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Area of Outstanding Natural Beauty

Wye Valley - 2025 Sewage

Polluted by sewage 3,563 hours in 2025

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

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Totals for 2025

Sewage3,563 hours
Monitoring offline0 hours
Potential pollution0 hours
Storm overflows25

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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 - 0 hours
Feb - 449 hours
Mar - 437 hours
Apr - 114 hours
May - 2 hours
Jun - 20 hours
Jul - 11 hours
Aug - 14 hours
Sept - 54 hours
Oct - 78 hours
Nov - 845 hours
Dec - 1,533 hours

Storm overflows in and around Wye Valley

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Dwr Cymru Welsh Water Welsh Street Storm Overflow River Wye 100 796h 32m -
Dwr Cymru Welsh Water St Briavels WwTW Storm Overflow Wye Estuary 95 722h 46m -
Dwr Cymru Welsh Water Newland WwTW Settled Storm Overflow River Wye 35 535h 49m -
Dwr Cymru Welsh Water Ruardean WwTW Storm Overflow Unnamed Tribuatary of Lodgegrove Brook 30 326h 6m -
Dwr Cymru Welsh Water Tintern Main Road Storm Overflow River Wye 15 285h 40m -
Dwr Cymru Welsh Water Wyesham Monmouth WwTW Storm Overflow River Wye 31 232h 41m -
Dwr Cymru Welsh Water Wye Street Storm Overflow River Wye 41 218h 14m -
Dwr Cymru Welsh Water Granville Street Riverbank Storm Overflow River Wye 27 95h 28m -
Dwr Cymru Welsh Water Lydbrook WwTW Storm Overflow River Wye 13 94h 45m -
Dwr Cymru Welsh Water Joyford The Sinks Storm Overflow Unnamed Brook 7 84h 15m -
Dwr Cymru Welsh Water Newland WwTW No.2 Storm Overflow Valley Brook 19 59h 40m -
Dwr Cymru Welsh Water Ross Lower Cleeve Storm Overflow River Wye 15 29h 11m -
Dwr Cymru Welsh Water Tintern WwTW Overflow River Wye 22 23h 52m -
Dwr Cymru Welsh Water Brampton Street Storm Overflow Rudhall Brook 12 19h 55m -
Dwr Cymru Welsh Water Homs Road Storm Overflow River Wye 11 19h 30m -
Dwr Cymru Welsh Water Newland WwTW No1 Storm Overflow Valley Brook 3 9h 15m -
Dwr Cymru Welsh Water Fownhope WwTW Storm Overflow River Wye 4 3h 42m -
Dwr Cymru Welsh Water Lydbrook Storm Overflow Tributary of the River Wye 2 2h 15m -
Dwr Cymru Welsh Water Cawdor Arch Road Storm Overflow Rudhall Brook 5 1h 29m -
Dwr Cymru Welsh Water Smallbrook Road Storm Overflow Small Brook 3 0h 57m -
Dwr Cymru Welsh Water Unknown Unknown 2 0h 45m -
Dwr Cymru Welsh Water Lydbrook Overflow River Wye 1 0h 30m -
Dwr Cymru Welsh Water Wilton Storm Overflow River Wye 1 0h 21m -
Dwr Cymru Welsh Water South Hillcrest Road Monmouth Overflow River Wye 0 0h -
Dwr Cymru Welsh Water North Hillcrest Road Monmouth Overflow River Wye 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.