It's a Dirty Business

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South Norfolk - 2025 Sewage

Polluted by sewage 3,779 hours in 2025 , monitoring offline 4,453 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in South Norfolk for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Constituencies near South Norfolk

Daily Data

Jan - 35 hours
Feb - 88 hours
Mar - 0 hours
Apr - 0 hours
May - 8 hours
Jun - 3 hours
Jul - 32 hours , 253 offline
Aug - 33 hours , 744 offline
Sept - 1 hours , 720 offline
Oct - 1 hours , 744 offline
Nov - 2,755 hours , 1,114 offline
Dec - 818 hours , 853 offline
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Anglian Water ASHWELLTHORPE STW Wreningham Stream River Tas N 32 571 h 57m -
Anglian Water LONG STRATTON STW River Tas 29 554 h 5m -
Anglian Water WYMONDHAM STW River Tiffey 26 552 h 57m -
Anglian Water FORNCETT-FORNCETT END STW River Tas 29 538 h 57m -
Anglian Water LODDON-KNAPPS BRIDGE SP River Chet 26 514 h 16m -
Anglian Water SISLAND STW River Chet 23 506 h 15m -
Anglian Water ASHWELLTHORPE STW Wreningham Stream River Tas N 14 224 h 30m -
Anglian Water FORNCETT-FORNCETT END STW River Tas 7 88 h 58m -
Anglian Water LONG STRATTON STW River Tas 7 74 h 5m -
Anglian Water WYMONDHAM STW River Tiffey 6 73 h 46m -
Anglian Water SISLAND STW River Chet 5 50 h 59m -
Anglian Water LODDON-KNAPPS BRIDGE SP River Chet 2 10 h -
Anglian Water SWARDESTON-THE COMMON TPS Main Idb River Yare 5 6 h 29m -
Anglian Water Whitlingham Water Recycling Centre Tidal River Yare 1 4 h -
Anglian Water NEWTON FLOTMAN-MAIDS HEAD TPS River Tas 2 2 h 59m -
Anglian Water SWARDESTON-THE COMMON TPS Main Idb River Yare 2 2 h 31m 0 h
Anglian Water WYMONDHAM-LONDON RD SP River Tiffey 1 1 h 38m 3,290 h
Anglian Water SAXLINGHAM STW River Tas 3 0 h 59m -
Anglian Water Wymondham - Station Road Pumping Station River Tiffey 0 0 h -
Anglian Water SWARDESTON-COMMON STW Intwood Stream River Yare 0 0 h -
Anglian Water NEWTON FLOTMAN-MAIDS HEAD TPS River Tas 0 0 h -
Anglian Water SAXLINGHAM STW River Tas 0 0 h -
Anglian Water THURLTON-THE STREET TPS Boyes Dyke 0 0 h -
Anglian Water WYMONDHAM-LONDON RD SP River Tiffey 0 0 h 1,162 h
Anglian Water Wymondham - Station Road Pumping Station River Tiffey 0 0 h -
Anglian Water Whitlingham Water Recycling Centre Tidal River Yare 0 0 h -
Anglian Water SWARDESTON-COMMON STW Intwood Stream River Yare 0 0 h -

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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