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Melksham and Devizes was polluted by sewage 2,169 times in 2023
lasting 25,826 hours - that's 2.99 years!

© 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 Melksham and Devizes in 2023
52 Sites polluted by Wessex Water
2,169 sewage dumps
25,826 h duration
That's 2.99 years! On average 5.9 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Melksham and 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 0 of the total 56 CSO locations had reporting enabled for less than half the year, of which 0 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
Wessex Water River Marden BROADS GREEN PS 109 2,158 100
Wessex Water River Avon MELKSHAM WWTW 115 1,723 99.65
Wessex Water By Brook BOX WASTEWATER TREATMENT WORKS 96 1,619 98.5
Wessex Water Seend Hill Stream SEEND WASTEWATER TREATMENT WORKS 73 1,324 99.1
Wessex Water Lam Brook Stream CHURCH LANE FARM PS 83 1,081 97
Wessex Water Clackers Brook SCOUT HUT CSO 83 973 99.9
Wessex Water Berryfield Stream BOWERHILL WASTEWATER TREATMENT WORK 84 889 99.95
Wessex Water Bristol Avon FRESHFORD WRC 57 753 100
Wessex Water River Marden ROUGH LEAZE 34 693 99.9
Wessex Water South Brook SHAW C OF E SCHOOL CSO 68 591 100
Wessex Water River Avon THE STAR PUMPING STATION 70 530 100
Wessex Water Summerham Brook TOWNSEND PS 39 521 100
Wessex Water River Frome WESTWOOD WATER RECYCLING CENTRE 33 483 100
Wessex Water Chalfield Brook SOUTH WRAXALL STW 32 436 99.9
Wessex Water Unknown THE GREEN PUMPING STATION 25 274 100
Wessex Water By Brook MILL LANE PUMPING STATION 56 273 100
Wessex Water Semmington Brook WICKLEASE PUMPING STATION 21 265 99.6
Wessex Water River Marden QUEMERFORD BRIDGE CSO 46 262 99.6
Wessex Water Semington Brook SEMINGTON BROOK PUMPING STATION 23 259 100
Wessex Water River Avon POUND LANE CSO 58 237 99.9
Wessex Water By Brook RECREATION GROUND 1 CSO 54 222 99.7
Wessex Water Semington Brook COULSTON PUMPING STATION 28 196 99.8
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 WINSLEY WASTEWATER TREATMENT WORKS 22 173 100
Wessex Water Unknown SEMINGTON ROAD PUMPING STATION 18 160 100
Wessex Water Semington Brook LAVINGTON (WOODBRIDGE) WWTW 24 139 100
Wessex Water River Avon SEMINGTON ROAD CSO 33 136 100
Wessex Water River Avon SILVER STREET CSO 19 120 98.9
Wessex Water Semington Brook URCHFONT WASTEWATER TREATMENT WORKS 16 117 99.7
Wessex Water River Avon BRADFORD ON AVON WWTW 20 115 99.85
Wessex Water Summerham Brook TOWERVIEW PUMPING STATION 41 113 99.5
Wessex Water Semington Brook GANGBRIDGE S P STN 16 101 100
Wessex Water Semington Brook GREAT HINTON PUMPING STATION 13 84 57.4
Wessex Water Unknown CURTIS ORCHARD PUMPING STATION 11 79 100
Wessex Water Summerham Brook ROWDE WASTEWATER TREATMENT WORKS 8 73 99.8
Wessex Water River Avon MARKET STREET CSO 56 70 99.9
Wessex Water Semington Brook KEEVIL PUMPING STATION 7 66 100
Wessex Water River Avon BARTON FARM CSO 8 64 100
Wessex Water River Avon WOOLLEY STREET CSO 28 63 99.5
Wessex Water By Brook COLERNE WATER RECYLCING CENTRE 11 45 100
Wessex Water Semington Brook POTTERNE WRC 21 42 99.9
Wessex Water By Brook RECREATION GROUND 2 CSO 55 39 99.7
Wessex Water Erlestoke Stream ERLESTOKE WATER RECYCLING CENTRE 8 18 99.8
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 Poulshot Stream VALLEY SEWER CSO 1 0 94.8
Wessex Water Summerham Brook BELL HILL SPS 0 0 100
Wessex Water Worton Stream POTTERNEWICK PUMPING STATION 0 0 100
Wessex Water Summerham Brook MILL LANE COMBINED SEWER OVERFLOW 0 0 97.1
Wessex Water Unknown SEMINGTON ROUNDABOUT 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. 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.