Ashprington STW SSO Ashprington

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

19
Spills in 2025: 28.7
Recorded hours: 97.1%
Monitor operation: 5
Years listed

The reported spill count was 11 lower than in 2024. This compares event counts, not discharge volume.

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Ashprington STW SSO Ashprington recorded 19 spills in 2025. That is more than 62% of the 14,239 overflows in England with a reported figure, and ranks 5,217th nationally. Among South West Water overflows it ranks 709th of 1,357; the median South West Water overflow recorded 21 spills.

Group	Rank by spills	Median spills	Median hours
This outlet	–	19	28.7
England	5,217th of 14,239	11	22.3
South West Water	709th 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 69 to 19 spills. The highest count was 69 in 2021 and the lowest was 19 in 2025. 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.

Year	Spills	Duration	Monitor operation	Source
2025	19	28.7 hours	97.1%	Official data
2024	30	142.4 hours	99.5%	Official data
2023	44	375.7 hours	84.6%Low coverage	Official data
2022	38	35.7 hours	99%	Official data
2021	69	88.9 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: South West Water
Outlet type: Storm tank at a wastewater treatment works
Permit: NRA-SW-3983
Activity reference: A2
Grid reference: SX81485636
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 “Storm tank at WwTW”: storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.

Where it is

The recorded position is about 3.5 km west of the Stoke Gabriel reference point in the ONS built-up areas data.

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

Ashprington STW So Ashprington
South West Water · River Harbourne (Estuarine)
Current status unknown

Tuckenhay Bridge SPS Pscsoeo Tuckenhay
South West Water · River Wash (S)
Current status unknown
Cornworthy STW SSO Dartmouth
South West Water · Tributary of the Dart Estuary
Current status unknown
Harbertonford STW SSO Harbertonford
South West Water · Harbourne River
Current status unknown

Questions about Ashprington STW SSO Ashprington

Who operates Ashprington STW SSO Ashprington?: South West Water is the operator named in the annual record. The permit reference is NRA-SW-3983.
Where does Ashprington STW SSO Ashprington discharge?: The source names River Harbourne (Estuarine) as the receiving water. This does not show how far a discharge travelled.
How many times did Ashprington STW SSO Ashprington spill in 2025?: The 2025 return records 19 counted spill events and 28.7 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 97.1% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
Is Ashprington STW SSO Ashprington 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 Ashprington STW SSO Ashprington?: The annual return lists the asset type as “Storm tank at WwTW”, which means storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.
How does Ashprington STW SSO Ashprington compare with other overflows?: Ashprington STW SSO Ashprington recorded 19 spills in 2025. That is more than 62% of the 14,239 overflows in England with a reported figure, and ranks 5,217th nationally. Among South West Water overflows it ranks 709th 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.