Sewage Map

Fir Tree STW

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

56
Spills in 2025
555.7
Recorded hours
97.6%
Monitor operation
5
Years listed

The reported spill count was 52 lower than in 2024. This compares event counts, not discharge volume.

Current status unknown

Checking the latest monitor report…

Open official annual data ↗

How it compares in 2025

Fir Tree STW recorded 56 spills in 2025. That is more than 90% of the 14,239 overflows in England with a reported figure, and ranks 1,296th nationally. Among Northumbrian Water overflows it ranks 84th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Wear from Houselop Beck to Beechburn Beck waterbody it ranks 2nd of 6.

GroupRank by spillsMedian spillsMedian hours
This outlet–56555.7
England1,296th of 14,2391122.3
Northumbrian Water84th of 1,5591115.6
Wear from Houselop Beck to Beechburn Beck2nd of 648508.1

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/a202211820231082024562025
From 2023 to 2025, the reported count went from 118 to 56 spills. The highest count was 118 in 2023 and the lowest was 56 in 2025.Amber bars mark years when the monitor worked for less than 90% of the year.
YearSpillsDurationMonitor operationSource
202556555.7 hours97.6%Official data
2024108939.3 hours99.9%Official data
20231181,241.8 hours92.3%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
241/1013
Activity reference
A2
Grid reference
NZ1368934172
Waterbody ID
GB103024077462Official 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 2.8 km north of the Witton-le-Wear 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 Fir Tree STW

Who operates Fir Tree STW?
Northumbrian Water is the operator named in the annual record. The permit reference is 241/1013.
Where does Fir Tree STW discharge?
The source names Wadley Burn as the receiving water. This does not show how far a discharge travelled.
How many times did Fir Tree STW spill in 2025?
The 2025 return records 56 counted spill events and 555.7 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 97.6% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
Is Fir Tree 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 Fir Tree 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 Fir Tree STW compare with other overflows?
Fir Tree STW recorded 56 spills in 2025. That is more than 90% of the 14,239 overflows in England with a reported figure, and ranks 1,296th nationally. Among Northumbrian Water overflows it ranks 84th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Wear from Houselop Beck to Beechburn Beck waterbody it ranks 2nd of 6. 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.