Storm overflow register · 2025 annual return

South West Water storm overflows, 2025

South West Water reported 1,365 storm overflows in England for 2025. Together they recorded 46,164 spills over 407,006 hours, an average of 33.8 spills per overflow against 20.4 across England. That ranks 10 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 18% on 2024.

178 overflows did not spill · 275 spilled more than 60 times · 1,313 had monitors working for 90% of the year or more · 334 sewage treatment works with overflows

Hours spilling by month, 2025

Hours spilling, all South West Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All South West Water storm overflows

Sorted by hours spilling. Open an overflow for its permit, location, reasons for high spills and improvement status.

Overflow	Discharges to	Spills 2025	Hours 2025	Spills vs 2024	Monitor uptime
Lutton STW Inlet overflow at sewage works Sewage works Lutton Company site name LUTTON STW_SO_LUTTON EA ID / permit SBB00723 · 033125/SF/01 Outlet location SX59875917 (OS grid reference) · View on Apple Maps WFD catchment Piall (GB108047004020) 2024 spills / hours 110 / 746 Long-term average 74.4 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 940 hours spilling →	(S)River Piall	106	940	down 4%	100%
Torbryan PS Storm discharge at pumping station Company site name TORBRYAN SPST_PSCSOEO_TORBRYAN EA ID / permit SBB01255 · 203002 Outlet location SX82326669 (OS grid reference) · View on Apple Maps WFD catchment Am Brook (GB108046005210) 2024 spills / hours 54 / 1,126 Long-term average 41.5 spills a year (monitored since 2022) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 934 hours spilling →	Halwell Stream(S)	45	934	down 17%	100%
Fishermans SQUARE_CSO_MOUSEHOLE Overflow on sewer network EA ID / permit SBB01422 · Permit applied for Outlet location SW47002616 (OS grid reference) · View on Apple Maps WFD catchment Penzance (GB650806340000) 2024 spills / hours 77 / 743 Long-term average 75.5 spills a year (monitored since 2023) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 934 hours spilling →	Mounts Bay English Channel	74	934	down 4%	99%
Stoneyford Pumping Station Storm discharge at pumping station Company site name STONEYFORD SPS_PSCSOEO_CULLOMPTON EA ID / permit SBB01187 · 201612 Outlet location ST02870745 (OS grid reference) · View on Apple Maps WFD catchment Lower Culm (GB108045014970) 2024 spills / hours 99 / 1,783 Long-term average 85.0 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 931 hours spilling →	River Ken	59	931	down 40%	100%
North Fal STW (St Stephens Coombe) Storm tank at sewage works Sewage works North Fal Company site name NORTH FAL STW_SSO_ST STEVENS EA ID / permit SBB00839 · 302298 Outlet location SW94125092 (OS grid reference) · View on Apple Maps WFD catchment Gwindra Stream (GB108048001350) 2024 spills / hours 72 / 752 Long-term average 46.0 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 928 hours spilling →	Gwindra Stream (S)	59	928	down 18%	100%
Plymouth Central STW Storm discharge at pumping station (with treatment) Company site name CENTRAL STW SHAFT 16 SPST_PSCSOEO_PLYMOU EA ID / permit SBB00945 · 303347 Outlet location SX49915394 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Plymouth Hoe East Treatment UV (Ultraviolet) 2024 spills / hours 127 / 1,063 Long-term average 117.8 spills a year (monitored since 2012) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 925 hours spilling →	Plymouth Sound/Plym Estuary(E)	119	925	down 6%	100%
Bridgend Pumping Station Storm discharge at pumping station Company site name BRIDGEND SPS_PSCSOEO_NEWTON FERRERS EA ID / permit SBB00157 · 301628 Outlet location SX55474816 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Yealm 2024 spills / hours 90 / 838 Long-term average 39.3 spills a year (monitored since 2016) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 921 hours spilling →	Newton Creek (Estuarine)	53	921	down 41%	97%
Roborough STW Storm tank at sewage works Sewage works Roborough Company site name ROBOROUGH STW_SSO_ROBOROUGH EA ID / permit SBB01034 · NRA-SW-1504 Outlet location SS57501676 (OS grid reference) · View on Apple Maps WFD catchment Woolleigh Brook (GB108050014320) 2024 spills / hours 327 / 1,573 Long-term average 120.5 spills a year (monitored since 2022) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 920 hours spilling →	Trib. of Woolleigh Brook	143	920	down 56%	100%
The Ham PS Tank & CSO - Sidmouth Storm discharge at pumping station Company site name THE HAM SPST_PSCSOEO_SIDMOUTH 1 EA ID / permit SBB01228 · 200835 Outlet location SY13178690 (OS grid reference) · View on Apple Maps WFD catchment Lyme Bay West (GB650806420000) Bathing water Sidmouth Town 2024 spills / hours 101 / 1,642 Long-term average 71.5 spills a year (monitored since 2010) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 914 hours spilling →	(S) River Sid and (C) Lyme Bay	64	914	down 37%	100%
Polkerris Fine Screening Plant & PS Storm discharge at pumping station Company site name POLKERRIS SPST_PSCSOEO_POLKERRIS EA ID / permit SBB00952 · 302706 Outlet location SX09125191 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water St Austell Bay 2024 spills / hours 87 / 1,390 Long-term average 53.4 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 913 hours spilling →	St Austell Bay (C)	59	913	down 32%	100%
Lezant Pscso/EO Storm discharge at pumping station Company site name LEZANT SPS_PSCSOEO_LEZANT EA ID / permit SBB00688 · 301627 Outlet location SX33867920 (OS grid reference) · View on Apple Maps WFD catchment Lowley Brook (GB108047007920) 2024 spills / hours 99 / 1,736 Long-term average 66.8 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 902 hours spilling →	River Inny (S)	59	902	down 40%	98%
Chittlehamholt STW Inlet overflow at sewage works Sewage works Chittlehamholt Company site name CHITTLEHAMHOLT STW_SO_CHITTLEHAMHOLT EA ID / permit SBB00248 · NRA-SW-6748 Outlet location SS64742110 (OS grid reference) · View on Apple Maps WFD catchment Taw (River Mole to Estuary) (GB108050014530) 2024 spills / hours 90 / 857 Long-term average 130.8 spills a year (monitored since 2022) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 889 hours spilling →	(S) Trib of Clayton Stream	72	889	down 20%	100%
Goonhavern WwTW Inlet overflow at sewage works Sewage works Goonhavern Company site name GOONHAVERN STW_SO_GOONHAVERN EA ID / permit SBB00499 · NRA-SW-3701 Outlet location SW77735300 (OS grid reference) · View on Apple Maps WFD catchment Bolingey Stream (GB108049000700) 2024 spills / hours 75 / 731 Long-term average 70.2 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 887 hours spilling →	Trib of the Bolingey Stream	84	887	up 12%	97%
Petrockstowe STW Inlet overflow at sewage works Sewage works Petrockstowe Company site name PETROCKSTOWE STW_SO_PETROCKSTOW EA ID / permit SBB00932 · 202205 Outlet location SS51391016 (OS grid reference) · View on Apple Maps WFD catchment Little Mere River (GB108050014190) 2024 spills / hours 120 / 1,710 Long-term average 98.6 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 885 hours spilling →	Trib of Little Mere River(S)	76	885	down 37%	98%
Wembworthy STW Inlet overflow at sewage works Sewage works Wembworthy Company site name WEMBWORTHY NEW STW_SO_WEMBWORTHY EA ID / permit SBB01330 · 203835 Outlet location SS66051006 (OS grid reference) · View on Apple Maps WFD catchment Taw (River Yeo to Little Dart River) (GB108050014210) 2024 spills / hours 48 / 418 Long-term average 37.0 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 876 hours spilling →	The Labdon Stream(S)	93	876	up 94%	100%
Woolacombe Pscso/EO Storm discharge at pumping station Company site name WOOLACOMBE SPS_PSCSOEO_WOOLACOMBE EA ID / permit SBB01376 · 201678 Outlet location SS45084420 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Woolacombe Village 2024 spills / hours 52 / 796 Long-term average 64.6 spills a year (monitored since 2010) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation No investigation activity in reporting period Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 873 hours spilling →	Bristol Channel (C)	49	873	down 6%	100%
Bojewyan Pscso/EO Storm discharge at pumping station Company site name BOJEWYAN SPS_PSCSOEO_ST JUST EA ID / permit SBB00128 · 301603 Outlet location SW39053466 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 46 / 698 Long-term average 34.8 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 873 hours spilling →	Stream (S)	47	873	up 2%	100%
Willand Wastewater Treatment Works Storm tank at sewage works Sewage works Willand Company site name WILLAND STW_SSO_WILLAND EA ID / permit SBB01363 · 203113 Outlet location ST04201016 (OS grid reference) · View on Apple Maps WFD catchment Spratford Stream (GB108045015020) 2024 spills / hours 74 / 1,190 Long-term average 70.6 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 872 hours spilling →	Trib of River Culm	52	872	down 30%	100%
Marsh Mills WwTW Storm tank at sewage works Sewage works Marsh Mills Company site name MARSH MILLS STW_SSO_PLYMPTON EA ID / permit SBB00752 · NRA-SW-6977 Outlet location SX52015628 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Plymouth Hoe East 2024 spills / hours 98 / 1,054 Long-term average 85.5 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement UWWTR improvement completed, Operational improvement ongoing Volume & pollution Estimate from 871 hours spilling →	River Plym (Estuarine)	84	871	down 14%	99%
Commercial Road Pumping Station Storm discharge at pumping station Company site name COMMERCIAL ROAD SPS_PSCSOEO_PENRYN EA ID / permit SBB00297 · 303007 Outlet location SW78793443 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Fal Estuary 2024 spills / hours 96 / 1,275 Long-term average 80.5 spills a year High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 857 hours spilling →	The Penryn River (E)	75	857	down 22%	100%
Ashwater STW Inlet overflow at sewage works Sewage works Ashwater Company site name ASHWATER STW_SO_ASHWATER EA ID / permit SBB00055 · NRA-SW-6738 Outlet location SX39299530 (OS grid reference) · View on Apple Maps WFD catchment Carey (GB108047008040) 2024 spills / hours 97 / 537 Long-term average 60.8 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 855 hours spilling →	(S) River Carey	104	855	up 7%	100%
Hatherleigh STW Storm tank at sewage works Sewage works Hatherleigh Company site name HATHERLEIGH STW_SSO_HATHERLEIGH EA ID / permit SBB00546 · SWWA 153 Outlet location SS53800426 (OS grid reference) · View on Apple Maps WFD catchment Lower River Lew (Torridge) (GB108050008220) 2024 spills / hours 53 / 678 Long-term average 113.0 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 855 hours spilling →	River Lew (S)	58	855	up 9%	100%
Millbrook STW Storm tank at sewage works Sewage works Millbrook Company site name MILLBROOK STW_SSO_MILLBROOK EA ID / permit SBB00784 · NRA-SW-7829/FN/1 Outlet location SX43555229 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 27 / 360 Long-term average 30.0 spills a year (monitored since 2019) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 847 hours spilling →	Millbrook Lake	66	847	up 144%	100%
3 St Peters Close CSO Overflow on sewer network Company site name 3 ST PETERS CLOSE_CSO_PLYMOUTH EA ID / permit SBB00024 · 301768 Outlet location SX54755558 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Plymouth Hoe East 2024 spills / hours 115 / 1,333 Long-term average 98.5 spills a year (monitored since 2017) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 841 hours spilling →	Long Brook via SWS	107	841	down 7%	100%
Chawleigh STW Inlet overflow at sewage works Sewage works Chawleigh Company site name CHAWLEIGH STW_SSO_CHAWLEIGH EA ID / permit SBB00238 · NRA-SW-3839 Outlet location SS71991307 (OS grid reference) · View on Apple Maps WFD catchment Lower Little River Dart (GB108050014340) 2024 spills / hours 66 / 896 Long-term average 64.4 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 837 hours spilling →	Little Dart River	56	837	down 15%	100%
Aylesbeare STW Inlet overflow at sewage works Sewage works Aylesbeare Company site name AYLESBEARE STW_SO_AYLESBEARE EA ID / permit SBB00060 · NRA-SW-3581 Outlet location SY03589186 (OS grid reference) · View on Apple Maps WFD catchment Aylesbeare Stream (GB108045008730) 2024 spills / hours 103 / 779 Long-term average 89.8 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 831 hours spilling →	Aylesbeare Brook	55	831	down 47%	100%
Seaton STW Storm tank at sewage works Sewage works Seaton Company site name SEATON SOUTH STW_SSO_EAST DEVON EA ID / permit SBB01067 · 202563 Outlet location SY25299081 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Seaton (Devon) 2024 spills / hours 90 / 1,419 Long-term average 63.1 spills a year (monitored since 2011) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 825 hours spilling →	River Axe Estuary(E)	60	825	down 33%	100%
Halberton STW Halberton Storm tank at sewage works Sewage works Halberton Halberton Company site name HALBERTON STW_SSO_HALBERTON EA ID / permit SBB01419 · 200927 Outlet location ST01131232 (OS grid reference) · View on Apple Maps WFD catchment Halberton Stream (GB108045014960) 2024 spills / hours 80 / 1,405 Long-term average 72.0 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement UWWTR improvement completed Volume & pollution Estimate from 824 hours spilling →	Halberton Stream	64	824	down 20%	100%
Yarcombe STW Inlet overflow at sewage works Sewage works Yarcombe Company site name YARCOMBE STW_SO_YARCOMBE EA ID / permit SBB01382 · NRA-SW-0273 Outlet location ST24720799 (OS grid reference) · View on Apple Maps WFD catchment Yarty (GB108045015130) 2024 spills / hours 58 / 535 Long-term average 47.8 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 822 hours spilling →	(S) Trib River Yarty	87	822	up 50%	100%
St Dennis Wastewater Treatment Work Storm tank at sewage works Sewage works St Dennis Wastewater Treatment Work Company site name ST DENNIS STW_SSO_ST DENNIS EA ID / permit SBB01129 · NRA-SW-3885 Outlet location SW94115764 (OS grid reference) · View on Apple Maps WFD catchment Upper River Fal (GB108048001390) 2024 spills / hours 124 / 1,929 Long-term average 170.3 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 817 hours spilling →	River Fal	65	817	down 48%	100%
Little Petherick WwTW Inlet overflow at sewage works Sewage works Little Petherick Company site name LITTLE PETHERICK STW_SO_WADEBRIDGE EA ID / permit SBB00696 · NRA-SW-3676 Outlet location SW91827258 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Camel Estuary 2024 spills / hours 107 / 909 Long-term average 71.1 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 816 hours spilling →	Trib of Little Petherick Creek	112	816	up 5%	100%
Crowndale Cottages CSO Overflow on sewer network Company site name CROWNDALE_CSO_TAVISTOCK EA ID / permit SBB00326 · 301885 Outlet location SX47377257 (OS grid reference) · View on Apple Maps WFD catchment Lower River Tavy (GB108047007840) 2024 spills / hours 60 / 229 Long-term average 75.5 spills a year (monitored since 2016) High-spill reason (company) Not asset maintenance - hydraulic capacity Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Sep Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 815 hours spilling →	Trib of the River Tavy	72	815	up 20%	75%
Buckfastleigh STW Inlet overflow at sewage works Sewage works Buckfastleigh Company site name KILBURY STW_SO_BUCKFASTLEIGH EA ID / permit SBB00179 · NRA-SW-5004 Outlet location SX75136581 (OS grid reference) · View on Apple Maps WFD catchment Dart (GB108046008350) Bathing water Steamer Quay, Dart Estuary 2024 spills / hours 126 / 1,233 Long-term average 114.2 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 803 hours spilling →	River Dart	93	803	down 26%	100%
Stoke Climsland STW Inlet overflow at sewage works Sewage works Stoke Climsland Company site name STOKE CLIMSLAND STW_SO_STOKE CLIMSLAND EA ID / permit SBB01176 · NRA-SW-6743 Outlet location SX35857400 (OS grid reference) · View on Apple Maps WFD catchment Lower River Tamar (GB108047007860) 2024 spills / hours 102 / 590 Long-term average 94.1 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 802 hours spilling →	(S) Luckett Stream	105	802	up 3%	100%
Bodmin Nanstallon WwTW Storm tank at sewage works Sewage works Bodmin Nanstallon Company site name NANSTALLON STW_SSO_BODMIN EA ID / permit SBB00126 · NRA-SW-6959 Outlet location SX04336735 (OS grid reference) · View on Apple Maps WFD catchment Lower River Camel (GB108049000190) Shellfish water Camel Estuary 2024 spills / hours 92 / 1,625 Long-term average 49.7 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 791 hours spilling →	River Camel/St Lawrence Str	47	791	down 49%	100%
Ernesettle Sewage Treatment Works Storm tank at sewage works Sewage works Ernesettle Company site name ERNESETTLE STW_SSO_PLYMOUTH EA ID / permit SBB00420 · 301142 Outlet location SX44246023 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 49 / 840 Long-term average 61.1 spills a year (monitored since 2016) High-spill reason (company) Performance - SW Infiltration Monitor below 90% Sensor failure / issue · Resolved - May Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 791 hours spilling →	River Tamar (E)	47	791	down 4%	89%
Liskeard STW Storm tank at sewage works Sewage works Liskeard Company site name LODGEHILL STW_SSO_LISKEARD EA ID / permit SBB00693 · NRA-SW-3789 Outlet location SX24166306 (OS grid reference) · View on Apple Maps WFD catchment East Looe River (GB108048001440) Bathing water East Looe 2024 spills / hours 64 / 621 Long-term average 62.9 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 789 hours spilling →	East Looe River	73	789	up 14%	97%
Exmouth Sewage Treatment Works Storm tank at sewage works Sewage works Exmouth Company site name MAER LANE STW_SSO_EXMOUTH EA ID / permit SBB00433 · 201965 Outlet location SY03797919 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Sandy Bay Shellfish water Exe Estuary 2024 spills / hours 65 / 748 Long-term average 52.8 spills a year (monitored since 2010) High-spill reason (company) Not asset maintenance - hydraulic capacity Monitor below 90% Capital / maintenance works affect EDM operation · Resolved - Nov Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 788 hours spilling →	Lyme Bay(C)	55	788	down 15%	88%
Scout Hut CSO Overflow on sewer network Company site name SCOUT HUT_CSO_STOKE GABRIEL EA ID / permit SBB01060 · 202853 Outlet location SX85025714 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Stoke Gabriel, Dart Estuary Shellfish water Dart 2024 spills / hours 77 / 1,121 Long-term average 30.5 spills a year High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 773 hours spilling →	River Dart Estuary(E)	51	773	down 34%	98%
Broadhembury Pumping Station Storm discharge at pumping station Company site name BROADHEMBURY SPS_PSCSOEO_BROADHEMBURY EA ID / permit SBB00164 · 201640 Outlet location ST09880467 (OS grid reference) · View on Apple Maps WFD catchment Tale (GB108045009200) 2024 spills / hours 56 / 679 Long-term average 55.4 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 769 hours spilling →	River Tale	47	769	down 16%	100%
Higher Clovelly WwTW Inlet overflow at sewage works Sewage works Higher Clovelly Company site name HIGHER CLOVELLY STW_SO_CLOVELLY CROSS EA ID / permit SBB00571 · DRA 1518 Outlet location SS30762520 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 52 / 740 Long-term average 43.5 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 768 hours spilling →	Stream to Mouthmill Beach	59	768	up 13%	100%
Moreleigh STW Inlet overflow at sewage works Sewage works Moreleigh Company site name MORELEIGH STW_SO_MORELEIGH EA ID / permit SBB00804 · NRA-SW-6964 Outlet location SX76385253 (OS grid reference) · View on Apple Maps WFD catchment Torr Bk (GB108046004920) 2024 spills / hours 123 / 982 Long-term average 96.6 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 765 hours spilling →	(S) Trib of Torr Brook	92	765	down 25%	100%
Derril SPS Storm discharge at pumping station Company site name PYWORTHY SPST_PSCSOEO_DERRIL EA ID / permit SBB00362 · 301649 Outlet location SS30740375 (OS grid reference) · View on Apple Maps WFD catchment Derril Water (GB108047008070) 2024 spills / hours 79 / 564 Long-term average 71.8 spills a year (monitored since 2022) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 754 hours spilling →	River Derril (S)	89	754	up 13%	100%
Middle Marwood WwTW Storm tank at sewage works Sewage works Middle Marwood Company site name MIDDLE MARWOOD STW_SSO_MARWOOD EA ID / permit SBB00770 · 203312 Outlet location SS53313739 (OS grid reference) · View on Apple Maps WFD catchment Knowl Water (GB108050020020) 2024 spills / hours 101 / 2,284 Long-term average 91.3 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 744 hours spilling →	Knowle Wter & Mid Marwood Strm	38	744	down 62%	100%
Blackbrook-CSO-Princetown Overflow on sewer network Company site name BLACKBROOK NORTH_CSO_PRINCETOWN EA ID / permit SBB00119 · 201856 Outlet location SX59097423 (OS grid reference) · View on Apple Maps WFD catchment Blackbrook River (GB108046008370) 2024 spills / hours 170 / 2,476 Long-term average 119.8 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 723 hours spilling →	Black Brook River (S)	117	723	down 31%	94%
Efford Marsh CSO Overflow on sewer network Company site name EFFORD MARSH_CSO_PLYMOUTH EA ID / permit SBB00406 · 301675 Outlet location SX51425684 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Plymouth Hoe East 2024 spills / hours 110 / 2,130 Long-term average 54.9 spills a year (monitored since 2018) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 718 hours spilling →	Leigham Mill Stream	61	718	down 45%	100%
Ladock Valley STW Storm tank at sewage works Sewage works Ladock Valley Company site name LADOCK VALLEY STW_SSO_TRESILLIAN EA ID / permit SBB00651 · 302508 Outlet location SW87094704 (OS grid reference) · View on Apple Maps WFD catchment Tresillian River (Lower) (GB108048002350) Shellfish water Fal Estuary 2024 spills / hours 76 / 891 Long-term average 55.3 spills a year (monitored since 2010) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 716 hours spilling →	Tresillian River Estuary(E)	55	716	down 28%	100%
Southern Pumping Station Storm discharge at pumping station Company site name LOWER CLOVELLY SOUTHERN SPST_PSCSOEO_CLO EA ID / permit SBB01107 · 203576 Outlet location SS32022470 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 53 / 699 Long-term average 63.0 spills a year (monitored since 2016) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 709 hours spilling →	Clovelly Bay (Coastal Waters)	54	709	up 2%	100%
Totnes STW Inlet overflow at sewage works Sewage works Totnes Company site name TOTNES STW_SSO_TOTNES EA ID / permit SBB01264 · 203080 Outlet location SX80716101 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Steamer Quay, Dart Estuary Shellfish water Dart 2024 spills / hours 177 / 1,213 Long-term average 97.6 spills a year High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 698 hours spilling →	Dart Estuary(E)	123	698	down 31%	100%
The Lizard Pumping Station Storm discharge at pumping station Company site name THE LIZARD SPST_PSCSOEO_CHURCH COVE EA ID / permit SBB01231 · 302944 Outlet location SW72041276 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 69 / 1,030 Long-term average 59.4 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 694 hours spilling →	English Channel (Church Cove )	54	694	down 22%	100%

Sewage treatment works

Storm tanks and inlet overflows at each South West Water sewage works. The figures are 2025 spills.

← All water companies · Contains Environment Agency data licensed under the Open Government Licence v3.0. How to read the data.