North West Norfolk

Polluted by sewage 306 times in 2025 lasting 711 hours

Monitoring fell below 50% in some locations so could be more

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Live data for North West Norfolk in 2026

So far this year (as of 25 Oct 2026, 14:15) there has been 759 hours of sewage overflows, from 54 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Sewage without rain in North West Norfolk

On 11 occasions since December 2024, no rain fell anywhere in North West Norfolk for days — and its CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s discharged anyway.

22 Mar 2025 4 at once · 4h 10 Jan 2025 1 at once · 1h 27 Aug 2025 3 at once · 1h

Totals for North West Norfolk in 2025

23 Sites polluted by Anglian Water
306 sewage dumps
711 hours duration
Sewage pollution map of North West Norfolk
Sewage pollution map of North West Norfolk: 306 spills in 2025, lasting 711 hours, by Anglian Water
That's 4.23 weeks. 5.9 times a week, on average

Change Over Time

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Waterways in North West Norfolk

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Pollution Summary 2025

Here are all the reported sewage overflow totals for North West Norfolk in 2025. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 1 of the total 26 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Anglian Water Tidal River Great Ouse KING'S LYNN TUNNEL PS 75 178 100
Anglian Water Watery Lane Drain GRIMSTON WATER RECYCLING CENTRE 9 99 100
Anglian Water Culverted Section Of Gaywood R KINGS LYNN-MILLFLEET SO2 CSO 46 92 98.3
Anglian Water Tidal River Great Ouse KINGS LYNN GAYWOOD CSO 14 90 100
Anglian Water Tidal Great River Ouse KINGS LYNN - GAYWOOD OUTFALL 2 CSO 13 90 100
Anglian Water Culverted Section Of Gaywood R KINGS LYNN-MILLFLEET SO3 CSO 32 55 19.1
Anglian Water Culverted Section Of Gaywood SO AT MILLFLEET 33 23 96.1
Anglian Water Great Ouse KING'S LYNN PURFLEET QUAY PS 25 21 95.6
Anglian Water Culverted Section Of Gaywood R KINGS LYNN - MILLFLEET SO1 CSO 20 19 97.8
Anglian Water River Hun HUNSTANTON SMUGGLERS LANE PS 14 16 100
Anglian Water Tidal River Nene WISBECH(WEST WALTON)STW 3 12 100
Anglian Water Rudham Stream, River Wensum EAST RUDHAM PUMPING STATION 2 3 100
Anglian Water Boathouse Creek DERSINGHAM M'BATTON RD PS(F) 1 2 96.3
Anglian Water Tidal River Nar KINGS-LYNN-FRIARS CSO 4 2 98.9
Anglian Water Wash HUNSTANTON SOUTH END ROAD TPS 2 1 100
Anglian Water Tidal River Great Ouse KINGS LYNN - FERRY STREET CSO 2 1 99.9
Anglian Water Tidal River Great Ouse KINGS LYNN WATER LANE CSO 3 1 97
Anglian Water Tidal River Great Ouse KINGS LYNN TUESDAY MARKET PLACE CSO 2 0 99
Anglian Water West Lynn Drain ST PETERS RD (N) PS 2 0 100
Anglian Water West Lynn Drain KINGS LYNN - SAMPHIRE PLACE PS 1 0 100
Anglian Water Tidal River Great Ouse KINGS LYNN PAGESTAIR LANE CSO 1 0 98
Anglian Water Gaywood River KINGS LYNN-HIGHGATE CSO 1 0 100
Anglian Water River Burn BURNHAM MARKET WATER RECYCLING CTR 1 0 100
Anglian Water Boathouse Creek INGOLDISTHORPE - SANDY LANE TPS 0 0 100
Anglian Water River Ingol INGOLDISTHORPE WRC 0 0 99.9
Anglian Water Tidal River Great Ouse KINGS LYNN WRC 0 0 100

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

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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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