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Polluted by sewage 475 times in 2025 lasting 5,257 hours
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Donate NowHere are all the reported sewage overflow totals for Horsham 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 constituency 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 % |
|---|---|---|---|---|---|
| Southern Water | River Arun | MANNINGS HEATH WWTW | 76 | 1,251 | 100 |
| Southern Water | Nuthurst Stream | MONKS GATE WWTW | 77 | 1,103 | 100 |
| Southern Water | Cowfold Stream River Adur | COWFOLD WWTW | 45 | 499 | 100 |
| Southern Water | Par Brook | BILLINGSHURST WWTW | 44 | 420 | 100 |
| Southern Water | Parsons Brook | BARNS GREEN WWTW | 47 | 417 | 99.7 |
| Southern Water | River Arun | SLINFOLD WWTW | 40 | 392 | 100 |
| Southern Water | River Adur | PARTRIDGE GREEN S.T.W. | 43 | 361 | 99.4 |
| Southern Water | Boldings Brook, River Arun | WARNHAM WWTW | 29 | 275 | 100 |
| Southern Water | River Arun | HORSHAM WWTW | 27 | 268 | 99.7 |
| Southern Water | Par Brook | LAND ADJ. BILLINGSHURST PUMP. STN | 15 | 104 | 100 |
| Southern Water | River Arun | RUDGWICK RECREATION GROUND CSO | 13 | 88 | 93.1 |
| Southern Water | Horn Brook | KERVES LANE HORSHAM WPS | 7 | 49 | 99.1 |
| Southern Water | Freshwater River | FARHALLS CRESCENT HORSHAM CSO | 12 | 24 | 100 |
| Thames Water | Ifield Brook | COLGATE WASTEWATER TREATMENT WORKS | 0 | 0 | 100 |
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
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.
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Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org