company live feed, so we cannot show a current report. Only the annual figures are available for this outlet.
- 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 SUTTON MONTIS - Sewage Treatment Works?
- The annual return lists the asset type as “Inlet SO at WwTW”, which means inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
- How does SUTTON MONTIS - Sewage Treatment Works compare with other overflows?
- SUTTON MONTIS - Sewage Treatment Works recorded 27 spills in 2025. That is more than 71% of the 14,239 overflows in England with a reported figure, and ranks 3,910th nationally. Among Wessex Water overflows it ranks 333rd of 1,332; the median Wessex Water overflow recorded 11 spills. 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.