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Polluted by sewage 7,437 hours in 2025
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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 Maldon, 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) |
|---|---|---|---|---|---|
| Anglian Water | Southminster - Hall Road Combined Sewer Overflow | Raywick Ditch | 156 | 3,109 h 17m | 129.54 |
| Anglian Water | RUNWELL-BROCK HILL OVERFLOW | River Crouch | 83 | 1,220 h 47m | 50.83 |
| Anglian Water | MAYLANDSEA STW | Mayland Creek River Blackwater | 47 | 737 h 29m | 30.71 |
| Anglian Water | Southminster - Hall Road Combined Sewer Overflow | Raywick Ditch | 37 | 734 h | 30.58 |
| Anglian Water | LT BADDOW-VILLAGE N HILL SP | River Chelmer | 41 | 577 h 39m | 24.04 |
| Anglian Water | MAYLANDSEA STW | Mayland Creek River Blackwater | 13 | 205 h 16m | 8.54 |
| Anglian Water | Burnham-on-Crouch Water Recycling Centre | River Crouch | 8 | 145 h 16m | 6.04 |
| Anglian Water | GALLEYWOOD RIGNALS LN OV | Sandon Brook | 10 | 143 h 30m | 5.96 |
| Anglian Water | RUNWELL-BROCK HILL OVERFLOW | River Crouch | 9 | 87 h 21m | 3.62 |
| Anglian Water | PURLEIGH STW | Mundon Wash River | 7 | 68 h 58m | 2.83 |
| Anglian Water | LATCHINGDON STW | Latchington Brook Mundon Crk B | 6 | 52 h 44m | 2.17 |
| Anglian Water | MALDON-FAMBRIDGE RD | River Blackwater | 12 | 52 h 4m | 2.17 |
| Anglian Water | MAYLANDSEA-NIPSELLS CH TPS | Mayland Brook | 7 | 44 h 29m | 1.83 |
| Anglian Water | SOUTHMINSTER-DEVONSHIRE RD SP | Asheldham Brook | 8 | 43 h 22m | 1.79 |
| Anglian Water | CHELMSFORD STW | Blackwater Est | 5 | 41 h 31m | 1.71 |
| Anglian Water | CHELMSFORD STW | Blackwater Est | 4 | 41 h 30m | 1.71 |
| Anglian Water | RAMSDEN HEATH-HEATH RD SP | Sandon Brook | 3 | 30 h 33m | 1.25 |
| Anglian Water | Burnham-on-Crouch Water Recycling Centre | River Crouch | 6 | 20 h 30m | 0.83 |
| Anglian Water | LT BADDOW-VILLAGE N HILL SP | River Chelmer | 3 | 15 h | 0.62 |
| Anglian Water | COLD NORTON-STOW RD SP | River Crouch | 8 | 14 h 28m | 0.58 |
| Anglian Water | RUNWELL-CHURCH END LA OVERFLOW | River Crouch | 4 | 13 h 40m | 0.54 |
| Anglian Water | PURLEIGH STW | Mundon Wash River | 2 | 10 h 17m | 0.42 |
| Anglian Water | E HANNINGFIELD-OLD CHRCH RD SP | Sandon Brook | 1 | 9 h 36m | 0.38 |
| Anglian Water | MALDON-FAMBRIDGE RD | River Blackwater | 1 | 7 h 14m | 0.29 |
| Anglian Water | STONE ST LAWRENCE-MAIN RD TPS | Motts Farm Drain R Black | 3 | 4 h 59m | 0.17 |
| Anglian Water | SOUTHMINSTER-BURNHAM RD OV | River Crouch | 7 | 4 h 52m | 0.17 |
| Anglian Water | SOUTHMINSTER-DEVONSHIRE RD SP | Asheldham Brook | 1 | 0 h 52m | 0 |
| Anglian Water | CHELMSFORD STW | Blackwater Est | 1 | 0 h 10m | 0 |
| Anglian Water | CHELMSFORD STW | Blackwater Est | 1 | 0 h 10m | 0 |
| Anglian Water | COLD NORTON-STOW RD SP | River Crouch | 0 | 0 h | 0 |
| Anglian Water | TILLINGHAM STW | Holland Brook | 0 | 0 h | 0 |
| Anglian Water | Maldon Park Drive CSO | River Blackwater Via A Lagoon | 0 | 0 h | 0 |
| Anglian Water | E HANNINGFIELD-OLD CHRCH RD SP | Sandon Brook | 0 | 0 h | 0 |
| Anglian Water | Ramsey Island St.Lawrence Drive Pumping Station | Motts Farm Drain | 0 | 0 h | 0 |
| Anglian Water | STONE ST LAWRENCE-MAIN RD TPS | Motts Farm Drain R Black | 0 | 0 h | 0 |
| Anglian Water | Runwell - Downham Road Combined Sewer Overflow | River Crouch | 0 | 0 h | 0 |
| Anglian Water | LATCHINGDON STW | Latchington Brook Mundon Crk B | 0 | 0 h | 0 |
| Anglian Water | RAMSDEN HEATH-HEATH RD SP | Sandon Brook | 0 | 0 h | 0 |
| Anglian Water | Maldon Park Drive CSO | River Blackwater Via A Lagoon | 0 | 0 h | 0 |
| Anglian Water | MAYLANDSEA-CARDNELLS SP | Blackwater | 0 | 0 h | 0 |
| Anglian Water | GALLEYWOOD RIGNALS LN OV | Sandon Brook | 0 | 0 h | 0 |
| Anglian Water | RUNWELL-CHURCH END LA OVERFLOW | River Crouch | 0 | 0 h | 0 |
| Anglian Water | SOUTHMINSTER-BURNHAM RD OV | River Crouch | 0 | 0 h | 0 |
| Anglian Water | BRADWELL ON SEA STW | Bradwell Creek | 0 | 0 h | 0 |
| Anglian Water | GALLEYWOOD PONDS RD OV | Sandon Brook | 0 | 0 h | 0 |
| Anglian Water | MAYLANDSEA-NIPSELLS CH TPS | Mayland Brook | 0 | 0 h | 0 |
| Anglian Water | GALLEYWOOD PONDS RD OV | Sandon Brook | 0 | 0 h | 0 |
| Anglian Water | TILLINGHAM STW | Holland Brook | 0 | 0 h | 0 |
| Anglian Water | BICKNACRE-WOODHAM RD SP | Fen Creek | 0 | 0 h | 0 |
| Anglian Water | Runwell - Downham Road Combined Sewer Overflow | River Crouch | 0 | 0 h | 0 |
| Anglian Water | BICKNACRE-WOODHAM RD SP | Fen Creek | 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