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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 North Herefordshire, 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) |
|---|---|---|---|---|---|
| Severn Trent Water | COLWALL STW (SSTO) | Cradley Brook | 74 | 995 h 31m | 41.46 |
| Dwr Cymru Welsh Water | Kingsland WwTW Overflow | Pinsley Brook | 54 | 844 h 45m | 35.17 |
| Severn Trent Water | LEINTWARDINE - WATLING STREET (B) (CSO) | River Teme | 36 | 588 h 36m | 24.5 |
| Dwr Cymru Welsh Water | Moreton on Lugg WwTW Storm Overflow | River Lugg | 20 | 401 h 45m | 16.71 |
| Dwr Cymru Welsh Water | Eardisley WwTW Storm Overflow | Willersley Brook | 28 | 400 h 45m | 16.67 |
| Severn Trent Water | COLWALL STW (SSTO) | Cradley Brook | 25 | 345 h 29m | 14.38 |
| Dwr Cymru Welsh Water | Waterloo Road Kington Overflow | River Arrow | 47 | 317 h 20m | 13.21 |
| Severn Trent Water | COLWALL - XXXX FARM PS (CSO) | Cradley Brook | 18 | 245 h 28m | 10.21 |
| Dwr Cymru Welsh Water | Leominster WwTW Storm Overflow | Afon Lliw | 41 | 211 h | 8.79 |
| Severn Trent Water | COLWALL - XXXX FARM PS (CSO) | Cradley Brook | 26 | 200 h 23m | 8.33 |
| Dwr Cymru Welsh Water | Tarrington WwTW Storm Overflow | River Frome | 16 | 179 h 12m | 7.46 |
| Dwr Cymru Welsh Water | New Court Storm Overflow | Withington Brook | 22 | 165 h | 6.88 |
| Severn Trent Water | WEST MALVERN - DEWALDEN RD (CSO) | Cradley Brook\N | 7 | 150 h 50m | 6.25 |
| Dwr Cymru Welsh Water | Shobdon WwTW Storm Overflow | Pinsley Brook | 49 | 148 h 45m | 6.17 |
| Dwr Cymru Welsh Water | Weobley WwTW Storm Overflow | Newbridge Brook | 37 | 127 h 53m | 5.29 |
| Dwr Cymru Welsh Water | Yarpole Overflow | Ridgemoor Brook | 14 | 107 h 45m | 4.46 |
| Severn Trent Water | LEINTWARDINE - WATLING STREET (B) (CSO) | River Teme | 12 | 101 h 43m | 4.21 |
| Dwr Cymru Welsh Water | Bromyard New Road Storm Overflow | River Frome | 38 | 77 h 23m | 3.21 |
| Severn Trent Water | LEDBURY STW (CSO) | River Leadon | 31 | 70 h 57m | 2.92 |
| Dwr Cymru Welsh Water | Meadow Street Field Storm Overflow | Newbridge Brook | 27 | 63 h 36m | 2.62 |
| Severn Trent Water | WHITBOURNE STW (SSTO) | River Teme | 6 | 60 h 46m | 2.5 |
| Dwr Cymru Welsh Water | Love Lane Storm Overflow | River Arrow | 15 | 58 h 38m | 2.42 |
| Severn Trent Water | LEINTWARDINE - HIGH STREET (A) (CSO) | River Teme | 16 | 49 h 55m | 2.04 |
| Dwr Cymru Welsh Water | Bromyard WwTW Storm Overflow | River Frome | 26 | 46 h 15m | 1.92 |
| Severn Trent Water | LEDBURY - LOWER RD TRADING EST (CSO) | River Leadon | 8 | 42 h 6m | 1.75 |
| Severn Trent Water | LEDBURY - LITTLE MARCLE RD (BIFR) | River Leadon | 20 | 40 h 55m | 1.67 |
| Dwr Cymru Welsh Water | Luston Storm overflow | Unnamed Watercourse | 3 | 38 h 30m | 1.58 |
| Severn Trent Water | LEINTWARDINE - HIGH STREET (A) (CSO) | River Teme | 9 | 35 h 11m | 1.46 |
| Dwr Cymru Welsh Water | Bridge Street Pembridge Storm Overflow | River Arrow | 19 | 35 h | 1.46 |
| Dwr Cymru Welsh Water | Sherford Street Storm Overflow | River Frome | 32 | 34 h 47m | 1.42 |
| Severn Trent Water | LEDBURY STW (CSO) | River Leadon | 7 | 34 h 7m | 1.42 |
| Dwr Cymru Welsh Water | Tanyard Storm Overflow | Afon Lliw | 21 | 33 h 24m | 1.38 |
| Dwr Cymru Welsh Water | Lyonshall WwTW Overflow | Curl Brook | 8 | 29 h 15m | 1.21 |
| Dwr Cymru Welsh Water | Kington WwTW Storm Overflow | The Back Brook | 12 | 27 h 30m | 1.12 |
| Dwr Cymru Welsh Water | Unknown | Unknown | 2 | 24 h 31m | 1 |
| Dwr Cymru Welsh Water | Bodenham Moor Overflow | Tributary of River Lugg | 5 | 20 h 15m | 0.83 |
| Severn Trent Water | UPPER SAPEY (STW) | Sapey Brook | 17 | 19 h 40m | 0.79 |
| Severn Trent Water | WHITBOURNE STW (SSTO) | River Teme | 9 | 17 h 51m | 0.71 |
| Dwr Cymru Welsh Water | Bridge Street Kington Storm Overflow | River Arrow | 3 | 17 h 29m | 0.71 |
| Dwr Cymru Welsh Water | Porthouse Farm Industrial Estate Overflow | River Frome | 11 | 13 h | 0.54 |
| Dwr Cymru Welsh Water | Seaton Avenue Storm Overflow | Lugg Rheay | 6 | 3 h 44m | 0.12 |
| Dwr Cymru Welsh Water | Fownhope WwTW Storm Overflow | River Wye | 4 | 3 h 15m | 0.12 |
| Severn Trent Water | LEDBURY - LITTLE MARCLE RD (BIFR) | River Leadon | 1 | 2 h 5m | 0.08 |
| Dwr Cymru Welsh Water | Castlefields Leominster Overflow | River Lugg | 1 | 0 h 59m | 0 |
| Severn Trent Water | LEDBURY - LOWER RD TRADING EST (CSO) | River Leadon | 0 | 0 h | 0 |
| Severn Trent Water | WEST MALVERN - DEWALDEN RD (CSO) | Cradley Brook\N | 0 | 0 h | 0 |
| Dwr Cymru Welsh Water | Off Millcroft Road Bodenham Overflow | Tributary of River Lugg | 0 | 0 h | 0 |
| Severn Trent Water | UPPER SAPEY (STW) | Sapey Brook | 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