Sewage Map

Nenthead STW

Storm overflow operated by Northumbrian Water. The source names River Nent as the receiving water.

84
Spills in 2025
986.3
Recorded hours
76%
Monitor operation
5
Years listed
Current status unknown

Checking the latest monitor report…

Open official annual data ↗

How it compares in 2025

Nenthead STW recorded 84 spills in 2025. That is more than 96% of the 14,239 overflows in England with a reported figure, and ranks 433rd nationally. Among Northumbrian Water overflows it ranks 23rd of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Nent from Source to South Tyne waterbody it ranks 1st of 4.

The monitor worked for 76% of 2025, so this count may be low and its rank may understate activity.

GroupRank by spillsMedian spillsMedian hours
This outlet–84986.3
England433rd of 14,2391122.3
Northumbrian Water23rd of 1,5591115.6
Nent from Source to South Tyne1st of 42751.5

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/a2021n/a202213020231092024842025
From 2023 to 2025, the reported count went from 130 to 84 spills. The highest count was 130 in 2023 and the lowest was 84 in 2025. The monitor worked for less than 90% of 2024, 2025, so those counts may be low.Amber bars mark years when the monitor worked for less than 90% of the year.
YearSpillsDurationMonitor operationSource
202584986.3 hours76%Low coverageOfficial data
20241091,722.8 hours76.4%Low coverageOfficial data
20231301,903 hours93.1%Official data
2022UnknownUnknown0%Low coverageOfficial data
2021UnknownUnknown0%Low coverageOfficial 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
Storm tank at a wastewater treatment works
Permit
232/1097
Activity reference
A2
Grid reference
NY7768144305
Waterbody ID
GB103023075420Official 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 6.1 km east of the Alston 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.

Open official source ↗

Other outlet records nearby

Questions about Nenthead STW

Who operates Nenthead STW?
Northumbrian Water is the operator named in the annual record. The permit reference is 232/1097.
Where does Nenthead STW discharge?
The source names River Nent as the receiving water. This does not show how far a discharge travelled.
How many times did Nenthead STW spill in 2025?
The 2025 return records 84 counted spill events and 986.3 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 76% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Nenthead 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 Nenthead 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 Nenthead STW compare with other overflows?
Nenthead STW recorded 84 spills in 2025. That is more than 96% of the 14,239 overflows in England with a reported figure, and ranks 433rd nationally. Among Northumbrian Water overflows it ranks 23rd of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Nent from Source to South Tyne waterbody it ranks 1st of 4. 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.