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Area of Outstanding Natural Beauty

Tamar Valley - Live Sewage

Polluted by sewage 16,350 hours in 2026 - That's 1.89 years , monitoring offline 8,734 hours , potential overflows 2,867 hours so far..

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

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Totals for 2026

Sewage16,350 hours
Monitoring offline8,734 hours
Potential pollution2,867 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 - 7,507 hours , 155 offline
Feb - 7,361 hours , 14 potential
Mar - 1,167 hours , 491 potential
Apr - 4 hours , 720 potential
May - 24 hours , 744 potential
Jun - 0 hours , 720 potential
Jul - 0 hours , 177 potential
Aug - 193 hours , 1,346 offline
Sept - 90 hours , 1,249 offline
Oct - 0 hours , 138 offline

Storm overflows in and around Tamar Valley

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
South West Water GUNNISLAKE STW_SSO_GUNNISLAKE River Tamar 74 1,525h 35m -
South West Water STOKE HILL STW_SSO_CRAPSTONE Milton Stream 66 1,471h 57m -
South West Water METHERELL STW_SSO_METHERELL River Tamar 59 1,338h 39m -
South West Water STOKE HILL STW_SO_CRAPSTONE Milton Stream 58 1,158h 57m -
South West Water MILTON ABBOT STW_SSO_MILTON ABBOT River Tamar 59 1,155h 3m -
South West Water BEALS MILL SPS_PSCSOEO_BEALS MILL River Inny 49 1,053h 18m -
South West Water ST DOMINICK STW_SO_CALLINGTON River Tamar Estuary 49 1,011h 44m -
South West Water GUNNISLAKE NO. 2_CSO_GUNNISLAKE River Tamar Via Sws 66 867h 15m 2,852 h
South West Water BERE ALSTON STW_SO_BERE ALSTON Tidal River Tamar 56 862h 5m -
South West Water LANDRAKE STW_SO_LANDRAKE Landrake Stream 43 779h 38m -
South West Water ANTONY S T SEPTNK_SO_ANTONY River Lynher Estuary 54 770h 8m 14 h
South West Water ST DOMINICK_PSCSOEO_SALTASH River Tamar 43 679h 14m -
South West Water HAREWOOD RD_CSO_CALSTOCK River Tamar 56 531h 23m -
South West Water CROWNDALE_CSO_TAVISTOCK River Tavy 48 521h 49m 158 h
South West Water BEALS MILL STW_SO_REZARE River Inny 34 421h 8m 1 h
South West Water LATCHLEY STW_SO_GUNNISLAKE River Tamar 24 375h 24m -
South West Water PLAYING FIELDS_PSCSOEO_CALSTOCK River Tamar 52 324h 5m -
South West Water BERE ALSTON STW_SSO_BERE ALSTON Unknown 35 272h 8m -
South West Water BUCKLAND MONACHORUM STW_SSO_BUCKLAND MON River Tavy 24 254h 19m 185 h
South West Water BERE FERRERS SPST_PSCSOEO_BERE FERRERS River Tavy 42 183h 37m -
South West Water FORDER MAIN No1 SPS_PSCSOEO_SALTASH River Lyner 13 144h 45m 565 h
South West Water GUNNISLAKE STW_SO_GUNNISLAKE River Tamar 33 113h 8m 924 h
South West Water OLD MILL SPST_PSCSOEO_STOKE CLIMSLAND Alren Stream 12 100h 23m -
South West Water ELIOT DRIVE SPS_PSCSOEO_ST GERMANS Polbathic Lake 9 82h 6m 4,063 h
South West Water ST MELLION_PSCSOEO_ST MELLION St Mellion Stream 15 73h 17m -
South West Water CARGREEN SPS_PSCSOEO_CARGREEN River Tamar 30 66h 7m -
South West Water METHERELL STW_SO_METHERELL River Tamar 13 51h 44m -
South West Water ST GERMANS STW_SO_ST GERMANS Polbathic Lake 10 51h 20m -
South West Water KELLY_PSCSOEO_CALSTOCK River Tamar 15 38h 53m -
South West Water WILCOVE SPST_PSCSOEO_TORPOINT Hamoaze 5 26h 56m -
South West Water BERE ALSTON_CSO_BERE ALSTON River Tamar Via Sws 17 21h 22m -
South West Water POLBATHIC VILLAGE SPS_PSCSOEO_SALTASH Polbathic Stream 7 10h 14m -
South West Water CROWNDALE STW_SSO_TAVISTOCK River Tavy 3 6h 27m 2,194 h
South West Water FORDER No2 SPS_PSCSOEO_SALTASH River Lyner 3 3h 23m 565 h
South West Water CHILSWORTHY STW_SO_GUNNISLAKE River Tamar 9 2h 8m 75 h
South West Water THE QUAY_CSO_CALSTOCK River Tamar 2 0h 10m -
South West Water BEALS MILL STW_SO_REZARE River Inny 0 0h -
South West Water BERE FERRERS SPST_PSCSOEO_BERE FERRERS River Tavy 0 0h -
South West Water ST DOMINICK STW_SO_CALLINGTON River Tamar Estuary 0 0h -
South West Water FORDER No2 SPS_PSCSOEO_SALTASH River Lyner 0 0h -
South West Water LATCHLEY STW_SO_GUNNISLAKE River Tamar 0 0h -
South West Water GUNNISLAKE STW_SO_GUNNISLAKE River Tamar 0 0h -
South West Water METHERELL STW_SSO_METHERELL River Tamar 0 0h -
South West Water ST MELLION COTTS_CSO_SALTASH Stream 0 0h -
South West Water CHILSWORTHY STW_SO_GUNNISLAKE River Tamar 0 0h -
South West Water OLD MILL SPST_PSCSOEO_STOKE CLIMSLAND Alren Stream 0 0h -
South West Water CARGREEN SPS_PSCSOEO_CARGREEN River Tamar 0 0h -
South West Water GUNNISLAKE STW_SSO_GUNNISLAKE River Tamar 0 0h -
South West Water SHEVIOCK S T SEPTNK_SO_SHEVIOCK River Lynher 0 0h -
South West Water KELLY_PSCSOEO_CALSTOCK River Tamar 0 0h -
South West Water STOKE HILL STW_SSO_CRAPSTONE Milton Stream 0 0h -
South West Water HAREWOOD RD_CSO_CALSTOCK River Tamar 0 0h -
South West Water MILTON ABBOT_CSO_MILTON ABBOT River Tamar 0 0h -
South West Water PLAYING FIELDS_PSCSOEO_CALSTOCK River Tamar 0 0h -
South West Water CROWNDALE_CSO_TAVISTOCK River Tavy 0 0h -
South West Water BERE ALSTON STW_SO_BERE ALSTON Tidal River Tamar 0 0h -
South West Water ELIOT DRIVE SPS_PSCSOEO_ST GERMANS Polbathic Lake 0 0h -
South West Water LANDRAKE SPS_PSCSOEO_LANDRAKE River Lyner 0 0h -
South West Water ST MELLION_PSCSOEO_ST MELLION St Mellion Stream 0 0h -
South West Water CROWNDALE STW_SSO_TAVISTOCK River Tavy 0 0h -
South West Water MILTON ABBOT STW_SSO_MILTON ABBOT River Tamar 0 0h -
South West Water STOKE HILL STW_SO_CRAPSTONE Milton Stream 0 0h -
South West Water GUNNISLAKE NO. 2_CSO_GUNNISLAKE River Tamar Via Sws 0 0h -
South West Water MILTON ABBOT_CSO_MILTON ABBOT River Tamar 0 0h -
South West Water SHEVIOCK S T SEPTNK_SO_SHEVIOCK River Lynher 0 0h -
South West Water GUNNISLAKE NO. 1_CSO_GUNNISLAKE River Tamar 0 0h -
South West Water BERE ALSTON STW_SSO_BERE ALSTON Unknown 0 0h -
South West Water LANDRAKE SPS_PSCSOEO_LANDRAKE River Lyner 0 0h -
South West Water BERE ALSTON_CSO_BERE ALSTON River Tamar Via Sws 0 0h -
South West Water ST MELLION COTTS_CSO_SALTASH Stream 0 0h -
South West Water WILCOVE SPST_PSCSOEO_TORPOINT Hamoaze 0 0h -
South West Water KINGSWOOD ROAD SPS_PSCSOEO_GUNNISLAKE River Tamar 0 0h -
South West Water KINGSWOOD ROAD SPS_PSCSOEO_GUNNISLAKE River Tamar 0 0h -
South West Water ANTONY S T SEPTNK_SO_ANTONY River Lynher Estuary 0 0h -
South West Water FORDER MAIN No1 SPS_PSCSOEO_SALTASH River Lyner 0 0h -
South West Water ST DOMINICK_PSCSOEO_SALTASH River Tamar 0 0h -
South West Water BEALS MILL SPS_PSCSOEO_BEALS MILL River Inny 0 0h -
South West Water THE QUAY_CSO_CALSTOCK River Tamar 0 0h -
South West Water METHERELL STW_SO_METHERELL River Tamar 0 0h -
South West Water LANDRAKE STW_SO_LANDRAKE Landrake Stream 0 0h -
South West Water BUCKLAND MONACHORUM STW_SSO_BUCKLAND MON River Tavy 0 0h -
South West Water POLBATHIC VILLAGE SPS_PSCSOEO_SALTASH Polbathic Stream 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.