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
Swanvale Pumping Station Storm discharge at pumping station Company site name SWANVALE SPS_PSCSOEO_FALMOUTH EA ID / permit SBB01198 · 301669 Outlet location SW80483056 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Swanpool 2024 spills / hours 77 / 1,244 Long-term average 24.1 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 690 hours spilling →	Falmouth Bay/Trib Bickland Wat	42	690	down 45%	100%
Newham Wastewater Treatment Works Storm tank at sewage works Sewage works Newham Company site name NEWHAM STW_SSO_TRURO EA ID / permit SBB01287 · 302707 Outlet location SW83414329 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Fal Estuary 2024 spills / hours 57 / 706 Long-term average 34.6 spills a year (monitored since 2012) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 669 hours spilling →	Truro River	51	669	down 11%	100%
Praze Tank CSO Overflow on sewer network Company site name PRAZE TANK_CSO_PENRYN EA ID / permit SBB00981 · 302302 Outlet location SW78103481 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Fal Estuary 2024 spills / hours 61 / 577 Long-term average 49.4 spills a year (monitored since 2017) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 663 hours spilling →	Praze Stream	49	663	down 20%	94%
Playing Fields Pumping Station Storm discharge at pumping station Company site name PLAYING FIELDS_PSCSOEO_CALSTOCK EA ID / permit SBB00944 · 301614 Outlet location SX43636845 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 114 / 667 Long-term average 101.0 spills a year (monitored since 2017) 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 661 hours spilling →	River Tamar (Estuarine)	73	661	down 36%	100%
Compton Castle CSO Overflow on sewer network Company site name COMPTON CASTLE_CSO_COMPTON EA ID / permit SBB00301 · 201791 Outlet location SX86496533 (OS grid reference) · View on Apple Maps WFD catchment Aller Brook (GB108046005340) Shellfish water Teign Estuary 2024 spills / hours 144 / 2,069 Long-term average 119.6 spills a year (monitored since 2017) High-spill reason (company) Not asset maintenance - hydraulic capacity Monitor below 90% Sensor failure / issue · Resolved - Mar Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Env Act (SODRP) improvement ongoing, UWWTR improvement ongoing Volume & pollution Estimate from 659 hours spilling →	Trib of Aller Brook	69	659	down 52%	79%
Modbury Wastewater Treatment Works Storm tank at sewage works Sewage works Modbury Company site name MODBURY STW_SSO_MODBURY EA ID / permit SBB00793 · SWWA 2259 Outlet location SX65375136 (OS grid reference) · View on Apple Maps WFD catchment Ayleston Brook (GB108046005020) Bathing water Mothecombe; Coastguards Beach, Erme Estuary 2024 spills / hours 86 / 702 Long-term average 57.4 spills a year (monitored since 2015) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement ongoing Volume & pollution Estimate from 657 hours spilling →	Ayleston Brook (S)	54	657	down 37%	100%
Ugborough STW Storm tank at sewage works Sewage works Ugborough Company site name UGBOROUGH STW_SSO_UGBOROUGH EA ID / permit SBB01295 · NRA-SW-6965 Outlet location SX67535540 (OS grid reference) · View on Apple Maps WFD catchment Lud Brook (GB108046005110) 2024 spills / hours 17 / 188 Long-term average 17.2 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 654 hours spilling →	(S) Trib of Lud Brook	38	654	up 124%	100%
Torcross Pumping Station Storm discharge at pumping station Company site name TORCROSS SPST_PSCSOEO_TORCROSS EA ID / permit SBB01256 · 203035 Outlet location SX82414170 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Slapton Sands Torcross Shellfish water Start Bay 2024 spills / hours 68 / 1,249 Long-term average 51.1 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 654 hours spilling →	Start Bay (C)	40	654	down 41%	100%
Black Torrington WwTW Inlet overflow at sewage works Sewage works Black Torrington Company site name BLACK TORRINGTON STW_SO_BLACK TORRINGTON EA ID / permit SBB00117 · 200364 Outlet location SS46940598 (OS grid reference) · View on Apple Maps WFD catchment Torridge (Combe Lake to Lew) (GB108050013930) 2024 spills / hours 116 / 806 Long-term average 129.8 spills a year (monitored since 2019) 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 636 hours spilling →	River Torridge (and Trib of)	102	636	down 12%	97%
Town Quay Pumping Station Storm discharge at pumping station Company site name TOWN QUAY SPST_PSCSOEO_FOWEY EA ID / permit SBB01268 · 302775 Outlet location SX12665166 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Readymoney Cove Shellfish water Fowey 2024 spills / hours 264 / 711 Long-term average 170.6 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, Operational improvement completed Volume & pollution Estimate from 635 hours spilling →	River Fowey Estuary (E)	198	635	down 25%	100%
Helebridge WwTW Storm tank at sewage works Sewage works Helebridge Company site name HELEBRIDGE STW_SSO_BUDE EA ID / permit SBB00560 · 301299 Outlet location SS18910639 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 59 / 961 Long-term average 27.3 spills a year (monitored since 2019) High-spill reason (company) Performance - SW Infiltration Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Sep Investigation No investigation activity in reporting period Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 633 hours spilling →	Bude Bay (Atlantic Ocean)	39	633	down 34%	52%
Meeth STW Inlet overflow at sewage works Sewage works Meeth Company site name MEETH STW_SSO_MEETH EA ID / permit SBB00758 · NRA-SW-0003 Outlet location SS54580795 (OS grid reference) · View on Apple Maps WFD catchment Little Mere River (GB108050014190) 2024 spills / hours 103 / 1,104 Long-term average 43.8 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 629 hours spilling →	Unnamed Watercourse	70	629	down 32%	100%
Harrowbarrow WwTW Inlet overflow at sewage works Sewage works Harrowbarrow Company site name HARROW BARROW STW_SO_CALLINGTON EA ID / permit SBB01381 · NRA-SW-0227 Outlet location SX40296973 (OS grid reference) · View on Apple Maps WFD catchment Cotehele Stream (GB108047004070) 2024 spills / hours 79 / 356 Long-term average 60.3 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 628 hours spilling →	(S)Unnamed Trib River Tamar	68	628	down 14%	99%
Little Silver Pumping Station Storm discharge at pumping station Company site name LITTLE SILVER SPST_PSCSOEO_TIVERTON EA ID / permit SBB00697 · 203078 Outlet location SS95441208 (OS grid reference) · View on Apple Maps WFD catchment Lowman (GB108045015030) 2024 spills / hours 113 / 972 Long-term average 89.5 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 Env Act (SODRP) improvement ongoing, UWWTR improvement ongoing Volume & pollution Estimate from 622 hours spilling →	River Lowman	74	622	down 35%	100%
Gittisham Pumping Station Storm discharge at pumping station Company site name GITTISHAM SPST_PSCSOEO_GITTISHAM EA ID / permit SBB00490 · 201142 Outlet location SY13429887 (OS grid reference) · View on Apple Maps WFD catchment Lower River Otter (GB108045009170) 2024 spills / hours 82 / 930 Long-term average 68.3 spills a year (monitored since 2019) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 622 hours spilling →	Tributary of River Otter	67	622	down 18%	100%
Lewdown Wastewater Treatment Works Inlet overflow at sewage works Sewage works Lewdown Company site name LEWDOWN STW_SO_LEWDOWN EA ID / permit SBB00686 · NRA-SW-6982 Outlet location SX44788747 (OS grid reference) · View on Apple Maps WFD catchment Thrushel (GB108047008010) 2024 spills / hours 48 / 411 Long-term average 67.7 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 621 hours spilling →	Tributary of River Thrushel	70	621	up 46%	100%
St Dennis Wastewater Treatment Work Inlet overflow at sewage works Sewage works St Dennis Wastewater Treatment Work Company site name ST DENNIS STW_SO_ST DENNIS EA ID / permit SBB01128 · NRA-SW-3885 Outlet location SW94115764 (OS grid reference) · View on Apple Maps WFD catchment Upper River Fal (GB108048001390) 2024 spills / hours 129 / 1,253 Long-term average 92.5 spills a year (monitored since 2019) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 617 hours spilling →	River Fal	97	617	down 25%	100%
Maer Pumping Station & Tank CSO Storm discharge at pumping station Company site name MAER ROAD SPST_PSCSOEO_EXMOUTH EA ID / permit SBB00736 · 200126/PC/01 Outlet location SY01117968 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Exmouth Shellfish water Exe Estuary 2024 spills / hours 76 / 871 Long-term average 52.1 spills a year (monitored since 2010) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 612 hours spilling →	English Channel	51	612	down 33%	100%
Latchley STW Inlet overflow at sewage works Sewage works Latchley Company site name LATCHLEY STW_SO_GUNNISLAKE EA ID / permit SBB00673 · 302129 Outlet location SX40837397 (OS grid reference) · View on Apple Maps WFD catchment Lower River Tamar (GB108047007860) 2024 spills / hours 119 / 1,654 Long-term average 90.8 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 604 hours spilling →	River Tamar (S)	42	604	down 65%	99%
Chittlehampton WwTW Storm tank at sewage works Sewage works Chittlehampton Company site name CHITTLEHAMPTON STW_SSO_CHITTLEHAMPTON EA ID / permit SBB00250 · NRA-SW-7809 Outlet location SS63502521 (OS grid reference) · View on Apple Maps WFD catchment Hawkridge Brook (GB108050014520) 2024 spills / hours 80 / 724 Long-term average 110.1 spills a year (monitored since 2017) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 599 hours spilling →	Trib of Hawkbridge Brook	60	599	down 25%	100%
Winsford Pscso/EO Storm discharge at pumping station Company site name WINSFORD SPST_PSCSOEO_WINSFORD EA ID / permit SBB01369 · 203228 Outlet location SS90723483 (OS grid reference) · View on Apple Maps WFD catchment Exe (Source to Quarme) (GB108045020930) 2024 spills / hours 66 / 892 Long-term average 51.4 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 597 hours spilling →	River Exe(S)	45	597	down 32%	95%
WwTW at Morchard Bishop Inlet overflow at sewage works Sewage works At Morchard Bishop Company site name MORCHARD BISHOP STW_SO_MORCHARD BISHOP EA ID / permit SBB01380 · 003126/SF/01 Outlet location SS76380765 (OS grid reference) · View on Apple Maps WFD catchment Knighty Brook (GB108050008290) 2024 spills / hours 152 / 777 Long-term average 126.0 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 593 hours spilling →	Tributary of the Pepper Lake	124	593	down 18%	98%
Glenholt Pumping Station Overflow on sewer network Company site name GLENHOLT SPS_PSCSOEO_PLYMOUTH EA ID / permit SBB00493 · 301592 Outlet location SX50886104 (OS grid reference) · View on Apple Maps WFD catchment Lower River Plym (GB108047004040) Bathing water Plymouth Hoe East 2024 spills / hours 70 / 571 Long-term average 83.3 spills a year (monitored since 2016) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, UWWTR improvement ongoing Volume & pollution Estimate from 593 hours spilling →	Trib of the River Plym	67	593	down 4%	100%
Burrington STW Inlet overflow at sewage works Sewage works Burrington Company site name BURRINGTON STW_SO_BURRINGTON EA ID / permit SBB00194 · DRA 1437 Outlet location SS63571679 (OS grid reference) · View on Apple Maps WFD catchment Mully Brook (GB108050014310) 2024 spills / hours 144 / 884 Long-term average 117.0 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 588 hours spilling →	Trib of Mully Brook	127	588	down 12%	100%
Railway Station Combined Sewer of Overflow on sewer network Company site name RAILWAY STATION_CSO_AXMINSTER EA ID / permit SBB01014 · DRA 1563 Outlet location SY29279834 (OS grid reference) · View on Apple Maps WFD catchment Lower Axe (GB108045008870) 2024 spills / hours 74 / 660 Long-term average 62.8 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 587 hours spilling →	River Axe	68	587	down 8%	100%
Falmouth STW Inlet & Storm PS Inlet overflow at sewage works Sewage works Falmouth And Ps Company site name FALMOUTH STW_SSO_FALMOUTH EA ID / permit SBB00440 · 302999 Outlet location SW82643206 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Fal Estuary 2024 spills / hours 31 / 418 Long-term average 29.9 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation No investigation activity in reporting period Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 582 hours spilling →	Penryn River(E)	38	582	up 23%	100%
Culmstock Sewage Treatment Works Inlet overflow at sewage works Sewage works Culmstock Company site name CULMSTOCK STW_SO_CULMSTOCK EA ID / permit SBB00342 · NRA-SW-3571 Outlet location ST09921368 (OS grid reference) · View on Apple Maps WFD catchment Middle Culm (GB108045014980) 2024 spills / hours 50 / 324 Long-term average 60.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 581 hours spilling →	River Culm	68	581	up 36%	100%
Bradworthy WwTW SSO Storm tank at sewage works Sewage works Bradworthy Company site name BRADWORTHY STW_SSO_BRADWORTHY EA ID / permit SBB00143 · NRA-SW-1058 Outlet location SS32991354 (OS grid reference) · View on Apple Maps WFD catchment Waldon (GB108050014270) 2024 spills / hours 143 / 739 Long-term average 143.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Jun Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 579 hours spilling →	Trib of River Torridge	109	579	down 24%	87%
Mitchell Pumping Station Storm discharge at pumping station Company site name MITCHELL SPST_PSCSOEO_TRURO EA ID / permit SBB00792 · 302286 Outlet location SW85675486 (OS grid reference) · View on Apple Maps WFD catchment Benny Stream (GB108049000210) 2024 spills / hours 69 / 811 Long-term average 48.5 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 578 hours spilling →	Benny Stream(S)	48	578	down 30%	99%
Horslears Pumping Station Storm discharge at pumping station Company site name HORSLEARS SPST_PSCSOEO_AXMINSTER EA ID / permit SBB00599 · 203701 Outlet location SY28819773 (OS grid reference) · View on Apple Maps WFD catchment Lower Axe (GB108045008870) 2024 spills / hours 61 / 526 Long-term average 57.4 spills a year High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 577 hours spilling →	River Axe(S)	64	577	up 5%	100%
Bratton Clovelly WwTW CSO Inlet overflow at sewage works Sewage works Bratton Clovelly Company site name BRATTON CLOVELLY STW_SO_BRATTON CLOVELY EA ID / permit SBB00146 · NRA-SW-1061 Outlet location SX46749172 (OS grid reference) · View on Apple Maps WFD catchment Thrushel (GB108047008010) 2024 spills / hours 115 / 639 Long-term average 110.8 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 574 hours spilling →	Trib of River Thrushel	104	574	down 10%	100%
Ludgvan School CSO Overflow on sewer network Company site name LUDGVAN SCHOOL_CSO_CROWLAS EA ID / permit SBB00721 · 302301/CS/01 Outlet location SW51313307 (OS grid reference) · View on Apple Maps WFD catchment Marazion River (GB108048002110) 2024 spills / hours 33 / 231 Long-term average 19.7 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation No investigation activity in reporting period Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 569 hours spilling →	Ludgvan Stream	47	569	up 42%	100%
Watergate Bay Pumping Station Storm discharge at pumping station Company site name WATERGATE SPS_PSCSOEO_WATERGATE BAY EA ID / permit SBB01318 · 301320 Outlet location SW84236493 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Watergate Bay 2024 spills / hours 32 / 443 Long-term average 20.5 spills a year (monitored since 2010) Investigation No investigation activity in reporting period Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 567 hours spilling →	Stream/Atlantic Ocean (S)	27	567	down 16%	100%
Perranuthnoe Pumping Station Storm discharge at pumping station Company site name PERRANUTHNOE SPS_PSCSOEO_MARAZION EA ID / permit SBB00929 · 300828 Outlet location SW53522914 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Perranuthnoe 2024 spills / hours 73 / 860 Long-term average 60.9 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 566 hours spilling →	(C) Mounts Bay	50	566	down 32%	100%
Colyford Pscso/EO Storm discharge at pumping station Company site name COLYFORD SPST_PSCSOEO_COLYFORD EA ID / permit SBB00290 · 201643 Outlet location SY25359266 (OS grid reference) · View on Apple Maps WFD catchment Umborne Brook (GB108045008880) 2024 spills / hours 69 / 593 Long-term average 43.5 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 557 hours spilling →	River Coly(S)	64	557	down 7%	100%
Fowey Wastewater Treatment Works Storm tank at sewage works (with treatment) Sewage works Fowey Company site name FOWEY STW_SSO_FOWEY EA ID / permit SBB00475 · 302530 Outlet location SX12765233 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Readymoney Cove Shellfish water Fowey Treatment UV (Ultraviolet) 2024 spills / hours 91 / 765 Long-term average 156.9 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 557 hours spilling →	Fowey Estuary (E)	72	557	down 21%	100%
Exford STW Inlet overflow at sewage works Sewage works Exford Company site name EXFORD STW_SO_EXFORD EA ID / permit SBB00432 · NRA-SW-3496 Outlet location SS85673816 (OS grid reference) · View on Apple Maps WFD catchment Exe (Source to Quarme) (GB108045020930) 2024 spills / hours 43 / 302 Long-term average 34.6 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed Improvement UWWTR improvement completed Volume & pollution Estimate from 552 hours spilling →	River Exe	39	552	down 9%	100%
Ipplepen Wastewater Treatment Works Storm tank at sewage works Sewage works Ipplepen Company site name IPPLEPEN STW_SSO_IPPLEPEN EA ID / permit SBB00615 · 203406 Outlet location SX82816676 (OS grid reference) · View on Apple Maps WFD catchment Am Brook (GB108046005210) 2024 spills / hours 66 / 822 Long-term average 48.7 spills a year (monitored since 2019) 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 550 hours spilling →	Halwell Stream	41	550	down 38%	95%
Ford & Fairy Cross STW Storm tank at sewage works Sewage works Ford And Fairy Cross Company site name FORD AND FAIRY CROSS STW_SSO_FORD EA ID / permit SBB00466 · 203909 Outlet location SS41082451 (OS grid reference) · View on Apple Maps WFD catchment Upper River Yeo (Bideford) (GB108050014470) 2024 spills / hours 112 / 810 Long-term average 72.3 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 549 hours spilling →	Trib of River Yeo(S)	81	549	down 28%	100%
Torpoint Wastewater Treatment Works Inlet overflow at sewage works Sewage works Torpoint Company site name TORPOINT STW_SO_TORPOINT EA ID / permit SBB01257 · NRA-SW-6990 Outlet location SX41475405 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 55 / 517 Long-term average 42.4 spills a year (monitored since 2017) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement ongoing Volume & pollution Estimate from 548 hours spilling →	St John'S Lake (Estuarine)	57	548	up 4%	100%
Sampford Peverell WwTW Storm tank at sewage works Sewage works Sampford Peverell Company site name SAMPFORD PEVERELL STW_SSO_SAMPFORD P EA ID / permit SBB01048 · DRA 20 Outlet location ST03871336 (OS grid reference) · View on Apple Maps WFD catchment Spratford Stream (GB108045015020) 2024 spills / hours 94 / 1,550 Long-term average 97.6 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 546 hours spilling →	Spratford Stream	45	546	down 52%	100%
South Molton WwTW Inlet overflow at sewage works Sewage works South Molton Company site name SOUTH MOLTON STW_SO_SOUTH MOLTON EA ID / permit SBB01100 · NRA-SW-5654 Outlet location SS72252572 (OS grid reference) · View on Apple Maps WFD catchment Mole (Yeo to Burcombe Stream) (GB108050014130) 2024 spills / hours 108 / 506 Long-term average 117.6 spills a year (monitored since 2017) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 540 hours spilling →	River Mole	118	540	up 9%	98%
Honda Garage CSO Overflow on sewer network Company site name OPP 447 WOLSELEY RD_CSO_PLYMOUTH EA ID / permit SBB00588 · 302610 Outlet location SX45195748 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 74 / 884 Long-term average 37.5 spills a year High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 534 hours spilling →	Weston Mill Stream(E)	43	534	down 42%	100%
Atherington WwTW CSO Inlet overflow at sewage works Sewage works Atherington Company site name ATHERINGTON STW_SO_ATHERINGTON EA ID / permit SBB00056 · NRA-SW-1008 Outlet location SS59332312 (OS grid reference) · View on Apple Maps WFD catchment Taw (River Mole to Estuary) (GB108050014530) 2024 spills / hours 69 / 493 Long-term average 63.3 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 530 hours spilling →	Trib of Chantry Stream	60	530	down 13%	99%
Cheriton Bishop STW Storm tank at sewage works Sewage works Cheriton Bishop Company site name CHERITON BISHOP STW_SSO_CHERITON BISHOP EA ID / permit SBB00241 · NRA-SW-3560 Outlet location SX77579355 (OS grid reference) · View on Apple Maps WFD catchment Ford Brook (EXE) (GB108045009230) 2024 spills / hours 94 / 1,834 Long-term average 72.6 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 520 hours spilling →	Ford Brook(S)	40	520	down 57%	100%
Cross Street Pumping Station Storm discharge at pumping station Company site name CROSS STREET SPS_PSCSOEO_COMBE MARTIN EA ID / permit SBB00294 · 2675 Outlet location SS57754719 (OS grid reference) · View on Apple Maps WFD catchment Umber (GB108051020440) Bathing water Combe Martin 2024 spills / hours 72 / 955 Long-term average 48.4 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, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 518 hours spilling →	River Umber	35	518	down 51%	100%
Dartington B CSO Overflow on sewer network Company site name DARTINGTON SCH TWO_CSO_DARTINGTON EA ID / permit SBB00349 · 202963 Outlet location SX78706219 (OS grid reference) · View on Apple Maps WFD catchment Bidwell Brook (GB108046005160) Bathing water Steamer Quay, Dart Estuary Shellfish water Dart 2024 spills / hours 84 / 1,203 Long-term average 62.0 spills a year (monitored since 2017) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 508 hours spilling →	Bidwell Brook	45	508	down 46%	100%
Tolvaddon Downs CSO Overflow on sewer network Company site name TOLVADDON TANK_CSO_REDRUTH EA ID / permit SBB01249 · 301807 Outlet location SW65714169 (OS grid reference) · View on Apple Maps WFD catchment Red River (Upper) (GB108049000600) Bathing water Gwithian Towans; Godrevy Towans 2024 spills / hours 35 / 49 Long-term average 38.0 spills a year High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 505 hours spilling →	Tolvaddon Stream (S)	69	505	up 97%	100%
Tavistock College Playing Field Overflow on sewer network Company site name PLAYING FIELD_CSO_TAVISTOCK EA ID / permit SBB01210 · 301678 Outlet location SX47657343 (OS grid reference) · View on Apple Maps WFD catchment Lower River Tavy (GB108047007840) 2024 spills / hours 94 / 369 Long-term average 80.4 spills a year (monitored since 2017) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, UWWTR improvement ongoing Volume & pollution Estimate from 501 hours spilling →	River Tavy	80	501	down 15%	95%
Ashill STW_SSO_ASHILL Inlet overflow at sewage works Sewage works Ashill Ashill EA ID / permit SBB01432 · Unpermitted Outlet location ST08621179 (OS grid reference) · View on Apple Maps WFD catchment Sheldon Stream (GB108045014940) 2024 spills / hours 78 / 1,160 Long-term average 37.3 spills a year (monitored since 2023) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 499 hours spilling →	Sheldon Stream	34	499	down 56%	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.