Guildford polluted by sewage 171 times in 2023 - lasting 1,083 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 Guildford in 2023
10 Sites polluted by Thames Water
171 sewage dumps
1,083 h duration
That's 1.5 months. 3.3 times a week, on average
Change Over Time
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 Guildford 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 13 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 %
Thames Water Cranleigh Waters LITTLEMEAD INDUSTRIAL ESTATE CSO 56 421 100
Thames Water Cranleigh Waters CRANLEIGH STW, CRANLEIGH, SURREY 27 164 93.7
Thames Water Wey GUILDFORD STW 15 139 98.4
Thames Water Thornhurst Brook Canfold Wood 23 124 97
Thames Water Cranleigh Waters/Littlemead CSO AT KNOWLE LANE 22 95 100
Thames Water River Wey GODALMING WASTEWATER TREATMENT WORK 14 83 99.6
Thames Water Cobbler'S Brook Ockley Road 9 45 92
Thames Water Cranleigh Waters Taylors Crescent, Cranleigh 3 8 98
Thames Water River Wey CSO AT MARKENFIELD ROAD 1 0 99.6
Thames Water Blackwater SWS, SOUTH LANE, ASH, SURREY 1 0 95.6
Thames Water Littlemead Brook EWHURST ROAD, CRANLEIGH, SURREY 0 0 92.6
Thames Water Cranleigh Waters SHAMLEY GREEN (WONERSH) WWTW 0 0 100
Thames Water Rowly Brook Rowly Drive 0 0 0

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.