Sewage Map

Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405)

Storm overflow operated by Northumbrian Water. The source names Valley Burn as the receiving water.

41
Spills in 2025
169.3
Recorded hours
77.9%
Monitor operation
6
Years listed
Current status unknown

Checking the latest monitor report…

Open official annual data ↗

How it compares in 2025

Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405) recorded 41 spills in 2025. That is more than 83% of the 14,239 overflows in England with a reported figure, and ranks 2,313th nationally. Among Northumbrian Water overflows it ranks 191st of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Wear from Gaunless to Browney waterbody it ranks 5th of 30.

The monitor worked for 77.9% of 2025, so this count may be low and its rank may understate activity.

GroupRank by spillsMedian spillsMedian hours
This outlet–41169.3
England2,313th of 14,2391122.3
Northumbrian Water191st of 1,5591115.6
Wear from Gaunless to Browney5th of 301012.4

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

462020652021542022552023492024412025
From 2020 to 2025, the reported count went from 46 to 41 spills. The highest count was 65 in 2021 and the lowest was 41 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
202541169.3 hours77.9%Low coverageOfficial data
202449231.9 hours99.3%Official data
202355264 hours100%Official data
202254142 hours100%Official data
202165232.3 hours100%Official data
202046171.1 hours100%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
Northumbrian Water
Outlet type
Inlet storm overflow at a wastewater treatment works
Permit
243/0985
Activity reference
A3
Grid reference
NZ2422735898
Waterbody ID
GB103024077464Official 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 “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.

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 2.5 km north-west of the Spennymoor 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 Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405)

Who operates Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405)?
Northumbrian Water is the operator named in the annual record. The permit reference is 243/0985.
Where does Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405) discharge?
The source names Valley Burn as the receiving water. This does not show how far a discharge travelled.
How many times did Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405) spill in 2025?
The 2025 return records 41 counted spill events and 169.3 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 77.9% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405) 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 Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405)?
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 Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405) compare with other overflows?
Tudhoe Mill Sewage Treatment Works, Northumbrian Water (243/0985 · A3 · NWL01405) recorded 41 spills in 2025. That is more than 83% of the 14,239 overflows in England with a reported figure, and ranks 2,313th nationally. Among Northumbrian Water overflows it ranks 191st of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Wear from Gaunless to Browney waterbody it ranks 5th of 30. 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.