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
Mylor Bridge WwTW Storm tank at sewage works Sewage works Mylor Bridge Company site name MYLOR STW_SSO_MYLOR BRIDGE EA ID / permit SBB00825 · 302505 Outlet location SW79933638 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Fal Estuary 2024 spills / hours 103 / 1,897 Long-term average 104.7 spills a year (monitored since 2016) 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 1,700 hours spilling →	Mylor Creek	83	1,700	down 19%	100%
Holsworthy (Derriton) STW Storm tank at sewage works Sewage works Holsworthy Company site name DERRITON STW_SSO_HOLSWORTHY EA ID / permit SBB00583 · NRA-SW-6975 Outlet location SS34050323 (OS grid reference) · View on Apple Maps WFD catchment Deer (GB108047013880) 2024 spills / hours 130 / 2,166 Long-term average 141.0 spills a year (monitored since 2018) 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 1,697 hours spilling →	Coles Stream (S)	111	1,697	down 15%	100%
Spreyton STW Storm tank at sewage works Sewage works Spreyton Company site name SPREYTON STW_SSO_SPREYTON EA ID / permit SBB01116 · 203380 Outlet location SX69859752 (OS grid reference) · View on Apple Maps WFD catchment Upper River Yeo (Lapford) (GB108050008270) 2024 spills / hours 152 / 2,466 Long-term average 96.8 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 1,684 hours spilling →	Coombe Stream(S)	113	1,684	down 26%	100%
Dolton Sewage Treatment Works Storm tank at sewage works Sewage works Dolton Company site name DOLTON STW_SSO_DOLTON EA ID / permit SBB00373 · 203161 Outlet location SS57371194 (OS grid reference) · View on Apple Maps WFD catchment Dolton Stream (GB108050014240) 2024 spills / hours 124 / 1,561 Long-term average 100.8 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 1,678 hours spilling →	Trib of River Torridge(S)	118	1,678	down 5%	100%
Brompton Regis STW Inlet overflow at sewage works Sewage works Brompton Regis Company site name BROMPTON REGIS STW_SO_BROMPTON REGIS EA ID / permit SBB00170 · 202189/CS/01 Outlet location SS95533120 (OS grid reference) · View on Apple Maps WFD catchment Pulham (GB108045020910) 2024 spills / hours 175 / 3,077 Long-term average 115.0 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 1,669 hours spilling →	Pulham River(S)	97	1,669	down 45%	100%
St Dominick WwTW Inlet overflow at sewage works Sewage works St Dominick Company site name ST DOMINICK STW_SO_CALLINGTON EA ID / permit SBB01131 · 303083 Outlet location SX42666697 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 131 / 1,482 Long-term average 118.3 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement ongoing Volume & pollution Estimate from 1,669 hours spilling →	River Tamar Estuary	93	1,669	down 29%	98%
Harberton WwTW Storm tank at sewage works Sewage works Harberton Company site name HARBERTON STW_SSO_HARBERTON EA ID / permit SBB00536 · NRA-SW-5295 Outlet location SX77715829 (OS grid reference) · View on Apple Maps WFD catchment Harbourne River (GB108046005170) 2024 spills / hours 164 / 3,046 Long-term average 150.5 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 1,660 hours spilling →	Harbeton Stream	116	1,660	down 29%	100%
Greenacres CSO Overflow on sewer network Company site name GREENACRES_CSO_CHAGFORD EA ID / permit SBB00517 · 201800 Outlet location SX69668748 (OS grid reference) · View on Apple Maps WFD catchment Teign (Upper) (GB108046008550) 2024 spills / hours 172 / 1,398 Long-term average 115.4 spills a year (monitored since 2018) High-spill reason (company) Not Applicable - Ongoing investigation Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,651 hours spilling →	Trib of the River Teign	158	1,651	down 8%	96%
Ivybridge STW Storm tank at sewage works Sewage works Ivybridge Company site name IVYBRIDGE STW_SSO_IVYBRIDGE 1 EA ID / permit SBB00617 · 203299 Outlet location SX63165566 (OS grid reference) · View on Apple Maps WFD catchment Erme (GB108046005200) Bathing water Mothecombe; Coastguards Beach, Erme Estuary 2024 spills / hours 105 / 2,270 Long-term average 84.4 spills a year (monitored since 2015) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,624 hours spilling →	River Erme	84	1,624	down 20%	100%
Beals Mill Pumping Station Storm discharge at pumping station Company site name BEALS MILL SPS_PSCSOEO_BEALS MILL EA ID / permit SBB00091 · 301644 Outlet location SX35897702 (OS grid reference) · View on Apple Maps WFD catchment Lower River Inny (GB108047007890) 2024 spills / hours 86 / 1,643 Long-term average 91.0 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 1,619 hours spilling →	A Tributary of River Inny	77	1,619	down 10%	100%
Bedford Bridge CSO Overflow on sewer network Company site name BEDFORD BRIDGE_CSO_HORRABRIDGE EA ID / permit SBB00093 · 300964 Outlet location SX50297037 (OS grid reference) · View on Apple Maps WFD catchment Walkham (GB108047007870) 2024 spills / hours 141 / 2,191 Long-term average 123.5 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 1,593 hours spilling →	River Walkham	111	1,593	down 21%	100%
Commonmoor STW Inlet overflow at sewage works Sewage works Commonmoor Company site name COMMON MOOR STW_SO_COMMON MOOR EA ID / permit SBB00299 · NRA-SW-1141 Outlet location SX23496926 (OS grid reference) · View on Apple Maps WFD catchment Fowey (Upper) (GB108048007650) 2024 spills / hours 160 / 2,246 Long-term average 89.0 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 1,589 hours spilling →	Trib of River Fowey	127	1,589	down 21%	100%
Menheniot WwTW Storm tank at sewage works Sewage works Menheniot Company site name MENHENIOT STW_SSO_MENHENIOT EA ID / permit SBB00761 · 15/48/171/P/3A Outlet location SX28436203 (OS grid reference) · View on Apple Maps WFD catchment Seaton (GB108048002320) Bathing water Seaton (Cornwall) 2024 spills / hours 121 / 1,942 Long-term average 72.0 spills a year (monitored since 2014) 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 1,575 hours spilling →	Tributary of the River Seaton	131	1,575	up 8%	100%
Lydford Wastewater Trtment Works Inlet overflow at sewage works Sewage works Lydford Wastewater Trtment Works Company site name LYDFORD STW_SO_LYDFORD EA ID / permit SBB00725 · 303089 Outlet location SX50858481 (OS grid reference) · View on Apple Maps WFD catchment Upper River Lyd (GB108047007750) 2024 spills / hours 147 / 1,989 Long-term average 130.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,573 hours spilling →	Trib Raddon Stream/Ground	133	1,573	down 10%	100%
St Austell North STW Storm tank at sewage works Sewage works St Austell North Company site name LUXULYAN STW_SSO_ST AUSTELL EA ID / permit SBB01119 · SWWA 146 Outlet location SX04325820 (OS grid reference) · View on Apple Maps WFD catchment Par River (Upper) (GB108048002310) Bathing water Par Sands 2024 spills / hours 94 / 1,679 Long-term average 68.5 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration 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 1,558 hours spilling →	(S) River Par	86	1,558	down 9%	99%
WwTW at Bradninch Storm tank at sewage works Sewage works At Bradninch Company site name BRADNINCH STW_SSO_BRADNINCH EA ID / permit SBB01379 · SWWA 683 Outlet location ST00570331 (OS grid reference) · View on Apple Maps WFD catchment Lower Culm (GB108045014970) 2024 spills / hours 126 / 2,493 Long-term average 104.7 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 1,549 hours spilling →	River Culm	98	1,549	down 22%	100%
Cobbaton STW Inlet overflow at sewage works Sewage works Cobbaton Company site name COBBATON STW_SO_COBBATON EA ID / permit SBB00283 · 203881 Outlet location SS62142613 (OS grid reference) · View on Apple Maps WFD catchment Hawkridge Brook (GB108050014520) 2024 spills / hours 109 / 1,986 Long-term average 105.0 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 1,542 hours spilling →	Hawkridge Brook(S)	84	1,542	down 23%	100%
Stoke Hill WwTW Inlet overflow at sewage works Sewage works Stoke Hill Company site name STOKE HILL STW_SO_CRAPSTONE EA ID / permit SBB01179 · 302908 Outlet location SX50576729 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 84 / 1,476 Long-term average 115.0 spills a year (monitored since 2017) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,538 hours spilling →	Milton Stream	92	1,538	up 10%	100%
Chudleigh WwTW Storm tank at sewage works Sewage works Chudleigh Company site name CHUDLEIGH STW_SSO_NEWTON ABBOT EA ID / permit SBB00255 · NRA-SW-6984 Outlet location SX86047934 (OS grid reference) · View on Apple Maps WFD catchment Teign (Lower) (GB108046008540) Shellfish water Teign Estuary 2024 spills / hours 125 / 2,021 Long-term average 118.4 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 Volume & pollution Estimate from 1,527 hours spilling →	River Teign	90	1,527	down 28%	100%
Knowle Wastewater Treatment Works Storm tank at sewage works Sewage works Knowle Company site name KNOWLE STW_SSO_BRAUNTON EA ID / permit SBB00650 · 202367 Outlet location SS49193839 (OS grid reference) · View on Apple Maps WFD catchment Lower Caen (GB108050020010) 2024 spills / hours 65 / 1,138 Long-term average 72.6 spills a year (monitored since 2017) 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 1,524 hours spilling →	Tributary of River Caen	82	1,524	up 26%	100%
Sheepwash WwTW Storm tank at sewage works Sewage works Sheepwash Company site name SHEEPWASH STW_SO_SHEEPWASH EA ID / permit SBB01076 · SWWA 496 Outlet location SS48480595 (OS grid reference) · View on Apple Maps WFD catchment Torridge (Combe Lake to Lew) (GB108050013930) 2024 spills / hours 131 / 1,450 Long-term average 116.3 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 1,519 hours spilling →	River Torridge	139	1,519	up 6%	100%
Ashreigny WwTW CSO Inlet overflow at sewage works Sewage works Ashreigny Company site name ASHREIGNEY STW_SO_ASHREIGNEY EA ID / permit SBB00054 · NRA-SW-1006 Outlet location SS62071383 (OS grid reference) · View on Apple Maps WFD catchment Mully Brook (GB108050014310) 2024 spills / hours 128 / 1,317 Long-term average 102.7 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 1,511 hours spilling →	Trib of Mully Brook	167	1,511	up 30%	97%
Chapel Car Park Pscso/EO Storm discharge at pumping station Company site name ST NEOT SPS_PSCSOEO_LISKEARD EA ID / permit SBB00230 · 301638 Outlet location SX18486781 (OS grid reference) · View on Apple Maps WFD catchment St Neot River (GB108048007640) 2024 spills / hours 81 / 1,318 Long-term average 63.0 spills a year (monitored since 2022) 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 1,489 hours spilling →	River Loveny (S)	82	1,489	up 1%	100%
Wembury WwTW Storm tank at sewage works Sewage works Wembury Company site name WEMBURY STW_SSO_WEMBURY EA ID / permit SBB01323 · 032738/FN/02 Outlet location SX50984832 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 104 / 2,230 Long-term average 68.9 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 1,485 hours spilling →	Wembury Bay	74	1,485	down 29%	100%
Merton WwTW CSO Inlet overflow at sewage works Sewage works Merton Company site name MERTON STW_SO_MERTON EA ID / permit SBB00762 · NRA-SW-1362 Outlet location SS52141159 (OS grid reference) · View on Apple Maps WFD catchment Upper River Mere (GB108050014260) 2024 spills / hours 64 / 754 Long-term average 90.4 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 1,461 hours spilling →	Trib of Little Mere River	144	1,461	up 125%	97%
Milton Abbot WwTW Inlet overflow at sewage works Sewage works Milton Abbot Company site name MILTON ABBOT STW_SSO_MILTON ABBOT EA ID / permit SBB00789 · NRA-SW-3402 Outlet location SX40257919 (OS grid reference) · View on Apple Maps WFD catchment Lower River Tamar (GB108047007860) 2024 spills / hours 125 / 2,249 Long-term average 122.4 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,455 hours spilling →	Tributary of the River Tamar	83	1,455	down 34%	100%
Sparkwell Wastewater Treatment Work Storm tank at sewage works Sewage works Sparkwell Wastewater Treatment Work Company site name SPARKWELL STW_SSO_SPARKWELL EA ID / permit SBB01111 · 15/47/1/P/9 Outlet location SX58115701 (OS grid reference) · View on Apple Maps WFD catchment Silverbridge Lake (GB108047004000) 2024 spills / hours 126 / 2,518 Long-term average 71.3 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 1,441 hours spilling →	Tributary of Silverbridge Lake	79	1,441	down 37%	100%
Ebford Pumping Station Storm discharge at pumping station Company site name ODHAMS WHARF SPS_PSCSOEO_EBFORD EA ID / permit SBB00401 · 202365 Outlet location SX97588794 (OS grid reference) · View on Apple Maps WFD catchment Lower Clyst (GB108045008750) Shellfish water Exe Estuary 2024 spills / hours 175 / 3,393 Long-term average 189.9 spills a year (monitored since 2016) 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 1,440 hours spilling →	River Clyst (Estuarine)	98	1,440	down 44%	100%
Buckfastleigh STW Storm tank at sewage works Sewage works Buckfastleigh Company site name KILBURY STW_SSO_BUCKFASTLEIGH EA ID / permit SBB00178 · NRA-SW-5003 Outlet location SX75136581 (OS grid reference) · View on Apple Maps WFD catchment Dart (GB108046008350) Bathing water Steamer Quay, Dart Estuary 2024 spills / hours 138 / 2,334 Long-term average 114.3 spills a year (monitored since 2019) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 1,406 hours spilling →	River Dart	90	1,406	down 35%	100%
Holne WwTW Inlet overflow at sewage works Sewage works Holne Company site name HOLNE STW_SO_HOLNE EA ID / permit SBB00581 · SWWA 2251 Outlet location SX70826856 (OS grid reference) · View on Apple Maps WFD catchment Dart (GB108046008350) 2024 spills / hours 144 / 1,862 Long-term average 129.0 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 1,405 hours spilling →	Holy Brook	117	1,405	down 19%	100%
St Merryn Combined Sewer Overflow Overflow on sewer network Company site name ST MERRYN_CSO_ST MERRYN EA ID / permit SBB01154 · 300592 Outlet location SW86847607 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Harlyn Bay 2024 spills / hours 121 / 1,822 Long-term average 67.7 spills a year (monitored since 2012) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 1,381 hours spilling →	Mother Iveys Bay (C)	107	1,381	down 12%	100%
Coulson Park Pumping Station Storm discharge at pumping station Company site name COULSONS PARK SPST_PSCSOEO_LOSTWITHIEL EA ID / permit SBB00311 · NRA-SW-5460 Outlet location SX10495942 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Fowey 2024 spills / hours 126 / 2,364 Long-term average 105.2 spills a year (monitored since 2010) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 1,372 hours spilling →	River Fowey (Estuarine)	78	1,372	down 38%	100%
Pelynt Wastewater Treatment Works Storm tank at sewage works Sewage works Pelynt Company site name PELYNT STW_SSO_PELYNT EA ID / permit SBB00918 · NRA-SW-4009 Outlet location SX20135488 (OS grid reference) · View on Apple Maps WFD catchment Polperro River (GB108048001980) 2024 spills / hours 99 / 1,504 Long-term average 101.6 spills a year (monitored since 2020) 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 1,368 hours spilling →	Tributary of River Pol	84	1,368	down 15%	100%
Summerhill Pumping Station Storm discharge at pumping station Company site name SUMMERHILL SPS_PSCSOEO_ILSINGTON EA ID / permit SBB01191 · 201582 Outlet location SX81917448 (OS grid reference) · View on Apple Maps WFD catchment Liverton Brook (GB108046008440) Shellfish water Teign Estuary 2024 spills / hours 98 / 1,482 Long-term average 90.3 spills a year (monitored since 2016) 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 1,364 hours spilling →	Liverton Brook	87	1,364	down 11%	100%
Weare Giffard WwTW Inlet overflow at sewage works Sewage works Weare Giffard Company site name WEARE GIFFARD STW_SO_WEARE GIFFARD EA ID / permit SBB01324 · 202222 Outlet location SS47182204 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Shellfish water Taw-Torridge Estuary 2024 spills / hours 167 / 2,745 Long-term average 169.1 spills a year (monitored since 2017) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,341 hours spilling →	River Torridge	115	1,341	down 31%	100%
Honiton Wastewater Treatment Works Inlet overflow at sewage works Sewage works Honiton Company site name HONITON STW_SO_HONITON EA ID / permit SBB00591 · NRA-SW-3869 Outlet location ST15220094 (OS grid reference) · View on Apple Maps WFD catchment Middle River Otter (GB108045009180) 2024 spills / hours 150 / 1,091 Long-term average 117.2 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 1,329 hours spilling →	River Otter	148	1,329	down 1%	100%
Highampton Wastewater Trtment Works Storm tank at sewage works Sewage works Highampton Wastewater Trtment Works Company site name HIGHAMPTON STW_SSO_HATHERLEIGH EA ID / permit SBB00570 · 200411 Outlet location SS48510385 (OS grid reference) · View on Apple Maps WFD catchment Pulworthy Brook (GB108050008230) 2024 spills / hours 124 / 1,748 Long-term average 64.0 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 1,323 hours spilling →	Trib of Pulworthy Brook (S)	95	1,323	down 23%	100%
Trebullett STW Inlet overflow at sewage works Sewage works Trebullett Company site name TREBULLETT STW_SO_TREBULLETT EA ID / permit SBB01272 · NRA-SW-5050 Outlet location SX32257715 (OS grid reference) · View on Apple Maps WFD catchment Lower River Inny (GB108047007890) 2024 spills / hours 113 / 1,707 Long-term average 70.8 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 1,319 hours spilling →	The River Inny	95	1,319	down 16%	100%
Ilsham Valley Pumping Station Storm discharge at pumping station Company site name ILSHAM VALLEY SPST_PSCSOEO_TORQUAY EA ID / permit SBB00608 · 200977 Outlet location SX94946358 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment Bathing water Meadfoot 2024 spills / hours 135 / 2,015 Long-term average 107.6 spills a year (monitored since 2011) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 1,314 hours spilling →	English Channel(C)	104	1,314	down 23%	100%
South Petherwin Pscso/EO Storm discharge at pumping station Company site name SOUTH PETHERWIN SPS_PSCSOEO_LAUNCESTON EA ID / permit SBB01102 · 301580 Outlet location SX31628257 (OS grid reference) · View on Apple Maps WFD catchment Lowley Brook (GB108047007920) 2024 spills / hours 72 / 1,374 Long-term average 51.3 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 1,314 hours spilling →	Lowley Brook (S)	69	1,314	down 4%	100%
North Petherwin WwTW Inlet overflow at sewage works Sewage works North Petherwin Company site name NORTH PETHERWIN STW_SO_NORTH PETHERWIN EA ID / permit SBB00844 · NRA-SW-3765 Outlet location SX29398782 (OS grid reference) · View on Apple Maps WFD catchment Lower River Ottery (GB108047007981) 2024 spills / hours 83 / 987 Long-term average 150.6 spills a year (monitored since 2018) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,302 hours spilling →	River Ottery	74	1,302	down 11%	100%
Shebbear Wastewater Treatment Works Inlet overflow at sewage works Sewage works Shebbear Company site name SHEBBEAR STW_SSO_SHEBBEAR EA ID / permit SBB01075 · NRA-SW-3849 Outlet location SS42500910 (OS grid reference) · View on Apple Maps WFD catchment Torridge (Combe Lake to Lew) (GB108050013930) 2024 spills / hours 107 / 1,657 Long-term average 131.3 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 1,281 hours spilling →	River Torridge	91	1,281	down 15%	100%
St Leonards WwTW Storm tank at sewage works Sewage works St Leonards Company site name ST LEONARDS STW_SSO_LAUNCESTON EA ID / permit SBB01144 · NRA-SW-6981 Outlet location SX35108499 (OS grid reference) · View on Apple Maps WFD catchment Tamar (River Ottery to River Lyd) (GB108047007940) 2024 spills / hours 85 / 1,513 Long-term average 69.6 spills a year (monitored since 2018) 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 1,273 hours spilling →	River Tamar	74	1,273	down 13%	100%
South Brent WwTW Inlet overflow at sewage works Sewage works South Brent Company site name SOUTH BRENT STW_SO_SOUTH BRENT EA ID / permit SBB01097 · DRA 1062 Outlet location SX69755940 (OS grid reference) · View on Apple Maps WFD catchment Avon - Upper (GB108046004940) Shellfish water Bigbury and Avon 2024 spills / hours 95 / 1,804 Long-term average 87.3 spills a year (monitored since 2016) 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 1,268 hours spilling →	River Avon	66	1,268	down 31%	100%
Kingscott STW Inlet overflow at sewage works Sewage works Kingscott Company site name KINGSCOTT STW_SO_KINGSCOTT EA ID / permit SBB00643 · 200928 Outlet location SS54221785 (OS grid reference) · View on Apple Maps WFD catchment Whitsleigh Down Brook (GB108050014350) 2024 spills / hours 96 / 1,604 Long-term average 74.0 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 1,260 hours spilling →	(S) Dodscott Brook	84	1,260	down 13%	98%
Bridestowe WwTW Inlet overflow at sewage works Sewage works Bridestowe Company site name BRIDESTOWE STW_SSO_BRIDESTOWE EA ID / permit SBB00151 · NRA-SW-3794 Outlet location SX50008926 (OS grid reference) · View on Apple Maps WFD catchment Lew (Tamar) (GB108047007770) 2024 spills / hours 140 / 2,596 Long-term average 179.0 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 1,259 hours spilling →	River Lew	74	1,259	down 47%	100%
Belstone and South Tawton WwTW Storm tank at sewage works Sewage works Belstone And South Tawton Company site name SOUTH TAWTON STW_SSO_SOUTH TAWTON EA ID / permit SBB00096 · EPRDP3221GJ Outlet location SX64779488 (OS grid reference) · View on Apple Maps WFD catchment Taw (Source to Bullow Brook) (GB108050008250) 2024 spills / hours 90 / 1,441 Long-term average 93.7 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 1,253 hours spilling →	River Taw	69	1,253	down 23%	100%
Croyde Wastewater Treatment Works Inlet overflow at sewage works Sewage works Croyde Company site name CROYDE STW_SO_CROYDE EA ID / permit SBB00332 · 201127 Outlet location SS42234021 (OS grid reference) · View on Apple Maps WFD catchment Not part of a WFD catchment 2024 spills / hours 73 / 497 Long-term average 153.8 spills a year (monitored since 2017) High-spill reason (company) Performance - Asset configuration (e.g. PS/rising main/storm tanks) 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 1,253 hours spilling →	Croyde Bay (Coastal)	253	1,253	up 247%	100%
Kilkhampton WwTW Storm tank at sewage works Sewage works Kilkhampton Company site name KILKHAMPTON STW_SSO_KILKHAMPTON EA ID / permit SBB00630 · 15/49/30/P/10 Outlet location SS25031163 (OS grid reference) · View on Apple Maps WFD catchment Coombe Valley Stream (GB108049013760) 2024 spills / hours 131 / 2,204 Long-term average 113.3 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - hydraulic capacity Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 1,244 hours spilling →	Trib of Coombe Valley Stream	100	1,244	down 24%	100%
Moretonhampstead WwTW Storm tank at sewage works Sewage works Moretonhampstead Company site name MORETONHAMPSTEAD STW_SSO_MORETONHAMPSTD EA ID / permit SBB00807 · NRA-SW-3912 Outlet location SX76728503 (OS grid reference) · View on Apple Maps WFD catchment Wray Brook (GB108046008330) 2024 spills / hours 200 / 4,453 Long-term average 148.1 spills a year (monitored since 2017) High-spill reason (company) Performance - SW Infiltration Monitor below 90% telemetry or data archiving failure / issue · Resolved - Mar Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 1,222 hours spilling →	The Wray Brook	74	1,222	down 63%	79%

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.