Devizes was polluted by sewage 1,175 times in 2023
lasting 15,383 hours - that's 1.78 years!
- but monitoring was disabled in some locations, so could be more

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Devizes in 2023
34 Sites polluted by Thames Water, Wessex Water
1,175 sewage dumps
15,383 h duration
That's 1.78 years! On average 3.2 times a day
Change Over Time
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Daily Data Since 2023
     Monitoring Online      Monitoring Offline      Polluting      Potentially Polluting      Unknown
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2023

Here are all the reported sewage overflow totals for Devizes in 2023. 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 40 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Wessex Water River Avon SPANIEL'S BRIDGE PUMPING STATION 193 4,210 99.9
Wessex Water Etchilhampton Water HORTON FARM PUMPING STATION 162 3,627 100
Thames Water Kennet MARLBOROUGH WWTW 172 2,383 90
Wessex Water Seend Hill Stream SEEND WASTEWATER TREATMENT WORKS 73 1,324 99.1
Wessex Water River Avon ALL CANNINGS PS 40 637 100
Wessex Water Summerham Brook TOWNSEND PS 39 521 100
Wessex Water River Avon NORTH NEWNTON PUMPING STATION 33 478 100
Wessex Water River Bourne COLLINGBOURNE DUCIS PUMPING STATION 101 316 100
Thames Water River Kennet FYFIELD WASTEWATER TREATMENT WORKS 15 238 84.1
Thames Water Kennet And Avon Canal GREAT BEDWYN WWTW 20 236 99.7
Wessex Water Semington Brook MILL ROAD PUMPING STATION 22 193 99.8
Wessex Water Waylen Brook DEVIZES WATER RECYCLING CENTRE 25 181 99.7
Wessex Water River Avon PEWSEY WASTEWATER TREATMENT WORKS 49 171 97.3
Wessex Water Semington Brook LAVINGTON (WOODBRIDGE) WWTW 24 139 100
Wessex Water Semington Brook URCHFONT WASTEWATER TREATMENT WORKS 16 117 99.7
Wessex Water Summerham Brook TOWERVIEW PUMPING STATION 41 113 99.5
Wessex Water Semington Brook GANGBRIDGE S P STN 16 101 100
Thames Water River Dun EAST GRAFTON STW, EAST GRAFTON, WIL 12 95 97.9
Wessex Water Summerham Brook ROWDE WASTEWATER TREATMENT WORKS 8 73 99.8
Wessex Water Unnamed Watercourse SMALL STREET PS 8 52 100
Wessex Water River Avon HIGH STREET PUMPING STATION 6 49 99.8
Wessex Water Semington Brook POTTERNE WRC 21 42 99.9
Wessex Water River Avon WILCOT PUMPING STATION 6 27 100
Wessex Water Erlestoke Stream ERLESTOKE WATER RECYCLING CENTRE 8 18 99.8
Thames Water Kennet CHILTON FOLIAT WWTW 11 6 99.8
Wessex Water River Avon PATNEY WEIR PUMPING STATION 3 5 100
Wessex Water Semington Brook Via Sws RUSSELL MILL LANE CSO 17 4 93.6
Wessex Water Summerham Brook ROUNDWAY HOSPITAL CSO 5 3 88
Wessex Water Easterton Brook MANOR HOUSE COMBINED SEWER OVERFLOW 4 2 99.6
Wessex Water Semington Brook Via Sws CHURCHILL ARMS COMBINED SEWER OF 14 2 96.9
Wessex Water Summerham Brook DUNKIRK HILL PUMPING STATION 4 1 83.2
Wessex Water River Avon SWAN PUMPING STATION 4 1 100
Thames Water Kennet London Road 2 1 100
Wessex Water Poulshot Stream VALLEY SEWER CSO 1 0 94.8
Wessex Water River Avon SALISBURY ROAD PUMPING STATION 0 0 100
Thames Water Shallbourne Stream Shalbourne 0 0 0
Wessex Water Worton Stream POTTERNEWICK PUMPING STATION 0 0 100
Wessex Water Summerham Brook BELL HILL SPS 0 0 100
Wessex Water Summerham Brook MILL LANE COMBINED SEWER OVERFLOW 0 0 97.1

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. This 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.