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Area of Outstanding Natural Beauty

Surrey Hills - Live Sewage

Polluted by sewage 2,033 hours in 2026 , monitoring offline 345 hours so far..

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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Totals for 2026

Sewage2,033 hours
Monitoring offline345 hours
Potential pollution0 hours
Storm overflows21

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Daily Data - when it rained, and when they spilled

Square = rainfall none → heavy
Drop = sewage minutes → all day
Potential pollution Monitoring offline
Jan - 1,285 hours
Feb - 702 hours
Mar - 37 hours
Apr - 7 hours , 238 offline
May - 0 hours , 107 offline
Jun - 0 hours
Jul - 0 hours
Aug - 0 hours
Sept - 0 hours
Oct - 1 hours

Storm overflows in and around Surrey Hills

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Southern Water CHIDDINGFOLD SSO - 115804 Chiddingfold Stream 46 938h 1m -
Thames Water Dorking STW River Mole 27 427h -
Southern Water GRAYSWOOD CSO - 115984 Two S Of River Chidd 26 233h 14m -
Thames Water Stonebridge sso, brockham River Mole 28 202h 15m -
Southern Water TURNERS MEAD CHIDDINGFOLD CEO - 108370 Freshwater River 17 132h 46m -
Thames Water Boxhill SPS Into Land 14 42h 30m -
Thames Water Castle Gardens (Dorking) SPS Mole 5 34h 45m -
Thames Water Waverley Lane (Farnham) SPS Farnham Bourne 3 12h 30m -
Thames Water Spooks hill, north holmwood Tanners Brook 2 5h 30m -
Thames Water Churt SPS Whitmoor Vale Stream 1 3h 20m 345 h
Southern Water NORTHBRIDGE CHIDDINGFOLD CEO - 108295 Un River Arun 1 1h 50m -
Thames Water Dorking STW River Mole 0 0h -
Southern Water TURNERS MEAD CHIDDINGFOLD CEO - 108370 Freshwater River 0 0h -
Thames Water Castle Gardens (Dorking) SPS Mole 0 0h -
Southern Water GRAYSWOOD CSO - 115984 Two S Of River Chidd 0 0h -
Thames Water Spooks hill, north holmwood Tanners Brook 0 0h -
Southern Water CHIDDINGFOLD SSO - 115804 Chiddingfold Stream 0 0h -
Thames Water Waverley Lane (Farnham) SPS Farnham Bourne 0 0h -
Thames Water Boxhill SPS Into Land 0 0h -
Thames Water Stonebridge sso, brockham River Mole 0 0h -
Thames Water Churt SPS Whitmoor Vale Stream 0 0h -

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. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.