Sewage Map

Norwich Cedar Road Combined Sewer Overflow

Storm overflow operated by Anglian Water. The source names The River Wensum as the receiving water.

11
Spills in 2025
96.2
Recorded hours
18.9%
Monitor operation
5
Years listed
Current status unknown

Checking the latest monitor report…

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How it compares in 2025

Norwich Cedar Road Combined Sewer Overflow recorded 11 spills in 2025. That is more than 49% of the 14,239 overflows in England with a reported figure, and ranks 6,918th nationally. Among Anglian Water overflows it ranks 478th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Wensum DS Norwich waterbody it ranks 6th of 23.

The monitor worked for 18.9% of 2025, so this count may be low and its rank may understate activity.

GroupRank by spillsMedian spillsMedian hours
This outlet–1196.2
England6,918th of 14,2391122.3
Anglian Water478th of 1,438613.5
Wensum DS Norwich6th of 2361.3

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

332021352022142023312024112025
From 2021 to 2025, the reported count went from 33 to 11 spills. The highest count was 35 in 2022 and the lowest was 11 in 2025. The monitor worked for less than 90% of 2023, 2025, so those counts may be low.Amber bars mark years when the monitor worked for less than 90% of the year.
YearSpillsDurationMonitor operationSource
20251196.2 hours18.9%Low coverageOfficial data
2024317.5 hours100%Official data
2023143.8 hours55.7%Low coverageOfficial data
2022357.5 hours100%Official data
202133101.8 hours98.9%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
Anglian Water
Outlet type
Storm overflow on the sewer network
Permit
EPREB3296EH
Activity reference
A1
Grid reference
TG2406707669
Waterbody ID
GB105034055882Official 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 “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 1.2 km north-west of the Trowse Newton 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 Norwich Cedar Road Combined Sewer Overflow

Who operates Norwich Cedar Road Combined Sewer Overflow?
Anglian Water is the operator named in the annual record. The permit reference is EPREB3296EH.
Where does Norwich Cedar Road Combined Sewer Overflow discharge?
The source names The River Wensum as the receiving water. This does not show how far a discharge travelled.
How many times did Norwich Cedar Road Combined Sewer Overflow spill in 2025?
The 2025 return records 11 counted spill events and 96.2 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 18.9% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Norwich Cedar Road Combined Sewer Overflow 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 Norwich Cedar Road Combined Sewer Overflow?
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 Norwich Cedar Road Combined Sewer Overflow compare with other overflows?
Norwich Cedar Road Combined Sewer Overflow recorded 11 spills in 2025. That is more than 49% of the 14,239 overflows in England with a reported figure, and ranks 6,918th nationally. Among Anglian Water overflows it ranks 478th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Wensum DS Norwich waterbody it ranks 6th of 23. 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.