Hereford

Polluted by sewage 313 times in 2025 lasting 637 hours

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Totals for Hereford in 2025

12 Sites polluted by Dwr Cymru Welsh Water

313 sewage dumps

637 hours duration

Sewage pollution map of Hereford — Sewage pollution map of Hereford: 637 hours in 2025

That's 3.79 weeks. 6 times a week, on average

Change Over Time

Constituency for Hereford

Nearby Constituencies

Waterways in Hereford

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Hereford in 2025. 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 place all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Wye	EIGN WASTEWATER TREATMENT WORKS	47	405	99.9
Dwr Cymru Welsh Water	River Wye	ST MARTINS ALLOTMENTS CSO HEREFORD	31	96	99.9
Dwr Cymru Welsh Water	River Wye	BELMONT ROUNDABOUT CSO	9	50	94.1
Dwr Cymru Welsh Water	River Wye	GREYFRIARS BRIDGE CSO	15	32	92.8
Dwr Cymru Welsh Water	River Wye	EIGN 1B COMBINED SEWER OVERFLOW	8	24	99.9
Dwr Cymru Welsh Water	Yazor Brook	3 ELMS ROAD COMBINED SEWER OVERFLOW	24	11	98
Dwr Cymru Welsh Water	Yazor Brook	THREE ELMS ROAD CSO	14	6	99.9
Dwr Cymru Welsh Water	Yazor Brook	GRANDSTAND ROAD CSO	11	4	99.3
Dwr Cymru Welsh Water	Yazor Brook	BARTON ROAD COMBINED SEWER OVERFLOW	144	4	99.9
Dwr Cymru Welsh Water	Lugg Rheay	SEATON AVENUE CSO	6	2	93.7
Dwr Cymru Welsh Water	Widemarsh Brook	MISS CHAVES COMBINED SEWER OVERFLOW	2	0	99.9
Dwr Cymru Welsh Water	Belvedere Brook	WHITECROSS ROAD CSO HEREFORD	2	0	100
Dwr Cymru Welsh Water	River Wye	LEYMANS FIELD PS BRAEMAR GARDENS	0	0	99.9

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.

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Analysing sewage pollution by the Water Industry

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