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We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Tonbridge, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Total Duration (days) |
|---|---|---|---|---|---|
| Southern Water | COWDEN SSO - 115723 | Kent Water | 42 | 609 h 26m | 25.38 |
| Southern Water | EDENBRIDGE SSO - 115738 | River Eden | 43 | 501 h 30m | 20.88 |
| Southern Water | COLDHARBOUR LANE HILDENBOROUGH CEO - 108613 | Hilden Brook | 24 | 319 h 37m | 13.29 |
| Southern Water | PENSHURST CSO - 115997 | River Medway | 40 | 302 h 5m | 12.58 |
| Southern Water | PRIORY MILL TONBRIDGE CEO - 108706 | Somerhill Stream | 18 | 278 h 12m | 11.58 |
| Southern Water | PRIORY MILL TONBRIDGE CEO - 108706 | Somerhill Stream | 27 | 244 h 15m | 10.17 |
| Southern Water | COWDEN SSO - 115723 | Kent Water | 15 | 237 h 52m | 9.88 |
| Southern Water | COLDHARBOUR LANE HILDENBOROUGH REAR XX CSO - 108612 | Hilden Brook | 16 | 198 h 36m | 8.25 |
| Southern Water | CANNON LANE TONBRIDGE CSO - 108596 | River Medway | 28 | 173 h 40m | 7.21 |
| Southern Water | TONBRIDGE SSO - 115731 | Botany Stream | 11 | 143 h 15m | 5.96 |
| Southern Water | PRIORY ROAD TONBRIDGE OUTSIDE 86 CSO - 108707 | Botany Stream | 23 | 131 h 54m | 5.46 |
| Southern Water | EDENBRIDGE SSO - 115738 | River Eden | 11 | 108 h 2m | 4.5 |
| Southern Water | EGGPIE LANE LEIGH CSO - 108633 | Unnamed Dicth/Stream | 13 | 100 h 3m | 4.17 |
| Southern Water | PENSHURST CSO - 115997 | River Medway | 15 | 87 h 48m | 3.62 |
| Southern Water | REEDS LANE SHIPBOURNE CEO - 108019 | River Bourne | 11 | 81 h 28m | 3.38 |
| Southern Water | COLDHARBOUR LANE HILDENBOROUGH CEO - 108613 | Hilden Brook | 9 | 78 h 12m | 3.25 |
| Southern Water | LEIGH ROAD HILDENBOROUGH CSO - 109117 | River Medway | 4 | 77 h 36m | 3.21 |
| Southern Water | FORDCOMBE CSO - 115982 | River Medway | 13 | 76 h 39m | 3.17 |
| Southern Water | HILDEN BRIDGE CEO - 108812 | Hilden Brook | 7 | 63 h 38m | 2.62 |
| Southern Water | OLD HADLOW ROAD TONBRIDGE CSO - 107444 | Mill Stream | 10 | 62 h 17m | 2.58 |
| Southern Water | HILDEN PARK ROAD HILDENBOROUGH CEO - 108655 | River Medway | 4 | 49 h 44m | 2.04 |
| Southern Water | TONBRIDGE SSO - 115731 | Botany Stream | 4 | 28 h 45m | 1.17 |
| Southern Water | CHIDDINGSTONE CAUSEWAY CEO - 108598 | River Eden | 2 | 23 h 14m | 0.96 |
| Southern Water | FORDCOMBE CSO - 115982 | River Medway | 6 | 23 h 10m | 0.96 |
| Southern Water | CHIDDINGSTONE CAUSEWAY CEO - 108598 | River Eden | 3 | 22 h 52m | 0.92 |
| Southern Water | HARTLAKE ROAD HADLOW CEO - 108897 | River Medway | 5 | 19 h 13m | 0.79 |
| Southern Water | TONBRIDGE CSO - 111336 | Botany Stream | 2 | 17 h 57m | 0.71 |
| Southern Water | HAWDEN ROAD TONBRIDGE CSO - 108736 | Hilden Brook | 1 | 15 h 15m | 0.62 |
| Southern Water | CANNON LANE TONBRIDGE CSO - 108596 | River Medway | 5 | 14 h 53m | 0.58 |
| Southern Water | REEDS LANE SHIPBOURNE CEO - 108019 | River Bourne | 2 | 12 h 23m | 0.5 |
| Southern Water | PRIORY ROAD TONBRIDGE OUTSIDE 86 CSO - 108707 | Botany Stream | 3 | 11 h 30m | 0.46 |
| Southern Water | RIDING LANE HILDENBOROUGH CSO - 108716 | Hilden Brook | 10 | 11 h 11m | 0.46 |
| Southern Water | CHAFFORD LANE FORDCOMBE CEO - 108599 | River Medway | 3 | 7 h 52m | 0.29 |
| Southern Water | CHARCOTT PLACE CEO - 108814 | Little Hawden Stream | 1 | 7 h | 0.29 |
| Southern Water | CHARCOTT PLACE CEO - 108814 | Little Hawden Stream | 4 | 6 h 36m | 0.25 |
| Southern Water | HILDEN BRIDGE CEO - 108812 | Hilden Brook | 1 | 5 h 2m | 0.21 |
| Southern Water | BOURNE BRIDGE HADLOW CSO - 108589 | River Bourne | 4 | 3 h 35m | 0.12 |
| Southern Water | RIDING LANE HILDENBOROUGH CSO - 108716 | Hilden Brook | 1 | 3 h 22m | 0.12 |
| Southern Water | EGGPIE LANE LEIGH CSO - 108633 | Unnamed Dicth/Stream | 2 | 2 h 34m | 0.08 |
| Southern Water | HAWDEN ROAD TONBRIDGE CSO - 108736 | Hilden Brook | 1 | 0 h 38m | 0 |
| Southern Water | BOURNE BRIDGE HADLOW CSO - 108589 | River Bourne | 0 | 0 h | 0 |
| Southern Water | OLD HADLOW ROAD TONBRIDGE CSO - 107444 | Mill Stream | 0 | 0 h | 0 |
| Southern Water | HILDEN PARK ROAD HILDENBOROUGH CEO - 108655 | River Medway | 0 | 0 h | 0 |
| Southern Water | TONBRIDGE CSO - 111336 | Botany Stream | 0 | 0 h | 0 |
| Southern Water | HARTLAKE ROAD HADLOW CEO - 108897 | River Medway | 0 | 0 h | 0 |
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.
This project is not associated, approved or endorsed by any of the companies whose logos you see here.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org