Maldon - 2025 Sewage

Polluted by sewage 2,746 hours in 2025 , monitoring offline 3,579 hours , potential overflows 1,690 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Maldon for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

Totals for Maldon in 2025

Sewage2,746 hours
Monitoring offline3,579 hours
Potential pollution1,690 hours
Storm overflows52

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Constituencies near Maldon

Daily Data

Jan - 518 hours
Feb - 104 hours
Mar - 48 hours
Apr - 20 hours
May - 113 hours
Jun - 85 hours
Jul - 19 hours , 87 offline
Aug - 96 hours , 498 potential
Sept - 22 hours , 471 potential
Oct - 145 hours , 744 offline
Nov - 894 hours , 1,114 offline
Dec - 676 hours , 696 potential
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Anglian Water LT BADDOW-VILLAGE N HILL SP River Chelmer 41 577h 39m -
Anglian Water MAYLANDSEA STW Mayland Creek River Blackwater 40 562h 45m -
Anglian Water Southminster - Hall Road Combined Sewer Overflow Raywick Ditch 38 258h 48m -
Anglian Water RUNWELL-BROCK HILL OVERFLOW River Crouch 43 251h 8m 969 h
Anglian Water MAYLANDSEA STW Mayland Creek River Blackwater 13 205h 16m -
Anglian Water Burnham-on-Crouch Water Recycling Centre River Crouch 8 145h 16m 454 h
Anglian Water GALLEYWOOD RIGNALS LN OV Sandon Brook 10 143h 30m -
Anglian Water RUNWELL-BROCK HILL OVERFLOW River Crouch 9 87h 21m -
Anglian Water PURLEIGH STW Mundon Wash River 7 68h 58m -
Anglian Water LATCHINGDON STW Latchington Brook Mundon Crk B 6 52h 44m -
Anglian Water MALDON-FAMBRIDGE RD River Blackwater 12 52h 4m -
Anglian Water MAYLANDSEA-NIPSELLS CH TPS Mayland Brook 7 44h 29m -
Anglian Water SOUTHMINSTER-DEVONSHIRE RD SP Asheldham Brook 8 43h 22m -
Anglian Water CHELMSFORD STW Blackwater Est 5 41h 31m -
Anglian Water CHELMSFORD STW Blackwater Est 4 41h 30m -
Anglian Water Southminster - Hall Road Combined Sewer Overflow Raywick Ditch 8 37h 31m 720 h
Anglian Water RAMSDEN HEATH-HEATH RD SP Sandon Brook 3 30h 33m -
Anglian Water Burnham-on-Crouch Water Recycling Centre River Crouch 6 20h 30m 3,124 h
Anglian Water LT BADDOW-VILLAGE N HILL SP River Chelmer 3 15h -
Anglian Water COLD NORTON-STOW RD SP River Crouch 8 14h 28m -
Anglian Water RUNWELL-CHURCH END LA OVERFLOW River Crouch 4 13h 40m -
Anglian Water PURLEIGH STW Mundon Wash River 2 10h 17m -
Anglian Water E HANNINGFIELD-OLD CHRCH RD SP Sandon Brook 1 9h 36m -
Anglian Water MALDON-FAMBRIDGE RD River Blackwater 1 7h 14m -
Anglian Water STONE ST LAWRENCE-MAIN RD TPS Motts Farm Drain R Black 3 4h 59m -
Anglian Water SOUTHMINSTER-BURNHAM RD OV River Crouch 7 4h 52m -
Anglian Water SOUTHMINSTER-DEVONSHIRE RD SP Asheldham Brook 1 0h 52m -
Anglian Water CHELMSFORD STW Blackwater Est 1 0h 10m -
Anglian Water CHELMSFORD STW Blackwater Est 1 0h 10m -
Anglian Water MAYLANDSEA-NIPSELLS CH TPS Mayland Brook 0 0h -
Anglian Water Maldon Park Drive CSO River Blackwater Via A Lagoon 0 0h -
Anglian Water SOUTHMINSTER-BURNHAM RD OV River Crouch 0 0h -
Anglian Water GALLEYWOOD PONDS RD OV Sandon Brook 0 0h -
Anglian Water TILLINGHAM STW Holland Brook 0 0h -
Anglian Water COLD NORTON-STOW RD SP River Crouch 0 0h -
Anglian Water Ramsey Island St.Lawrence Drive Pumping Station Motts Farm Drain 0 0h -
Anglian Water RUNWELL-CHURCH END LA OVERFLOW River Crouch 0 0h -
Anglian Water GALLEYWOOD RIGNALS LN OV Sandon Brook 0 0h -
Anglian Water GALLEYWOOD PONDS RD OV Sandon Brook 0 0h -
Anglian Water RAMSDEN HEATH-HEATH RD SP Sandon Brook 0 0h -
Anglian Water Maldon Park Drive CSO River Blackwater Via A Lagoon 0 0h -
Anglian Water Runwell - Downham Road Combined Sewer Overflow River Crouch 0 0h -
Anglian Water BRADWELL ON SEA STW Bradwell Creek 0 0h -
Anglian Water Ramsey Island St.Lawrence Drive Pumping Station Motts Farm Drain 0 0h -
Anglian Water Runwell - Downham Road Combined Sewer Overflow River Crouch 0 0h -
Anglian Water LATCHINGDON STW Latchington Brook Mundon Crk B 0 0h -
Anglian Water STONE ST LAWRENCE-MAIN RD TPS Motts Farm Drain R Black 0 0h -
Anglian Water TILLINGHAM STW Holland Brook 0 0h -
Anglian Water MAYLANDSEA-CARDNELLS SP Blackwater 0 0h 0 h
Anglian Water BICKNACRE-WOODHAM RD SP Fen Creek 0 0h -
Anglian Water E HANNINGFIELD-OLD CHRCH RD SP Sandon Brook 0 0h -
Anglian Water BICKNACRE-WOODHAM RD SP Fen Creek 0 0h -

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. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.

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Analysing sewage pollution by the Water Industry

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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