Horsham was polluted by sewage 984 times in 2023
lasting 11,004 hours - that's 1.27 years!

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Constituency

✔ means we have experimental daily data since 2023

Totals for Horsham in 2023

20 Sites polluted by Southern Water, Thames Water

984 sewage dumps
11,004 h duration

That's 1.27 years! On average 2.7 times a day

Change Over Time

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Constituencies near Horsham

Waterways in Horsham

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 Horsham 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 0 of the total 21 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Southern Water	Nuthurst Stream	MONKS GATE WWTW	127	1,961	98.2
Southern Water	River Arun	MANNINGS HEATH WWTW	121	1,898	100
Southern Water	River Ouse	BALCOMBE WASTEWATER TREATMENT WORKS	121	1,401	99.65
Southern Water	River Arun	SLINFOLD WWTW	90	1,083	98.9
Southern Water	Par Brook	BILLINGSHURST WWTW	73	935	99.7
Southern Water	River Arun	HORSHAM WWTW	58	776	99.7
Southern Water	Parsons Brook	BARNS GREEN WWTW	63	569	99.9
Southern Water	Boldings Brook, River Arun	WARNHAM WWTW	48	507	100
Southern Water	Lywood Stream	ARDINGLY WWTW	36	366	100
Southern Water	Freshwater River	PARTRIDGE PLACE PUMPING STATION	49	364	99.9
Southern Water	Freshwater River	FARHALLS CRESCENT HORSHAM CSO	32	288	100
Southern Water	River Medway	WITHYPITTS PUMPING STATION	44	239	99.8
Southern Water	River Arun	RUDGWICK RECREATION GROUND CSO	26	176	100
Thames Water	Gatwick Stream	Pease Pottage	15	139	84
Southern Water	Horn Brook	KERVES LANE HORSHAM WPS	30	132	99.2
Southern Water	Par Brook	LAND ADJ. BILLINGSHURST PUMP. STN	16	84	99.7
Southern Water	River Medway	HAZEL WAY PUMPING STATION	16	49	99.9
Southern Water	Balcombe Lake	ST JAMES COTTAGE BALCOMBE CSO	14	20	99.9
Southern Water	Felbridge Wtr	FERNHILL CLOSE CRAWLEY DOWN	2	6	27.4
Southern Water	Lywood Stream River Ouse	ARDINGLY WWTW, ARDINGLY	3	3	100
Thames Water	Ifield Brook	COLGATE WASTEWATER TREATMENT WORKS	0	0	43.7

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.

Analysing sewage pollution by the Water Industry

With generous support from:

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