Sewage Map

Stalham STW

Storm overflow operated by Anglian Water. The source names The River Ant & Tributary as the receiving water.

2
Spills in 2025
7.2
Recorded hours
86.3%
Monitor operation
5
Years listed
Current status unknown

Checking the latest monitor report…

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How it compares in 2025

Stalham STW recorded 2 spills in 2025. That is more than 21% of the 14,239 overflows in England with a reported figure, and ranks 10,428th nationally. Among Anglian Water overflows it ranks 959th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Ant (Dilham to R. Bure) waterbody it ranks 3rd of 3.

The monitor worked for 86.3% of 2025, so this count may be low and its rank may understate activity.

GroupRank by spillsMedian spillsMedian hours
This outlet–27.2
England10,428th of 14,2391122.3
Anglian Water959th of 1,438613.5
Ant (Dilham to R. Bure)3rd of 337.2

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/a202121202220202334202422025
From 2022 to 2025, the reported count went from 21 to 2 spills. The highest count was 34 in 2024 and the lowest was 2 in 2025. The monitor worked for less than 90% of 2025, so that count may be low.Amber bars mark years when the monitor worked for less than 90% of the year.
YearSpillsDurationMonitor operationSource
202527.2 hours86.3%Low coverageOfficial data
202434341.2 hours100%Official data
202320171 hours100%Official data
202221367.8 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
Anglian Water
Outlet type
Storm tank at a wastewater treatment works
Permit
AEENF/1312
Activity reference
A2
Grid reference
TG3576025110
Waterbody ID
GB105034051330Official waterbody record ↗
Location source
Official annual grid reference
Location precision
About 1 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.

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 1.8 km west of the Stalham 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 Stalham STW

Who operates Stalham STW?
Anglian Water is the operator named in the annual record. The permit reference is AEENF/1312.
Where does Stalham STW discharge?
The source names The River Ant & Tributary as the receiving water. This does not show how far a discharge travelled.
How many times did Stalham STW spill in 2025?
The 2025 return records 2 counted spill events and 7.2 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 86.3% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Stalham STW 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 1 metres. It shows the recorded outlet position, not the extent of any discharge.
What kind of outlet is Stalham STW?
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 Stalham STW compare with other overflows?
Stalham STW recorded 2 spills in 2025. That is more than 21% of the 14,239 overflows in England with a reported figure, and ranks 10,428th nationally. Among Anglian Water overflows it ranks 959th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Ant (Dilham to R. Bure) waterbody it ranks 3rd of 3. 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.