Antony S T Septnk So Antony

Storm overflow operated by South West Water. The source names River Lynher Estuary as the receiving water.

64
Spills in 2025: 133.8
Recorded hours: 98.1%
Monitor operation: 3
Years listed

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Antony S T Septnk So Antony recorded 64 spills in 2025. That is more than 93% of the 14,239 overflows in England with a reported figure, and ranks 947th nationally. Among South West Water overflows it ranks 249th of 1,357; the median South West Water overflow recorded 21 spills.

Group	Rank by spills	Median spills	Median hours
This outlet	–	64	133.8
England	947th of 14,239	11	22.3
South West Water	249th 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 2023 to 2025, the reported count went from 130 to 64 spills. The highest count was 130 in 2023 and the lowest was 64 in 2025. The monitor worked for less than 90% of 2024, so that count 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	64	133.8 hours	98.1%	Official data
2024	71	304.3 hours	76.4%Low coverage	Official data
2023	130	591.6 hours	93.6%	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: Inlet storm overflow at a wastewater treatment works
Permit: NRA-SW-1004
Activity reference: A1
Grid reference: SX39845480
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 “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.

Where it is

The recorded position is about 3.4 km west of the Torpoint reference point in the ONS built-up areas data.

Designated bathing waters within 3 km in a straight line:

Sharrow2.7 km

Distance does not show that water from this outlet reaches a bathing water. Check the official bathing-water profile for its classification and advice.

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.

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Other outlet records nearby

St John S T Septnk So St John
South West Water · St Johns Leat (E)
Current status unknown

Torpoint STW So Torpoint
South West Water · St John'S Lake (Estuarine)
Current status unknown
Sheviock S T Septnk So Sheviock
South West Water · River Lynher
Current status unknown
Daws Ln CSO Millbrook
South West Water · Millbrook via SWS
Current status unknown

Questions about Antony S T Septnk So Antony

Who operates Antony S T Septnk So Antony?: South West Water is the operator named in the annual record. The permit reference is NRA-SW-1004.
Where does Antony S T Septnk So Antony discharge?: The source names River Lynher Estuary as the receiving water. This does not show how far a discharge travelled.
How many times did Antony S T Septnk So Antony spill in 2025?: The 2025 return records 64 counted spill events and 133.8 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 98.1% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
Is Antony S T Septnk So Antony 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 Antony S T Septnk So Antony?: 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 Antony S T Septnk So Antony compare with other overflows?: Antony S T Septnk So Antony recorded 64 spills in 2025. That is more than 93% of the 14,239 overflows in England with a reported figure, and ranks 947th nationally. Among South West Water overflows it ranks 249th 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.