Storm overflow register · 2025 annual return

Severn Trent Water storm overflows, 2025

Severn Trent Water reported 2,452 storm overflows in England for 2025. Together they recorded 36,471 spills over 200,361 hours, an average of 14.9 spills per overflow against 20.4 across England. That ranks 2 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 41% on 2024.

429 overflows did not spill · 72 spilled more than 60 times · 2,342 had monitors working for 90% of the year or more · 435 sewage treatment works with overflows

Hours spilling by month, 2025

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

All Severn Trent 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
Beeston (Lilac Grove) STW Storm tank at sewage works Sewage works Beeston Company site name BEESTON -LILAC GROVE STW (SSTO) EA ID / permit SVT00234 · T/62/45769/R Outlet location SK5409436648 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 65 / 584 Long-term average 84.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Installation set-up/design issue · Resolved - January after reporting year Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 699 hours spilling →	Pasture Lane Dyke	88	699	up 35%	86%
Belle Vale Combined Sewer Overflow Overflow on sewer network Company site name BELLE VALE - CORNGREAVES ROAD (CSO) EA ID / permit SVT00240 · S/06/56331/O Outlet location SO9519684756 (OS grid reference) · View on Apple Maps WFD catchment Stour (Worcs) source to conf Smestow Bk (GB109054044750) 2024 spills / hours 63 / 775 Long-term average 38.8 spills a year (monitored since 2020) 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 699 hours spilling →	River Stour	49	699	down 22%	100%
Bamford - Rose Gardens Terminal PS Storm discharge at pumping station Company site name BAMFORD - ROSE GARDENS SPS (SSO) EA ID / permit SVT00169 · T/38/40245/O Outlet location SK2033182605 (OS grid reference) · View on Apple Maps WFD catchment Noe from Peakshole Water to Derwent (GB104028057850) 2024 spills / hours 55 / 444 Long-term average 64.2 spills a year (monitored since 2021) 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 690 hours spilling →	River Noe	52	690	down 5%	100%
Haxey STW Storm tank at sewage works Sewage works Haxey Company site name HAXEY - GRAIZELOUND STW (SSTO) EA ID / permit SVT01094 · T/82/45052/R Outlet location SK7669498512 (OS grid reference) · View on Apple Maps WFD catchment Ferry Drain Catchment (trib of Trent) (GB104028058241) 2024 spills / hours 83 / 1,132 Long-term average 67.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 687 hours spilling →	Trib of Ferry Drain	51	687	down 39%	100%
Collingham STW Storm tank at sewage works Sewage works Collingham Company site name COLLINGHAM STW (SSTO) EA ID / permit SVT00617 · T/69/45554/R Outlet location SK8263662794 (OS grid reference) · View on Apple Maps WFD catchment The Fleet Upper Catchment (trib of Trent) (GB104028053430) 2024 spills / hours 25 / 333 Long-term average 32.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 679 hours spilling →	The Fleet	34	679	up 36%	100%
Coaley Sewage Treatment Works Storm tank at sewage works Sewage works Coaley Company site name COALEY STW (SSTO) EA ID / permit SVT00588 · S/20/26180/R Outlet location SO7563002160 (OS grid reference) · View on Apple Maps WFD catchment The Cam R source to conf Glos and Sharpness Canal (GB109054026550) 2024 spills / hours 114 / 1,515 Long-term average 68.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 670 hours spilling →	The River Cam	47	670	down 59%	100%
Tewkesbury STW Storm tank at sewage works Sewage works Tewkesbury Company site name TEWKESBURY STW (SSTO) EA ID / permit SVT02281 · S/17/26480/R Outlet location SO8812031860 (OS grid reference) · View on Apple Maps WFD catchment Avon - Tolsey Lane to conf R Severn (GB109054039800) 2024 spills / hours 41 / 551 Long-term average 46.3 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 669 hours spilling →	The Mill Avon	36	669	down 12%	96%
Wymondham Sewage Treatment Works Inlet overflow at sewage works Sewage works Wymondham Company site name WYMONDHAM (STW) EA ID / permit SVT02644 · T/54/45839/R Outlet location SK8503618389 (OS grid reference) · View on Apple Maps WFD catchment Wymondham Brook Catchment (trib of Langham Brook) (GB104028047540) 2024 spills / hours 105 / 1,832 Long-term average 59.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 669 hours spilling →	Tributary of River Wreake	43	669	down 59%	100%
Hognaston Sewage Treatment Works Inlet overflow at sewage works Sewage works Hognaston Company site name HOGNASTON STW (CSO) EA ID / permit SVT01157 · T/29/35579/R Outlet location SK2376649843 (OS grid reference) · View on Apple Maps WFD catchment Henmore Brook Catch (trib of R Dove) (GB104028052700) 2024 spills / hours 102 / 426 Long-term average 85.6 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 667 hours spilling →	Henmore Brook	61	667	down 40%	94%
Duffield STW Storm tank at sewage works Sewage works Duffield Company site name DUFFIELD STW (SSTO) EA ID / permit SVT00802 · T/44/08090/R Outlet location SK3537841387 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Amber to Bottle Brook (GB104028052310) 2024 spills / hours 115 / 1,032 Long-term average 128.8 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 657 hours spilling →	River Derwent	57	657	down 50%	99%
Kirk Langley STW Storm tank at sewage works (with treatment) Sewage works Kirk Langley Company site name KIRK LANGLEY STW (SSTO) EA ID / permit SVT01288 · T/47/46016/R Outlet location SK2931039009 (OS grid reference) · View on Apple Maps WFD catchment Mackworth Brook Catchment (trib of Markeaton Brook) (GB104028052840) Treatment Reed bed 2024 spills / hours 80 / 993 Long-term average 81.6 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 657 hours spilling →	Flagshaw Brook	63	657	down 21%	99%
Ashford - Buxton Road (CSO) Overflow on sewer network EA ID / permit SVT00445 · Unpermitted Outlet location SK1986569486 (OS grid reference) · View on Apple Maps WFD catchment Wye from Monk's Dale to Derwent (GB104028057820) 2024 spills / hours 55 / 537 Long-term average 55.6 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 642 hours spilling →	River Wye	42	642	down 24%	97%
Southwell Sewage Treatment Works Storm tank at sewage works Sewage works Southwell Company site name SOUTHWELL STW (SSTO) EA ID / permit SVT02123 · NPSWQD008782 Outlet location SK7420951453 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 141 / 1,774 Long-term average 97.4 spills a year (monitored since 2021) 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 639 hours spilling →	River Trent	58	639	down 59%	100%
Ashbourne STW Storm tank at sewage works Sewage works Ashbourne Company site name ASHBOURNE STW (SSTO) EA ID / permit SVT00118 · T/29/35728/R Outlet location SK1632846189 (OS grid reference) · View on Apple Maps WFD catchment Bentley Brook Catch (trib of Dove) (GB104028052750) 2024 spills / hours 28 / 248 Long-term average 20.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 639 hours spilling →	Bentley Brook	44	639	up 57%	100%
Malvern Sewage Treatment Works Storm tank at sewage works Sewage works Malvern Company site name MALVERN STW (SSTO) EA ID / permit SVT00180 · S/08/26522/R Outlet location SO8366045370 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf R Teme to conf R Avon (GB109054039760) 2024 spills / hours 148 / 2,237 Long-term average 93.6 spills a year (monitored since 2021) 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 637 hours spilling →	River Severn	57	637	down 61%	99%
Newton Solney (East) SPS Storm discharge at pumping station Company site name NEWTON SOLNEY - BLACKSMITHS LANE (SSO) EA ID / permit SVT01649 · T/24/12286/O Outlet location SK2801025950 (OS grid reference) · View on Apple Maps WFD catchment Trent - R Tame to R Dove (GB104028047180) 2024 spills / hours 134 / 1,917 Long-term average 104.7 spills a year (monitored since 2023) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 637 hours spilling →	River Trent (Non-Tidal)	69	637	down 49%	96%
Ridge Lane Mancetter STW Inlet overflow at sewage works Sewage works Ridge Lane Mancetter Company site name MANCETTER - RIDGE LANE STW (CSO) EA ID / permit SVT01888 · T/15/35759/R Outlet location SP2952794543 (OS grid reference) · View on Apple Maps WFD catchment Bourne - source to R Tame (GB104028042481) 2024 spills / hours 108 / 885 Long-term average 118.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 637 hours spilling →	Tributary of Bourne Brook	67	637	down 38%	100%
Long Whatton STW Storm tank at sewage works Sewage works Long Whatton Company site name LONG WHATTON STW (SSTO) EA ID / permit SVT01407 · T/57/08423/R Outlet location SK4918023330 (OS grid reference) · View on Apple Maps WFD catchment Long Whatton Brook Catchment (trib of Soar) (GB104028047170) 2024 spills / hours 74 / 602 Long-term average 101.5 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 626 hours spilling →	Long Whatton Brook	55	626	down 26%	100%
Eccleshall & Sturbridge STW Storm tank at sewage works Sewage works Eccleshall And Sturbridge Company site name ECCLESHALL AND STURBRIDGE STW (SSTO) EA ID / permit SVT00840 · T/02/35657/R Outlet location SJ8355329525 (OS grid reference) · View on Apple Maps WFD catchment Sow - Brockton Bk to Doxey Bk (GB104028047220) 2024 spills / hours 113 / 1,498 Long-term average 66.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 617 hours spilling →	River Sow	46	617	down 59%	100%
Buxton Wastewater Treatment Works Storm tank at sewage works Sewage works Buxton Company site name BUXTON STW (SSTO) EA ID / permit SVT00446 · T/39/45680/R Outlet location SK0674272868 (OS grid reference) · View on Apple Maps WFD catchment Wye from Source to Monk's Dale (GB104028058460) 2024 spills / hours 67 / 747 Long-term average 88.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 612 hours spilling →	River Wye	60	612	down 10%	99%
Holbury Crescent Pumping Station Storm discharge at pumping station Company site name WHITMINSTER - SCHOOL LANE (CSO) EA ID / permit SVT01162 · S/20/25538/O Outlet location SO7722008630 (OS grid reference) · View on Apple Maps WFD catchment Epney Rhyne - source to conf R Severn Estuary (GB109054032600) 2024 spills / hours 102 / 1,082 Long-term average 71.8 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 605 hours spilling →	Trib River Severn	53	605	down 48%	99%
Keyworth Sewage Treatment Works Storm tank at sewage works Sewage works Keyworth Company site name KEYWORTH STW (SSTO) EA ID / permit SVT01252 · T/62/45371/R Outlet location SK6051430320 (OS grid reference) · View on Apple Maps WFD catchment Fairham Brook Catchment (trib of Trent) (GB104028053150) 2024 spills / hours 60 / 671 Long-term average 66.3 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 604 hours spilling →	Tributary of Fairham Brook	46	604	down 23%	100%
Sutton Bonington STW Storm tank at sewage works Sewage works Sutton Bonington Company site name SUTTON BONINGTON STW (SSTO) EA ID / permit SVT02249 · T/57/46002/R Outlet location SK4990626232 (OS grid reference) · View on Apple Maps WFD catchment Soar from Long Whatton Brook to Trent (GB104028047212) 2024 spills / hours 156 / 1,857 Long-term average 91.4 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 Operational improvement completed Volume & pollution Estimate from 599 hours spilling →	Tributary of River Soar	48	599	down 69%	100%
Ludlow Sewage Treatment Works Storm tank at sewage works Sewage works Ludlow Company site name LUDLOW STW (SSTO) EA ID / permit SVT01443 · S/09/55809/R Outlet location SO5178673272 (OS grid reference) · View on Apple Maps WFD catchment Teme - conf R Onny to conf R Severn (GB109054044510) 2024 spills / hours 124 / 1,649 Long-term average 84.8 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement completed Volume & pollution Estimate from 583 hours spilling →	River Teme	59	583	down 52%	100%
Laverton Sewage Treatment Works Storm tank at sewage works Sewage works Laverton Company site name LAVERTON STW (CSO) EA ID / permit SVT01322 · S/18/25216/R Outlet location SP0703035874 (OS grid reference) · View on Apple Maps WFD catchment Isbourne - source to conf R Avon (GB109054039631) 2024 spills / hours 70 / 528 Long-term average 80.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 576 hours spilling →	Tributary of River Isbourne	59	576	down 16%	99%
Brailsford Sewage Treatment Works Inlet overflow at sewage works (with treatment) Sewage works Brailsford Company site name BRAILSFORD STW (SSTO) EA ID / permit SVT00325 · T/34/36002/R Outlet location SK2556040730 (OS grid reference) · View on Apple Maps WFD catchment Hilton Bk (trib of R Dove) (GB104028052870) Treatment Reed bed 2024 spills / hours 138 / 1,713 Long-term average 51.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 570 hours spilling →	Tributary of Brailsford Brook	74	570	down 46%	97%
Clay Cross Sewage Treatment Works Storm tank at sewage works Sewage works Clay Cross Company site name CLAY CROSS STW (SSTO) EA ID / permit SVT00570 · T/41/45710/R Outlet location SK3880062389 (OS grid reference) · View on Apple Maps WFD catchment Press Brook Catchment (trib of Amber) (GB104028052370) 2024 spills / hours 72 / 638 Long-term average 82.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 569 hours spilling →	Smithy Brook	60	569	down 17%	100%
Cherington STW Storm tank at sewage works Sewage works Cherington Company site name CHERINGTON STW (SSTO) EA ID / permit SVT00529 · S/14/26294/R Outlet location SP2890636900 (OS grid reference) · View on Apple Maps WFD catchment Stour (Warks) - source to conf Nethercote Bk (GB109054039860) 2024 spills / hours 131 / 2,397 Long-term average 110.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 568 hours spilling →	River Stour	44	568	down 66%	99%
Harby Sewage Treatment Works Storm tank at sewage works Sewage works Harby Company site name HARBY STW (SSTO) EA ID / permit SVT01062 · T/66/45609/R Outlet location SK7397430704 (OS grid reference) · View on Apple Maps WFD catchment Stroom Dyke Catchment (trib of Smite) (GB104028053030) 2024 spills / hours 85 / 1,276 Long-term average 72.8 spills a year (monitored since 2021) 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 566 hours spilling →	Tributary of Stroom Dyke	51	566	down 40%	100%
Longhope STW Storm tank at sewage works Sewage works Longhope Company site name LONGHOPE STW (SSTO) EA ID / permit SVT01410 · S/20/08537/R Outlet location SO6906017880 (OS grid reference) · View on Apple Maps WFD catchment Westbury Bk - source to mouth (GB109054032770) 2024 spills / hours 97 / 1,160 Long-term average 60.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 564 hours spilling →	Longhope Brook	44	564	down 55%	100%
Itchen Bank Sewage Treatment Works Storm tank at sewage works Sewage works Itchen Bank Company site name ITCHEN BANK STW (SSTO) EA ID / permit SVT01223 · S/12/26557/R Outlet location SP4067462821 (OS grid reference) · View on Apple Maps WFD catchment Itchen - conf R Stowe to conf R Leam (GB109054044110) 2024 spills / hours 121 / 1,834 Long-term average 74.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement completed Volume & pollution Estimate from 561 hours spilling →	River Itchen	53	561	down 56%	100%
Much Wenlock Sewage Treatment Works Storm tank at sewage works Sewage works Much Wenlock Company site name MUCH WENLOCK STW (SSTO) EA ID / permit SVT01592 · S/02/55942/R Outlet location SJ6296300596 (OS grid reference) · View on Apple Maps WFD catchment Much Wenlock-Farley Bk - source to conf R Severn (GB109054049390) 2024 spills / hours 75 / 784 Long-term average 54.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 559 hours spilling →	Shyte Brook	52	559	down 31%	97%
Laxton Sewage Treatment Works Inlet overflow at sewage works Sewage works Laxton Company site name LAXTON STW (CSO&EO) EA ID / permit SVT01326 · T/69/45349/R Outlet location SK7296166332 (OS grid reference) · View on Apple Maps WFD catchment Moorhouse Beck (Trib of Goosemoor Dyke) (GB104028058260) 2024 spills / hours 102 / 1,690 Long-term average 84.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 555 hours spilling →	Moorhouse Beck	54	555	down 47%	99%
Lower Lode Lane Pumping Station Storm discharge at pumping station Company site name TEWKESBURY - LOWER LODE (CSO) EA ID / permit SVT01432 · S/17/26249/O Outlet location SO8870032190 (OS grid reference) · View on Apple Maps WFD catchment Avon - Tolsey Lane to conf R Severn (GB109054039800) 2024 spills / hours 110 / 1,292 Long-term average 85.0 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 551 hours spilling →	Mill Avon	61	551	down 45%	100%
Aslockton Sewage Treatment Works Storm tank at sewage works Sewage works Aslockton Company site name ASLOCKTON - SSTO OVERFLOW-3PG EA ID / permit SVT00134 · T/67/45582/R Outlet location SK7268840586 (OS grid reference) · View on Apple Maps WFD catchment Car Dyke (GB104028052501) 2024 spills / hours 150 / 2,000 Long-term average 83.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 549 hours spilling →	Tributary of Car Dyke	45	549	down 70%	100%
Rowington Sewage Treatment Works Inlet overflow at sewage works Sewage works Rowington Company site name ROWINGTON STW (CSO) EA ID / permit SVT01913 · S/15/26102/R Outlet location SP1869769716 (OS grid reference) · View on Apple Maps WFD catchment Preston Bagot Bk - source to conf R Alne (GB109054043850) 2024 spills / hours 111 / 954 Long-term average 78.8 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 Operational improvement completed Volume & pollution Estimate from 546 hours spilling →	Kingswood Brook	45	546	down 59%	95%
Alvington - St Annes Well SPS Storm discharge at pumping station Company site name ALVINGTON - ST ANNES WELL (CSO) EA ID / permit SVT00070 · S/20/21755/O Outlet location SO6011000160 (OS grid reference) · View on Apple Maps WFD catchment Severn River and Trib Estuary (GB530905415402) 2024 spills / hours 85 / 1,218 Long-term average 56.2 spills a year (monitored since 2021) 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 538 hours spilling →	Cone Brook	51	538	down 40%	93%
Kemerton Pumping Station Storm discharge at pumping station Company site name KEMERTON SPS (CSO) EA ID / permit SVT01243 · S/17/26559/O Outlet location SO9419036020 (OS grid reference) · View on Apple Maps WFD catchment Carrant Bk - source to conf R Avon (GB109054039851) 2024 spills / hours 118 / 1,725 Long-term average 73.6 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 534 hours spilling →	Kemerton Brook	44	534	down 63%	100%
Twyning Sewage Treatment Works Storm tank at sewage works Sewage works Twyning Company site name TWYNING STW (SSTO) EA ID / permit SVT02361 · S/17/25353/R Outlet location SO9085236932 (OS grid reference) · View on Apple Maps WFD catchment Avon conf Workman Br, Evesham to conf R Severn (GB109054044403) 2024 spills / hours 149 / 1,883 Long-term average 98.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement UWWTR improvement ongoing, Operational improvement completed Volume & pollution Estimate from 533 hours spilling →	Tributary of River Avon	49	533	down 67%	100%
Lighthorne Heath STW Inlet overflow at sewage works (with treatment) Sewage works Lighthorne Heath Company site name LIGHTHORNE HEATH STW (SSTO) EA ID / permit SVT01361 · S/13/25884/R Outlet location SP3622256831 (OS grid reference) · View on Apple Maps WFD catchment Tach Bk - source to conf R Avon (GB109054043740) Treatment Reed bed 2024 spills / hours 86 / 419 Long-term average 42.2 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 530 hours spilling →	Tributary of Tach Brook	41	530	down 52%	100%
Westwood Brook STW Storm tank at sewage works Sewage works Westwood Brook Company site name WESTWOOD BROOK STW (SSTO) EA ID / permit SVT02528 · T/41/45991/R Outlet location SK4202359620 (OS grid reference) · View on Apple Maps WFD catchment Westwood Brook Catchment (trib of Alfreton Brook) (GB104028052360) 2024 spills / hours 120 / 1,391 Long-term average 111.8 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 Operational improvement completed Volume & pollution Estimate from 529 hours spilling →	Morton Brook	61	529	down 49%	100%
Beckford Sewage Treatment Works Storm tank at sewage works Sewage works Beckford Company site name BECKFORD STW (CSO) EA ID / permit SVT00221 · S/17/25751/R Outlet location SO9710935246 (OS grid reference) · View on Apple Maps WFD catchment Carrant Bk - source to conf R Avon (GB109054039851) 2024 spills / hours 61 / 510 Long-term average 61.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement UWWTR improvement ongoing, Operational improvement completed Volume & pollution Estimate from 521 hours spilling →	Carrant Brook&Trib of Carrant	37	521	down 39%	96%
Strongford Sewage Treatment Works Storm tank at sewage works Sewage works Strongford Company site name STRONGFORD STW (SSTO) EA ID / permit SVT02239 · T/01/36052/R Outlet location SJ8767039229 (OS grid reference) · View on Apple Maps WFD catchment Trent from Fowlea Brook to Tittensor (GB104028053271) 2024 spills / hours 84 / 821 Long-term average 73.8 spills a year (monitored since 2020) 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 521 hours spilling →	Yockerton Brook	57	521	down 32%	100%
Cromford - Derby Rd (Bus Shelter) (CSO) Overflow on sewer network EA ID / permit SVT02705 · Unpermitted Outlet location SK2956357058 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Wye to Amber (GB104028052390) 2024 spills / hours – / – High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Telemetry or data archiving failure / issue · Resolved - May Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 514 hours spilling →	River Derwent	46	514		65%
Earlswood (Wood End) Sewage PS Storm discharge at pumping station Company site name TAMWORTH IN ARDEN - WOOD END LANE (CSO) EA ID / permit SVT00817 · T/11/35906/O Outlet location SP1058072080 (OS grid reference) · View on Apple Maps WFD catchment Blythe from Source to Cuttle Brook (GB104028042400) 2024 spills / hours 83 / 1,326 Long-term average 59.5 spills a year (monitored since 2024) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 510 hours spilling →	Spring Brook	36	510	down 57%	100%
Colwall CSO Overflow on sewer network Company site name COLWALL - PARK FARM PS (CSO) EA ID / permit SVT00620 · S/09/20392/O Outlet location SO7384542555 (OS grid reference) · View on Apple Maps WFD catchment Cradley Bk - source to conf Suckley Bk (GB109054039910) 2024 spills / hours 81 / 641 Long-term average 64.1 spills a year (monitored since 2019) 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 507 hours spilling →	Tributary of Cradley Brook	50	507	down 38%	100%
Pontesbury Sewage Treatment Works Storm tank at sewage works Sewage works Pontesbury Company site name PONTESBURY (STW) EA ID / permit SVT01809 · S/02/56261/R Outlet location SJ3999106576 (OS grid reference) · View on Apple Maps WFD catchment Rea Bk - conf Minsterley Bk to conf Pontesford Bk (GB109054049570) 2024 spills / hours 101 / 976 Long-term average 71.6 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 503 hours spilling →	Tributary of Rea Brook	53	503	down 48%	100%
Coventry-Finham WwTW Storm tank at sewage works Sewage works Coventry Finham Company site name FINHAM - SSTO OVERFLOW-3PG-FINHAM BROOK EA ID / permit SVT02690 · S/11/26637/R Outlet location SP3325474303 (OS grid reference) · View on Apple Maps WFD catchment Finham Bk - conf Canley Bk to conf R Sowe (GB109054044480) 2024 spills / hours 81 / 1,363 Long-term average 59.0 spills a year (monitored since 2024) High-spill reason (company) Performance - Asset configuration (e.g. PS/rising main/storm tanks) Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 487 hours spilling →	Finham Brook	37	487	down 54%	100%
Oldcroft - Old Dam Road SPS Storm discharge at pumping station Company site name OLDCROFT - OLD DAM ROAD (CSO) EA ID / permit SVT01722 · S/20/25519/O Outlet location SO6468905855 (OS grid reference) · View on Apple Maps WFD catchment Cannop Bk - source to R Severn Estuary (GB109054032640) 2024 spills / hours 41 / 635 Long-term average 30.4 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 481 hours spilling →	Plummers Brook	30	481	down 27%	100%
Blockley Sewage Treatment Works Storm tank at sewage works Sewage works Blockley Company site name BLOCKLEY (STW) EA ID / permit SVT00297 · S/14/25492/R Outlet location SP1817936324 (OS grid reference) · View on Apple Maps WFD catchment Blockley Bk - source to conf Knee Bk (GB109054039830) 2024 spills / hours 106 / 2,034 Long-term average 116.6 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 480 hours spilling →	Blockley Brook	32	480	down 70%	100%

Sewage treatment works

Storm tanks and inlet overflows at each Severn Trent 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.