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Plymouth Sutton and Devonport - 2025 Sewage

Polluted by sewage 8,190 hours in 2025 , monitoring offline 3,778 hours , potential overflows 1,273 hours

© OpenStreetMap contributors
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 Plymouth Sutton and Devonport 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.

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Constituencies near Plymouth Sutton and Devonport

Daily Data

Jan - 1,718 hours , 286 potential
Feb - 583 hours , 672 offline
Mar - 4 hours , 130 offline
Apr - 447 hours , 215 offline
May - 13 hours , 407 offline
Jun - 341 hours , 746 offline
Jul - 12 hours
Aug - 411 hours , 173 offline
Sept - 434 hours
Oct - 105 hours , 0 potential
Nov - 1,492 hours , 219 potential
Dec - 2,626 hours , 744 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
South West Water EASTERN KINGS SPS_PSCSOEO_PLYMOUTH Plymouth Sound 50 665h 53m 2 h
South West Water CAMELS HEAD STW_SSO_PLYMOUTH Weston Mill Lake 29 587h 24m -
South West Water CAMELS HEAD STW_SO_PLYMOUTH Weston Mill Lake 29 556h 30m -
South West Water CAMELS HEAD STW_SSO_PLYMOUTH Weston Mill Lake 33 552h 34m -
South West Water CAMELS HEAD STW_SO_PLYMOUTH Weston Mill Lake 34 512h 28m -
South West Water CENTRAL STW SHAFT 16 SPST_PSCSOEO_PLYMOU Plymouth Sound/Plym Estuary 38 449h 38m -
South West Water CAMBRIDGE LANE_CSO_PLYMOUTH Plymouth Sound Via Sws 50 422h 38m 56 h
South West Water EFFORD MARSH_CSO_PLYMOUTH Leigham Mill Stream 39 408h 42m -
South West Water CENTRAL STW SHAFT 16 SPST_PSCSOEO_PLYMOU Plymouth Sound/Plym Estuary 63 361h 46m 453 h
South West Water EFFORD MARSH_CSO_PLYMOUTH Leigham Mill Stream 21 310h 25m -
South West Water DOCKYARD No2 SPS_PSCSOEO_PLYMOUTH River Tamar 26 186h 20m -
South West Water DOCKYARD No3 SPS_PSCSOEO_PLYMOUTH River Tamar 26 185h 36m -
South West Water 59 BRETONSIDE_CSO_PLYMOUTH Sutton Harbour Via Sws 38 181h 25m -
South West Water DOCKYARD No3 SPS_PSCSOEO_PLYMOUTH River Tamar 20 152h 20m -
South West Water FIELD O/S XX LAIRA PARK GDN_CSO_PLYMOUTH River Plym Via Sws 29 146h 20m -
South West Water POTTERY QUAY SPS_PSCSOEO_PLYMOUTH Plymouth Sound 21 139h 7m -
South West Water ARNOLDS POINT SPS_PSCSOEO_PLYMOUTH River Plym Via Sws 13 127h 27m -
South West Water EASTERN KINGS SPS_PSCSOEO_PLYMOUTH Plymouth Sound 19 122h 43m -
South West Water FIELD O/S XX LAIRA PARK GDN_CSO_PLYMOUTH River Plym Via Sws 49 116h 37m -
South West Water CENTRAL PARK_CSO_PLYMOUTH Stonehouse Creek Via Sws 8 109h 18m -
South West Water RD OUTSIDE XXX PIKE RD_CSO_PLYMOUTH River Plym Via Sws 31 92h 34m 0 h
South West Water SEYMOUR PLACE_CSO_PLYMOUTH Stonehouse Creek 14 88h 23m 509 h
South West Water PEVERELL PARK ROAD_CSO_PLYMOUTH Stonehouse Creek Via Sws 12 84h 48m -
South West Water PEVERELL PARK ROAD_CSO_PLYMOUTH Stonehouse Creek Via Sws 13 79h 53m -
South West Water LIPSON VALE 1_CSO_PLYMOUTH River Plym Via Sws 52 76h 8m -
South West Water LIPSON VALE 1_CSO_PLYMOUTH River Plym Via Sws 25 72h 47m -
South West Water RD OUTSIDE XXX PIKE RD_CSO_PLYMOUTH River Plym Via Sws 67 70h 20m -
South West Water CENTRAL PARK_CSO_PLYMOUTH Stonehouse Creek Via Sws 10 68h 33m -
South West Water XX JEPHSON RD_CSO_PLYMOUTH River Plym Via Sws 10 66h 37m -
South West Water CATTEDOWN ROAD SPS_PSCSOEO_PLYMOUTH Plymouth Sound 24 65h 32m -
South West Water CATTEDOWN ROAD SPS_PSCSOEO_PLYMOUTH Plymouth Sound 12 61h 47m -
South West Water CAMBRIDGE LANE_CSO_PLYMOUTH Plymouth Sound Via Sws 21 54h 51m -
South West Water MUTTON COVE SPS_PSCSOEO_PLYMOUTH River Tamar 26 50h 23m -
South West Water MILBAY STORAGE TANK_CSOEO_PLYMOUTH Plymouth Sound 6 50h 8m -
South West Water POTTERY QUAY SPS_PSCSOEO_PLYMOUTH Plymouth Sound 18 49h 55m -
South West Water OCEAN COURT SPS_PSCSOEO_PLYMOUTH Plymouth Sound 14 47h 46m -
South West Water ARNOLDS POINT SPS_PSCSOEO_PLYMOUTH River Plym Via Sws 5 44h 35m -
South West Water BARN PARK ROAD_CSO_PLYMOUTH Pennycomequick Stream Via Sws 28 41h 3m -
South West Water SEYMOUR PLACE_CSO_PLYMOUTH Stonehouse Creek 10 40h 14m -
South West Water BARN PARK ROAD_CSO_PLYMOUTH Pennycomequick Stream Via Sws 20 39h 2m -
South West Water LIPSON VALE 2_CSO_PLYMOUTH River Plym Via Sws 16 37h 47m -
South West Water PARADISE RD GRAVEYARD_CSO_PLYMOUTH Stonehouse Creek Via Sws 18 36h 11m -
South West Water COMMERCIAL RD_CSO_PLYMOUTH Plymouth Sound 17 34h 9m -
South West Water MUTTON COVE SPS_PSCSOEO_PLYMOUTH River Tamar 15 32h 21m -
South West Water OCEAN COURT SPS_PSCSOEO_PLYMOUTH Plymouth Sound 23 32h 3m -
South West Water LIPSON VALE 2_CSO_PLYMOUTH River Plym Via Sws 26 31h 6m 18 h
South West Water 59 BRETONSIDE_CSO_PLYMOUTH Sutton Harbour Via Sws 9 29h 54m 987 h
South West Water COMMERCIAL RD_CSO_PLYMOUTH Plymouth Sound 9 23h 24m -
South West Water WILTON RD/ VALLETORT RD_CSO_PLYMOUTH Stonehouse Creek Via Sws 27 22h 49m -
South West Water PENNYCOMEQUICK HILL_CSO_PLYMOUTH Stone House Creek Via Sws 2 22h 2m 46 h
South West Water XXX OUTLAND ROAD_CSO_PLYMOUTH Stonehouse Creek 8 17h 51m 119 h
South West Water BARBICAN TANKS_CSOEO_PLYMOUTH Plymouth Sound 4 16h 2m -
South West Water EDINBURGH STREET SPS_PSCSOEO_PLYMOUTH River Tamar 9 15h 32m -
South West Water MILBAY STORAGE TANK_CSOEO_PLYMOUTH Plymouth Sound 6 14h 53m -
South West Water 178 BEAUMONT ROAD_CSO_PLYMOUTH River Plym Via Sws 24 14h 37m 160 h
South West Water PARADISE RD GRAVEYARD_CSO_PLYMOUTH Stonehouse Creek Via Sws 15 14h 15m 120 h
South West Water LAIRA AV_CSO_PLYMOUTH River Plym Via Sws 6 13h 31m 577 h
South West Water NORTH PROSPECT_CSO_PLYMOUTH Weston Mill Lake 4 12h 44m -
South West Water 178 BEAUMONT ROAD_CSO_PLYMOUTH River Plym Via Sws 12 12h 9m -
South West Water TREFUSIS PARK_CSO_PLYMOUTH River Plym 12 11h 38m -
South West Water X FARINGDON ROAD_CSO_PLYMOUTH River Plym Via Sws 6 11h 16m -
South West Water XX JEPHSON RD_CSO_PLYMOUTH River Plym Via Sws 13 10h 41m -
South West Water SALTASH ROAD SPS_PSCSOEO_PLYMOUTH River Tamar 13 10h 41m -
South West Water WILTON RD/ VALLETORT RD_CSO_PLYMOUTH Stonehouse Creek Via Sws 5 10h 21m -
South West Water S/O ENTRY 1 EDNA TERRACE_CSO_PLYMOUTH River Plym Via Sws 5 9h 57m -
South West Water X FARINGDON ROAD_CSO_PLYMOUTH River Plym Via Sws 9 9h 56m -
South West Water TREFUSIS PARK_CSO_PLYMOUTH River Plym 16 9h 48m 1,614 h
South West Water HARLECH CLOSE_CSO_PLYMOUTH Leigham Mill Stream 10 9h 45m -
South West Water SALTASH ROAD SPS_PSCSOEO_PLYMOUTH River Tamar 8 9h 45m -
South West Water S/O ENTRY 1 EDNA TERRACE_CSO_PLYMOUTH River Plym Via Sws 7 7h 15m -
South West Water EDINBURGH STREET SPS_PSCSOEO_PLYMOUTH River Tamar 10 6h 55m -
South West Water BARBICAN TANKS_CSOEO_PLYMOUTH Plymouth Sound 4 6h 34m -
South West Water 78 BEAUMONT ROAD_CSO_PLYMOUTH River Plym Via Sws 17 6h 34m -
South West Water MILLBRIDGE_CSO_PLYMOUTH Stonehouse Creek Via Sws 4 6h 19m -
South West Water CORNWALL BEACH SPS_PSCSOEO_PLYMOUTH River Tamar 1 6h 15m -
South West Water NORTH PROSPECT_CSO_PLYMOUTH Weston Mill Lake 6 5h 28m -
South West Water DALE ROAD/EAST PARK AVENUE_CSO_PLYMOUTH Stonehouse Creek Via Sws 7 5h 23m -
South West Water SEYMOUR AVENUE/BEAUMONT RD_CSO_PLYMOUTH River Plym Via Sws 11 5h 15m 13 h
South West Water EMBANKMENT ROAD_PSCSOEO_PLYMOUTH River Plym 2 4h 41m -
South West Water HARLECH CLOSE_CSO_PLYMOUTH Leigham Mill Stream 8 4h 20m -
South West Water MILLBRIDGE_CSO_PLYMOUTH Stonehouse Creek Via Sws 4 4h -
South West Water JETTY_PSCSOEO_PLYMOUTH River Plym Estuary 3 3h 59m -
South West Water VICTORIA PARK UPPER_CSO_PLYMOUTH Stonehouse Creek Via Sws 3 3h 48m -
South West Water CAVENDISH RD_CSO_PLYMOUTH River Plym Via Sws 7 3h 25m -
South West Water PENNYCOMEQUICK ROUNDABOUT_CSO_PLYMOUTH Plymouth Sound Via Sws 3 3h 23m -
South West Water R/O GARAGES LANHYDROCK RD_CSO_PLYMOUTH River Plym 9 3h 20m -
South West Water SEYMOUR AVENUE/SALISBURY RD_CSO_PLYMOUTH River Plym Via Sws 10 3h 17m -
South West Water WEST HOE TANKS_CSOEO_PLYMOUTH Plymouth Sound 3 2h 50m -
South West Water XXX OUTLAND ROAD_CSO_PLYMOUTH Stonehouse Creek 7 2h 44m -
South West Water 44 CARMARTHEN RD_CSO_PLYMOUTH River Plym 11 2h 31m -
South West Water SEYMOUR AVENUE/BEAUMONT RD_CSO_PLYMOUTH River Plym Via Sws 4 1h 57m -
South West Water 45 CRAVEN AVENUE_CSO_PLYMOUTH River Plym Via Sws 3 1h 46m -
South West Water 28 FINCH CLOSE_CSO_PLYMOUTH River Plym Via Sws 3 1h 43m -
South West Water WEST HOE TANKS_CSOEO_PLYMOUTH Plymouth Sound 2 1h 35m -
South West Water CORNWALL BEACH SPS_PSCSOEO_PLYMOUTH River Tamar 2 0h 58m -
South West Water COMMERCIAL RD/PLACE_CSO_PLYMOUTH Cattewater 3 0h 51m -
South West Water R/O GARAGES LANHYDROCK RD_CSO_PLYMOUTH River Plym 3 0h 44m -
South West Water PLYMOUTH ROAD/EMBANKMENT RD_CSO_PLYMOUTH River Plym 3 0h 44m -
South West Water ETON PLACE_CSO_PLYMOUTH Millbay Dock Via Sws-Estuarine 2 0h 40m -
South West Water 78 BEAUMONT ROAD_CSO_PLYMOUTH River Plym Via Sws 2 0h 35m -
South West Water DOCKYARD No1 SPS_PSCSOEO_PLYMOUTH River Tamar 1 0h 34m -
South West Water HEATHFIELD RD_CSO_PLYMOUTH River Plym 1 0h 33m -
South West Water MORICE YARD_CSO_PLYMOUTH Hamoaze 1 0h 30m -
South West Water CAVENDISH RD_CSO_PLYMOUTH River Plym Via Sws 1 0h 17m -
South West Water MOON COVE NORTH YARD_CSO_PLYMOUTH Hamoaze 1 0h 14m -
South West Water SEYMOUR AVENUE/SALISBURY RD_CSO_PLYMOUTH River Plym Via Sws 1 0h 8m -
South West Water DALE ROAD/EAST PARK AVENUE_CSO_PLYMOUTH Stonehouse Creek Via Sws 1 0h 3m 372 h
South West Water TRACEY CT/WESTERN APPR_CSO_PLYMOUTH Millbay Docks Via Sws 0 0h -
South West Water DOCKYARD No1 SPS_PSCSOEO_PLYMOUTH River Tamar 0 0h -
South West Water 44 CARMARTHEN RD_CSO_PLYMOUTH River Plym 0 0h -
South West Water LAIRA AV_CSO_PLYMOUTH River Plym Via Sws 0 0h -
South West Water VICTORIA PARK UPPER_CSO_PLYMOUTH Stonehouse Creek Via Sws 0 0h -
South West Water 28 FINCH CLOSE_CSO_PLYMOUTH River Plym Via Sws 0 0h -
South West Water PLYMOUTH ROAD/EMBANKMENT RD_CSO_PLYMOUTH River Plym 0 0h -
South West Water ALLOTMENT OPP BICKHAM PK RD_CSO_PLYMOUTH Stonehouse Creek 0 0h -
South West Water ETON PLACE_CSO_PLYMOUTH Millbay Dock Via Sws-Estuarine 0 0h -
South West Water PENNYCOMEQUICK HILL_CSO_PLYMOUTH Stone House Creek Via Sws 0 0h -
South West Water PENNYCOMEQUICK ROUNDABOUT_CSO_PLYMOUTH Plymouth Sound Via Sws 0 0h -
South West Water JETTY_PSCSOEO_PLYMOUTH River Plym Estuary 0 0h -
South West Water DOCKYARD No2 SPS_PSCSOEO_PLYMOUTH River Tamar 0 0h -
South West Water MOON COVE NORTH YARD_CSO_PLYMOUTH Hamoaze 0 0h -
South West Water 45 CRAVEN AVENUE_CSO_PLYMOUTH River Plym Via Sws 0 0h -
South West Water EMBANKMENT ROAD_PSCSOEO_PLYMOUTH River Plym 0 0h -
South West Water COMMERCIAL RD/PLACE_CSO_PLYMOUTH Cattewater 0 0h -
South West Water HEATHFIELD RD_CSO_PLYMOUTH River Plym 0 0h -
South West Water ALLOTMENT OPP BICKHAM PK RD_CSO_PLYMOUTH Stonehouse Creek 0 0h -
South West Water MORICE YARD_CSO_PLYMOUTH Hamoaze 0 0h -
South West Water GWYN ROAD_CSO_PLYMOUTH River Plym 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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