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South Northamptonshire

Polluted by sewage 884 times in 2025 lasting 5,525 hours

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

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

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Live data for South Northamptonshire in 2026

So far this year (as of 10 Aug 2026, 21:16) there has been 10,411 hours of sewage overflows, from 133 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s - that's 1.2 years!

Totals for South Northamptonshire in 2025

53 Sites polluted by Anglian Water Thames Water
884 sewage dumps
5,525 hours duration
That's 7.67 months. On average 2.4 times a day

Change Over Time

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Waterways in South Northamptonshire

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Pollution Summary 2025

Here are all the reported sewage overflow totals for South Northamptonshire 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 64 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 Grendon Brook River Nene BOZEAT STW 60 719 94.4
Anglian Water River Tove River Gre SILVERSTONE STW 69 659 100
Anglian Water River Tove River Great Ouse N TOWCESTER WATER RECYCLING CENTRE 31 504 93.8
Anglian Water Grendon Brook EASTON MAUDIT WRC 36 359 98.6
Anglian Water Helmdon Brook River Tove HELMDON WATER RECYCLING CENTRE 25 286 99.9
Anglian Water Unknown River Nene BRAFIELD SSO 33 265 99.1
Anglian Water Of Wollaston Brook A508 ROUNDABOUT 33 251 93.9
Anglian Water Wootton Brook HACKLETON SPS 15 228 99.4
Anglian Water Hulcote Brook River Tove TIFFIELD STW 23 174 99.9
Anglian Water Dogsmouth Brook COSGROVE CSO 26 166 99
Thames Water Middleton Brook BANBURY ROAD PUMPING STATION, MIDDL 31 155 96.8
Thames Water Farthinghoestream GREATWORTH STW, GREATWORTH, NORTHAN 12 123 100
Thames Water Washle Brook MIDDLETON CHENEY WTW 13 122 100
Anglian Water Syresham Stream STORM SEWER OVERFLOW CROWFIELD PS 15 122 100
Anglian Water River Tove STOKE BRUERNE STW 19 108 100
Thames Water Ashby Brook MORETON PINKNEY WWTW 26 105 99.6
Anglian Water River Tove PAULERSPURY - CUTTLE MILL PS 21 101 100
Anglian Water Stream River Great Ouse EVENLEY STW 12 99 99.9
Anglian Water River Tove GREENS NORTON WRC 8 83 100
Anglian Water River Chater GRENDON STW 33 83 100
Thames Water Culworth Brook Culworth 10 70 99.7
Anglian Water Silverstone Brook WHITTLEBURY SEWAGE PUMPING STATION 11 69 100
Anglian Water Bugbrooke Brook BUGBROOKE WRC 21 68 99.5
Thames Water Chacombe Brook CHACOMBE STW, CHACOMBE, NORTHANTS 21 60 100
Anglian Water River Nene UNITY CLOSE SSO 28 56 97.6
Anglian Water River Nene WEEDON ROAD CSO 37 53 100
Anglian Water Denton Brook DENTON TPS (NORTHANTS) 11 49 100
Thames Water Kings Sutton Stream KINGS SUTTON STW, KINGS SUTTON, NOR 6 44 97.7
Anglian Water Salcey Brook ASHTON WATER RECYCLING CENTRE 6 38 100
Anglian Water River Nene KISLINGBURY BAPTIST CHAPEL SSO 14 38 99.3
Anglian Water Grendon Brook SSO LOWER END 27 30 99.9
Anglian Water Bugbrooke Brook BUGBROOKE SPS 6 28 99.8
Anglian Water Wootton Brook River Nene GAYTON(NORTHANTS) STW 14 26 100
Anglian Water River Nene HARPOLE - NORTHAMPTON ROAD CSO 21 24 99.9
Anglian Water River Tove HELMDON TERMINAL PUMPING STATION 2 16 100
Anglian Water River Nene KISLINGBURY PUMPING STATION 6 16 100
Anglian Water Grendon Brook YARDLEY HASTINGS STW 8 15 100
Anglian Water River Tove BENGAL LANE 3 13 88.3
Anglian Water Unknown SHUTLANGER 13 13 100
Anglian Water River Ouse BRACKLEY TERMINAL PS 9 12 100
Anglian Water Bugbrooke Brook BUGBROOKE SSO ACE LANE 4 12 97.4
Anglian Water River Nene SSO UPPER HEYFORD 9 9 100
Anglian Water Grendon Brook SSO 6 8 100
Anglian Water Great River Ouse POTTERSPURY - CHURCH END CSO 2 7 60.8
Anglian Water Milton Brook SSO MILTON MALSOR 10 5 94
Anglian Water Wollaston Brook WOLLASTON - LONDON ROAD CSO 12 4 99.8
Anglian Water Pattishall Brook EX PATTISHALL STW SSO 6 3 100
Anglian Water River Tove WAPPENHAM SPS EO 2 3 99.2
Anglian Water Wotton Brook ROTHERSTHORPE PS 4 2 100
Anglian Water Bugbrooke Brook GRIMSCOTE PUMPING STATION 4 1 100
Anglian Water Un Castle Ashby CASTLE ASHBY STW 8 1 100
Anglian Water Grendon Brook GRENDON HALF MOON 1 0 98.4
Anglian Water Grendon Brook YARDLEY HASTINGS STW PS 1 0 100
Anglian Water River Tove BLAKESLEY TPS MANHOLE 135 0 0 99.7
Anglian Water Hinton Stream BRACKLEY - BRIDGE STREET CSO 0 0 98.5
Anglian Water River Tove BRADDEN PS NO.2 0 0 100
Anglian Water River Tove COSGROVE 23 MAIN STREET CSO 0 0 99.5
Anglian Water Great River Ouse DEANSHANGER CSO 0 0 100
Anglian Water Farthingstone Brook River Nene LITCHBOROUGH WRC 0 0 100
Anglian Water Unknown River Nene LITTLE HOUGHTON SSO 0 0 84.8
Anglian Water Unknown ROADE SO 0 0 14.2
Anglian Water Salcey Brook SALCEY FOREST SO 0 0 99.1
Anglian Water Silverstone Brook River Tove TOWCESTER TERMINAL PUMPING STATION 0 0 100
Anglian Water River Nene WOLLASTON (8250) SSO 0 0 61.8

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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