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Area of Outstanding Natural Beauty

Tamar Valley - 2025 Sewage

Polluted by sewage 29,999 hours in 2025 - That's 3.47 years , monitoring offline 1,806 hours , potential overflows 29 hours

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

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Totals for 2025

Sewage29,999 hours
Monitoring offline1,806 hours
Potential pollution29 hours
Storm overflows82

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Daily Data - when it rained, and when they spilled

Square = rainfall none → heavy
Drop = sewage minutes → all day
Potential pollution Monitoring offline
Jan - 5,169 hours , 28 potential
Feb - 2,926 hours , 82 offline
Mar - 577 hours
Apr - 829 hours
May - 77 hours , 383 offline
Jun - 429 hours , 0 potential
Jul - 20 hours
Aug - 158 hours
Sept - 630 hours , 792 offline
Oct - 827 hours
Nov - 9,372 hours , 40 offline
Dec - 8,977 hours

Storm overflows in and around Tamar Valley

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
South West Water METHERELL STW_SSO_METHERELL River Tamar 86 1,790h 11m 463 h
South West Water BEALS MILL STW_SO_REZARE River Inny 94 1,767h 52m -
South West Water STOKE HILL STW_SSO_CRAPSTONE Milton Stream 100 1,631h 49m -
South West Water STOKE HILL STW_SSO_CRAPSTONE Milton Stream 55 1,287h 42m -
South West Water BEALS MILL SPS_PSCSOEO_BEALS MILL River Inny 59 1,216h 27m -
South West Water ST DOMINICK STW_SO_CALLINGTON River Tamar Estuary 71 1,149h 37m -
South West Water METHERELL STW_SSO_METHERELL River Tamar 53 1,130h 37m -
South West Water GUNNISLAKE STW_SSO_GUNNISLAKE River Tamar 88 1,079h 8m -
South West Water STOKE HILL STW_SO_CRAPSTONE Milton Stream 66 1,052h 7m -
South West Water STOKE HILL STW_SO_CRAPSTONE Milton Stream 47 1,036h 6m -
South West Water ST DOMINICK STW_SO_CALLINGTON River Tamar Estuary 46 1,026h 6m -
South West Water HAREWOOD RD_CSO_CALSTOCK River Tamar 123 1,022h 30m 0 h
South West Water LANDRAKE STW_SO_LANDRAKE Landrake Stream 57 1,014h 50m -
South West Water BEALS MILL SPS_PSCSOEO_BEALS MILL River Inny 43 949h 21m -
South West Water ST DOMINICK_PSCSOEO_SALTASH River Tamar 57 895h 55m -
South West Water MILTON ABBOT STW_SSO_MILTON ABBOT River Tamar 41 850h -
South West Water LANDRAKE STW_SO_LANDRAKE Landrake Stream 35 740h 49m -
South West Water ST DOMINICK_PSCSOEO_SALTASH River Tamar 40 722h 19m -
South West Water BERE ALSTON STW_SO_BERE ALSTON Tidal River Tamar 37 719h 28m -
South West Water BUCKLAND MONACHORUM STW_SSO_BUCKLAND MON River Tavy 33 615h 36m -
South West Water MILTON ABBOT STW_SSO_MILTON ABBOT River Tamar 44 608h 28m -
South West Water CROWNDALE_CSO_TAVISTOCK River Tavy 36 560h 6m -
South West Water HAREWOOD RD_CSO_CALSTOCK River Tamar 35 510h 44m -
South West Water BERE ALSTON STW_SSO_BERE ALSTON Unknown 51 498h 25m -
South West Water BERE ALSTON STW_SSO_BERE ALSTON Unknown 28 480h 37m -
South West Water GUNNISLAKE STW_SSO_GUNNISLAKE River Tamar 31 426h 31m -
South West Water PLAYING FIELDS_PSCSOEO_CALSTOCK River Tamar 31 426h 22m -
South West Water LATCHLEY STW_SO_GUNNISLAKE River Tamar 25 374h 52m -
South West Water GUNNISLAKE NO. 2_CSO_GUNNISLAKE River Tamar Via Sws 34 370h 17m -
South West Water BEALS MILL STW_SO_REZARE River Inny 28 367h 41m -
South West Water BUCKLAND MONACHORUM STW_SSO_BUCKLAND MON River Tavy 20 325h 45m -
South West Water GUNNISLAKE STW_SO_GUNNISLAKE River Tamar 28 319h 19m -
South West Water BERE ALSTON STW_SO_BERE ALSTON Tidal River Tamar 49 310h 32m -
South West Water PLAYING FIELDS_PSCSOEO_CALSTOCK River Tamar 49 281h 7m -
South West Water CHILSWORTHY STW_SO_GUNNISLAKE River Tamar 30 257h 16m -
South West Water LATCHLEY STW_SO_GUNNISLAKE River Tamar 17 226h 28m 0 h
South West Water CROWNDALE_CSO_TAVISTOCK River Tavy 26 214h 54m 843 h
South West Water BERE FERRERS SPST_PSCSOEO_BERE FERRERS River Tavy 23 161h 39m -
South West Water ELIOT DRIVE SPS_PSCSOEO_ST GERMANS Polbathic Lake 48 157h 29m 95 h
South West Water FORDER MAIN No1 SPS_PSCSOEO_SALTASH River Lyner 14 154h 47m -
South West Water CROWNDALE STW_SSO_TAVISTOCK River Tavy 7 121h 11m 198 h
South West Water GUNNISLAKE STW_SO_GUNNISLAKE River Tamar 34 116h 20m -
South West Water GUNNISLAKE NO. 2_CSO_GUNNISLAKE River Tamar Via Sws 44 113h 25m -
South West Water ST MELLION_PSCSOEO_ST MELLION St Mellion Stream 13 102h 10m -
South West Water BERE FERRERS SPST_PSCSOEO_BERE FERRERS River Tavy 35 102h 1m -
South West Water CARGREEN SPS_PSCSOEO_CARGREEN River Tamar 16 83h 47m -
South West Water METHERELL STW_SO_METHERELL River Tamar 12 82h 54m -
South West Water ANTONY S T SEPTNK_SO_ANTONY River Lynher Estuary 16 81h 40m 40 h
South West Water OLD MILL SPST_PSCSOEO_STOKE CLIMSLAND Alren Stream 7 61h 10m 192 h
South West Water ANTONY S T SEPTNK_SO_ANTONY River Lynher Estuary 36 52h 26m -
South West Water CARGREEN SPS_PSCSOEO_CARGREEN River Tamar 20 45h 51m -
South West Water CHILSWORTHY STW_SO_GUNNISLAKE River Tamar 19 45h 27m -
South West Water ST MELLION_PSCSOEO_ST MELLION St Mellion Stream 9 43h 40m -
South West Water OLD MILL SPST_PSCSOEO_STOKE CLIMSLAND Alren Stream 12 41h 16m -
South West Water FORDER MAIN No1 SPS_PSCSOEO_SALTASH River Lyner 10 40h 33m -
South West Water BERE ALSTON_CSO_BERE ALSTON River Tamar Via Sws 12 29h 34m -
South West Water KELLY_PSCSOEO_CALSTOCK River Tamar 11 22h 24m -
South West Water BERE ALSTON_CSO_BERE ALSTON River Tamar Via Sws 18 15h 48m -
South West Water KELLY_PSCSOEO_CALSTOCK River Tamar 8 12h 23m -
South West Water ELIOT DRIVE SPS_PSCSOEO_ST GERMANS Polbathic Lake 4 10h -
South West Water METHERELL STW_SO_METHERELL River Tamar 5 8h 33m -
South West Water FORDER No2 SPS_PSCSOEO_SALTASH River Lyner 5 7h 59m -
South West Water ST MELLION COTTS_CSO_SALTASH Stream 2 6h 59m -
South West Water LANDRAKE SPS_PSCSOEO_LANDRAKE River Lyner 3 5h 46m -
South West Water THE QUAY_CSO_CALSTOCK River Tamar 9 5h 46m -
South West Water POLBATHIC VILLAGE SPS_PSCSOEO_SALTASH Polbathic Stream 4 3h 19m -
South West Water THE QUAY_CSO_CALSTOCK River Tamar 2 1h 1m -
South West Water WILCOVE SPST_PSCSOEO_TORPOINT Hamoaze 1 1h 1m -
South West Water POLBATHIC VILLAGE SPS_PSCSOEO_SALTASH Polbathic Stream 3 0h 52m -
South West Water LANDRAKE SPS_PSCSOEO_LANDRAKE River Lyner 1 0h 52m -
South West Water WILCOVE SPST_PSCSOEO_TORPOINT Hamoaze 2 0h 38m -
South West Water SHEVIOCK S T SEPTNK_SO_SHEVIOCK River Lynher 1 0h 34m -
South West Water MILTON ABBOT_CSO_MILTON ABBOT River Tamar 1 0h 7m -
South West Water KINGSWOOD ROAD SPS_PSCSOEO_GUNNISLAKE River Tamar 1 0h 4m -
South West Water FORDER No2 SPS_PSCSOEO_SALTASH River Lyner 0 0h -
South West Water ST MELLION COTTS_CSO_SALTASH Stream 0 0h -
South West Water ST GERMANS STW_SO_ST GERMANS Polbathic Lake 0 0h -
South West Water SHEVIOCK S T SEPTNK_SO_SHEVIOCK River Lynher 0 0h -
South West Water CROWNDALE STW_SSO_TAVISTOCK River Tavy 0 0h -
South West Water MILTON ABBOT_CSO_MILTON ABBOT River Tamar 0 0h -
South West Water GUNNISLAKE NO. 1_CSO_GUNNISLAKE River Tamar 0 0h -
South West Water KINGSWOOD ROAD SPS_PSCSOEO_GUNNISLAKE River Tamar 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.