Crowndale CSO Tavistock

Storm overflow operated by South West Water. The source names Tributary of the River Tavy as the receiving water.

72
Spills in 2025: 815.5
Recorded hours: 74.9%
Monitor operation: 5
Years listed

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Crowndale CSO Tavistock recorded 72 spills in 2025. That is more than 94% of the 14,239 overflows in England with a reported figure, and ranks 710th nationally. Among South West Water overflows it ranks 202nd of 1,357; the median South West Water overflow recorded 21 spills. On the Lower River Tavy waterbody it ranks 3rd of 11.

The monitor worked for 74.9% of 2025, so this count may be low and its rank may understate activity.

Group	Rank by spills	Median spills	Median hours
This outlet	–	72	815.5
England	710th of 14,239	11	22.3
South West Water	202nd of 1,357	21	39.4
Lower River Tavy	3rd of 11	52	121.7

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 76 to 72 spills. The highest count was 76 in 2021 and the lowest was 36 in 2022. The monitor worked for less than 90% of 2021, 2022, 2024, 2025, 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	72	815.5 hours	74.9%Low coverage	Official data
2024	60	229.4 hours	82.9%Low coverage	Official data
2023	Unknown	Unknown	0%Low coverage	Official data
2022	36	210.6 hours	36%Low coverage	Official data
2021	76	347.3 hours	81%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: 301885
Activity reference: A1
Grid reference: SX47377257
Waterbody ID: GB108047007840Official 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 1.6 km south-west of the Tavistock reference point in the ONS built-up areas data.

Area and water pages

Lower River Tavy waterbody →

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

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Current status unknown

Questions about Crowndale CSO Tavistock

Who operates Crowndale CSO Tavistock?: South West Water is the operator named in the annual record. The permit reference is 301885.
Where does Crowndale CSO Tavistock discharge?: The source names Tributary of the River Tavy as the receiving water. This does not show how far a discharge travelled.
How many times did Crowndale CSO Tavistock spill in 2025?: The 2025 return records 72 counted spill events and 815.5 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 74.9% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Crowndale CSO Tavistock 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 Crowndale CSO Tavistock?: 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 Crowndale CSO Tavistock compare with other overflows?: Crowndale CSO Tavistock recorded 72 spills in 2025. That is more than 94% of the 14,239 overflows in England with a reported figure, and ranks 710th nationally. Among South West Water overflows it ranks 202nd of 1,357; the median South West Water overflow recorded 21 spills. On the Lower River Tavy waterbody it ranks 3rd of 11. 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.