Mole Valley polluted by sewage 229 times in 2022 - lasting 2,838 hours

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Contains OS Data © Crown copyright & database right 2021-2022
© Top of the Poops 2021-2023
✔ means we have experimental daily data for 2023
Totals for Mole Valley in 2022
12 Sites polluted by Thames Water
229 sewage dumps
2,838 h duration
That's 3.94 months. 4.4 times a week, on average
Live River Pollution Information (Updated 2 hours ago)
On the map above you can see live river pollution information. Rivers likely to be impacted by sewage pollution are marked in brown. This is based on Thames Water live data API, and modelling by Dr Alex Lipp at Merton College, Oxford. More details on the methodology will be added soon.
Daily Data for 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 2022

Here are all the reported sewage overflow totals for Mole Valley in 2022. Sometimes sewage can be being dumped for months at a time.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Thames Water Holmwood Stm Leigh Brk HOLMWOOD SEWAGE TREATMENT WORKS 72 1,053 99.7
Thames Water River Mole DORKING STW (STORM) 53 759 97.6
Thames Water River Mole LEATHERHEAD WWTW 46 712 100
Thames Water Mans Brook CHARLWOOD, SURREY 20 148 96.5
Thames Water River Wey/Ockham Mill Stream RIPLEY WASTEWATER TREATMENT WORKS 13 82 99.9
Thames Water River Mole Brockham Bridge 5 33 100
Thames Water River Mole COACH ROAD CSO ON STONEBRIDGE SEWER 4 20 43.4
Thames Water Tanners Brook SPOOKS HILL, NORTH HOLMWOOD, SURREY 6 11 98.5
Thames Water Into Land Box Hill 7 10 56.5
Thames Water Deanoak Brook Dean Oak Lane 1 2 100
Thames Water Bents Brook Bentsbrook Road, Dorking 1 0 100
Thames Water Deanoak Brook CSO AT CAPEL SPS 0 0 29.7
Thames Water Wey Wisley 0 0 0
Thames Water Mole Emlyn Lane 0 0 0
Thames Water Culverted Ockham Brook OCKHAM ROAD SOUTH CSO 0 0 100
Thames Water Mole CASTLE GARDENS SPS 0 0 18.2
Thames Water Mole Horley Road, Charlwood 0 0 0
Thames Water Tanners Brook SURFACE WATER SEWER 0 0 0
Thames Water Bookham Brook Commonside 0 0 96.8

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales

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.