Don Valley was polluted by sewage 689 times in 2023
lasting 3,663 hours
- but monitoring was disabled in some locations, so could be more

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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 Don Valley in 2023
18 Sites polluted by Severn Trent Water, Yorkshire Water
689 sewage dumps
3,663 h duration
That's 5.09 months. On average 1.9 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Don Valley 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 21 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 %
Yorkshire Water River Don DENABY SEWAGE TREATMENT WORKS 66 808 100
Severn Trent Water Slutwell Stream TICKHILL SEWAGE TREATMENT WORKS 86 762 48.7
Yorkshire Water River Don BOOTHAM LANE PUMPING STATION 221 620 96.51
Severn Trent Water Ruddle Dyke BRAITHWELL SEWAGE TREATMENT WORKS 73 475 93.1
Severn Trent Water Warmsworth Beck WARMSWORTH WASTEWATER TREATMENT WKS 86 403 98.25
Yorkshire Water Hatfield Waste Drain HATFIELD WOODHOUSE STW 45 284 100
Yorkshire Water Kearsley Brook BURCROFT SEWAGE PUMPING STATION 29 104 100
Severn Trent Water River Torne BRANTON WASTEWATER TREATMENT WORKS 11 57 85.6
Severn Trent Water Clay Dike FINNINGLEY SEWAGE TREATMENT WORKS 8 30 93.2
Yorkshire Water Stonehill Drain REMPLE LANE CSO 22 29 98.5
Yorkshire Water River Don GREYS BRIDGE CSO 2 24 70.9
Severn Trent Water Rossington Drain ADJ TO BANKWOOD LANE PS - STORM OF 5 23 99.9
Yorkshire Water Kearsley Brook KEARSLEY LNE/DAYLANDS AVE/HAMELINE 12 16 64.3
Severn Trent Water River Idle WHARF STREET PUMPING STATION 6 8 100
Severn Trent Water Warmsworth Beck WARMSWORTH - COMMON LANE CSO 9 4 100
Yorkshire Water Leonards Drain WILKINSON AVENUE CSO 4 3 100
Severn Trent Water Salter Sike Drain WADWORTH DAW LANE SPS 2 3 85.3
Yorkshire Water Boating Dike ELLISON STREET CSO 2 0 84.4
Severn Trent Water River Torne RUDDLE DYKE - STORM OVERFLOW 0 0 0
Yorkshire Water River Don NORTH CLIFF ROAD CSO 0 0 95.7
Yorkshire Water River Don FERRYBOAT LANE SEWAGE PUMPING STN 0 0 65.6

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.