Sewage Map

Troon 1&2 CSO Troon

Storm overflow operated by South West Water. The source names Red River (S) as the receiving water.

71
Spills in 2025
65.7
Recorded hours
100%
Monitor operation
5
Years listed

The reported spill count was 13 lower than in 2024. This compares event counts, not discharge volume.

Current status unknown

Checking the latest monitor report…

Open official annual data ↗

How it compares in 2025

Troon 1&2 CSO Troon recorded 71 spills in 2025. That is more than 94% of the 14,239 overflows in England with a reported figure, and ranks 743rd nationally. Among South West Water overflows it ranks 215th of 1,357; the median South West Water overflow recorded 21 spills. On the Roseworthy Stream waterbody it ranks 2nd of 4.

GroupRank by spillsMedian spillsMedian hours
This outlet–7165.7
England743rd of 14,2391122.3
South West Water215th of 1,3572139.4
Roseworthy Stream2nd of 466.5174.6

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

n/a202152022392023842024712025
From 2022 to 2025, the reported count went from 5 to 71 spills. The highest count was 84 in 2024 and the lowest was 5 in 2022. The monitor worked for less than 90% of 2023, so that count may be low.Amber bars mark years when the monitor worked for less than 90% of the year.
YearSpillsDurationMonitor operationSource
20257165.7 hours100%Official data
202484124.5 hours100%Official data
20233939.4 hours83.9%Low coverageOfficial data
202259.6 hours100%Official data
2021UnknownUnknownUnknownOfficial 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
301810
Activity reference
A1
Grid reference
SW65843815
Waterbody ID
GB108049000560Official 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 0.4 km west of the Troon (Cornwall) 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.

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Other outlet records nearby

Questions about Troon 1&2 CSO Troon

Who operates Troon 1&2 CSO Troon?
South West Water is the operator named in the annual record. The permit reference is 301810.
Where does Troon 1&2 CSO Troon discharge?
The source names Red River (S) as the receiving water. This does not show how far a discharge travelled.
How many times did Troon 1&2 CSO Troon spill in 2025?
The 2025 return records 71 counted spill events and 65.7 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 Troon 1&2 CSO Troon 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 Troon 1&2 CSO Troon?
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 Troon 1&2 CSO Troon compare with other overflows?
Troon 1&2 CSO Troon recorded 71 spills in 2025. That is more than 94% of the 14,239 overflows in England with a reported figure, and ranks 743rd nationally. Among South West Water overflows it ranks 215th of 1,357; the median South West Water overflow recorded 21 spills. On the Roseworthy Stream waterbody it ranks 2nd 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.