Opp 447 Wolseley Rd CSO Plymouth

Storm overflow operated by South West Water. The source names Weston Mill Stream(E) as the receiving water.

43
Spills in 2025: 533.7
Recorded hours: 100%
Monitor operation: 5
Years listed

The reported spill count was 31 lower than in 2024. This compares event counts, not discharge volume.

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Opp 447 Wolseley Rd CSO Plymouth recorded 43 spills in 2025. That is more than 84% of the 14,239 overflows in England with a reported figure, and ranks 2,156th nationally. Among South West Water overflows it ranks 403rd of 1,357; the median South West Water overflow recorded 21 spills.

Group	Rank by spills	Median spills	Median hours
This outlet	–	43	533.7
England	2,156th of 14,239	11	22.3
South West Water	403rd of 1,357	21	39.4

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

From 2021 to 2025, the reported count went from 26 to 43 spills. The highest count was 74 in 2024 and the lowest was 26 in 2021. The monitor worked for less than 90% of 2021, 2022, so those counts may be low.Amber bars mark years when the monitor worked for less than 90% of the year.

Year	Spills	Duration	Monitor operation	Source
2025	43	533.7 hours	100%	Official data
2024	74	884.5 hours	100%	Official data
2023	67	701.4 hours	100%	Official data
2022	32	445.3 hours	21%Low coverage	Official data
2021	26	220.7 hours	56%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: 302610
Activity reference: A1
Grid reference: SX45195748
Waterbody ID: Unknown
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.

Where it is

The recorded position is about 2.9 km north-east of the Torpoint reference point in the ONS built-up areas data.

Area and water pages

Plymouth area →

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 ↗

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Camels Head STW SSO Plymouth
South West Water · Weston Mill Lake(E)
Current status unknown

Questions about Opp 447 Wolseley Rd CSO Plymouth

Who operates Opp 447 Wolseley Rd CSO Plymouth?: South West Water is the operator named in the annual record. The permit reference is 302610.
Where does Opp 447 Wolseley Rd CSO Plymouth discharge?: The source names Weston Mill Stream(E) as the receiving water. This does not show how far a discharge travelled.
How many times did Opp 447 Wolseley Rd CSO Plymouth spill in 2025?: The 2025 return records 43 counted spill events and 533.7 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 Opp 447 Wolseley Rd CSO Plymouth 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 Opp 447 Wolseley Rd CSO Plymouth?: 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 Opp 447 Wolseley Rd CSO Plymouth compare with other overflows?: Opp 447 Wolseley Rd CSO Plymouth recorded 43 spills in 2025. That is more than 84% of the 14,239 overflows in England with a reported figure, and ranks 2,156th nationally. Among South West Water overflows it ranks 403rd of 1,357; the median South West Water overflow recorded 21 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.