Storm overflow register · 2025 annual return

Wessex Water storm overflows, 2025

Wessex Water reported 1,346 storm overflows in England for 2025. Together they recorded 24,442 spills over 190,666 hours, an average of 18.2 spills per overflow against 20.4 across England. That ranks 6 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 45% on 2024.

220 overflows did not spill · 62 spilled more than 60 times · 1,308 had monitors working for 90% of the year or more · 242 sewage treatment works with overflows

Hours spilling by month, 2025

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

All Wessex 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
Brinkworth WwTW Storm tank at sewage works Sewage works Brinkworth Company site name BRINKWORTH STORM TANK EA ID / permit WXW00182 · 012129 Outlet location SU0106383979 (OS grid reference) · View on Apple Maps WFD catchment Brinkworth Brook (GB109053027740) 2024 spills / hours 60 / 645 Long-term average 48.9 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 265 hours spilling →	Brinkworth Brook (S)	25	265	down 58%	100%
Wootton Bassett WwTW Storm tank at sewage works Sewage works Wootton Bassett Company site name ROYAL WOOTTON BASSETT STORM TANK EA ID / permit WXW01285 · 100673 Outlet location SU0740681472 (OS grid reference) · View on Apple Maps WFD catchment Brinkworth Brook (GB109053027740) 2024 spills / hours 42 / 501 Long-term average 31.3 spills a year (monitored since 2018) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 265 hours spilling →	Hancock'S Water	24	265	down 43%	100%
Barton St David Pumping Station Storm discharge at pumping station Company site name BARTON ST DAVID EA ID / permit WXW00107 · EPRCB3399AC Outlet location ST5400333303 (OS grid reference) · View on Apple Maps WFD catchment Brue - Tootle Bridge to Clyse Hole (GB108052021182) 2024 spills / hours 45 / 397 Long-term average 25.7 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 265 hours spilling →	Tributary of Barton Brook	31	265	down 31%	100%
Milborne Port STW Storm tank at sewage works Sewage works Milborne Port Company site name MILBORNE PORT VENN FARM STORM TANK EA ID / permit WXW00723 · 102195 Outlet location ST6836017440 (OS grid reference) · View on Apple Maps WFD catchment Yeo (GB108052015630) 2024 spills / hours 43 / 594 Long-term average 29.8 spills a year (monitored since 2021) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 264 hours spilling →	Henover Brook(S)	22	264	down 49%	100%
Plimsoll Statue CSO Overflow on sewer network Company site name BRISTOL PORTWAY NEAR PLIMSOLL BRIDGE (PUMPED) EA ID / permit WXW00862 · 102901 Outlet location ST5664272585 (OS grid reference) · View on Apple Maps WFD catchment Not part of a river WB catchment 2024 spills / hours 45 / 293 Long-term average 47.5 spills a year (monitored since 2018) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 260 hours spilling →	River Avon (Estuarine)	37	260	down 18%	100%
King'S Stag WwTW Inlet overflow at sewage works Sewage works King S Stag Company site name KINGS STAG STORM TANK EA ID / permit WXW00597 · 040047 Outlet location ST7267810766 (OS grid reference) · View on Apple Maps WFD catchment Lydden (Middle) (GB108043015940) 2024 spills / hours 39 / 384 Long-term average 30.8 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 259 hours spilling →	River Lydden	28	259	down 28%	100%
Mill Lodge CSO Overflow on sewer network Company site name TOCKINGTON MILL LODGE EA ID / permit WXW00738 · 101957 Outlet location ST6050386197 (OS grid reference) · View on Apple Maps WFD catchment Chestle Pill (GB109054026650) 2024 spills / hours 35 / 449 Long-term average 31.7 spills a year (monitored since 2023) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 259 hours spilling →	Tockington Mill Rhine	14	259	down 60%	100%
Calne Wastewater Treatment Works Storm tank at sewage works Sewage works Calne Company site name CALNE STORM TANK EA ID / permit WXW00223 · 103731 Outlet location ST9778071530 (OS grid reference) · View on Apple Maps WFD catchment Marden - source to conf Cowage Bk (GB109053022050) 2024 spills / hours 72 / 1,005 Long-term average 42.5 spills a year (monitored since 2018) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 256 hours spilling →	River Marden(S)	26	256	down 64%	100%
Keynsham Wastewater Treatment Works Storm tank at sewage works Sewage works Keynsham Company site name KEYNSHAM STORM TANK EA ID / permit WXW00591 · 102362 Outlet location ST6610068910 (OS grid reference) · View on Apple Maps WFD catchment Bristol Avon (By Bk to Netham Weir) (GB109053027371) 2024 spills / hours 75 / 969 Long-term average 67.6 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 256 hours spilling →	River Avon	27	256	down 64%	100%
Kingsbury Episcopi Pumping Station Storm discharge at pumping station Company site name KINGSBURY EPISCOPI EA ID / permit WXW00598 · 013464 Outlet location ST4305021150 (OS grid reference) · View on Apple Maps WFD catchment Westmoor Main Drain (GB108052015230) 2024 spills / hours 29 / 343 Long-term average 16.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 255 hours spilling →	Tributary of River Parrett (S)	23	255	down 21%	100%
Sampford Brett CSO Overflow on sewer network Company site name SAMPFORD BRETT SAMPFORD BRETT SO EA ID / permit WXW00954 · 102304 Outlet location ST0903340211 (OS grid reference) · View on Apple Maps WFD catchment Doniford Stream (GB108051020250) 2024 spills / hours 47 / 342 Long-term average 29.4 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 254 hours spilling →	Doniford Stream	28	254	down 40%	100%
The Star Pumping Station Storm discharge at pumping station Company site name HOLT THE STAR EA ID / permit WXW01127 · 101024 Outlet location ST8654561542 (OS grid reference) · View on Apple Maps WFD catchment Bristol Avon (Semington Bk to By Bk) (GB109053027372) 2024 spills / hours 82 / 596 Long-term average 65.3 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation UWWTR investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 254 hours spilling →	Tributary of the River Avon	48	254	down 41%	100%
Wincanton Water Recycling Centre Storm tank at sewage works Sewage works Wincanton Company site name WINCANTON STORM TANK EA ID / permit WXW01265 · 401609 Outlet location ST7106027380 (OS grid reference) · View on Apple Maps WFD catchment Cale (GB108043015850) 2024 spills / hours 62 / 487 Long-term average 50.8 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement Operational improvement completed Volume & pollution Estimate from 251 hours spilling →	River Cale	32	251	down 48%	100%
Manor Cottages Pumping Station Storm discharge at pumping station Company site name BIDDESTONE MANOR COTTAGES EA ID / permit WXW00679 · 102548 Outlet location ST8670073060 (OS grid reference) · View on Apple Maps WFD catchment Pudding Bk - source to conf R Avon (Brist) (GB109053027410) 2024 spills / hours 99 / 774 Long-term average 72.5 spills a year (monitored since 2019) 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 251 hours spilling →	Trib of Pudding Brook (S)	40	251	down 60%	100%
Noah'S Ark Pumping Station Storm discharge at pumping station Company site name MALMESBURY NOAHS ARK EA ID / permit WXW00799 · 101696 Outlet location ST9595088570 (OS grid reference) · View on Apple Maps WFD catchment Charlton Str - source to conf Bristol Avon (GB109053027770) 2024 spills / hours 49 / 746 Long-term average 19.9 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 250 hours spilling →	Trib River Avon (S)	19	250	down 61%	100%
Keinton Mandeville PS Storm discharge at pumping station Company site name KEINTON MANDEVILLE EA ID / permit WXW00586 · 103181 Outlet location ST5489029692 (OS grid reference) · View on Apple Maps WFD catchment Cary - source to conf with KSD (GB108052015140) 2024 spills / hours 20 / 104 Long-term average 20.2 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 249 hours spilling →	Trib of River Carey(via Drain)	23	249	up 15%	100%
North Petherton WRC Storm tank at sewage works Sewage works North Petherton Company site name NORTH PETHERTON STORM TANK EA ID / permit WXW00807 · 101640 Outlet location ST3005932637 (OS grid reference) · View on Apple Maps WFD catchment Petherton Stream (GB108052021360) 2024 spills / hours 80 / 870 Long-term average 53.8 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement Operational improvement completed Volume & pollution Estimate from 246 hours spilling →	Petherton Stream	19	246	down 76%	100%
North Perrott CSO Overflow on sewer network Company site name NORTH PERROTT OLD STW SITE EA ID / permit WXW00806 · 102403 Outlet location ST4764810196 (OS grid reference) · View on Apple Maps WFD catchment Broad (GB108052015270) 2024 spills / hours 53 / 251 Long-term average 40.1 spills a year (monitored since 2018) 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 245 hours spilling →	Trib of Small Brook	37	245	down 30%	100%
Hockholler Pumping Station Storm discharge at pumping station Company site name BRADFORD ON TONE HOCKHOLLER A38 EA ID / permit WXW00550 · 070798 Outlet location ST1652721443 (OS grid reference) · View on Apple Maps WFD catchment Haywards Water (GB108052015390) 2024 spills / hours 102 / 338 Long-term average 95.8 spills a year (monitored since 2018) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 244 hours spilling →	Tributary of River Tone	63	244	down 38%	99%
Chilcompton WwTW Inlet overflow at sewage works Sewage works Chilcompton Company site name CHILCOMPTON INLET EA ID / permit WXW00270 · 102218 Outlet location ST6512752900 (OS grid reference) · View on Apple Maps WFD catchment Somer (GB109053022251) 2024 spills / hours 93 / 387 Long-term average 82.4 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 242 hours spilling →	Somer Stream(S)	85	242	down 9%	100%
Hanging Langford Pumping Station Storm discharge at pumping station (with treatment) Company site name HANGING LANGFORD EA ID / permit WXW00498 · NPSWQD003662 Outlet location SU0449037130 (OS grid reference) · View on Apple Maps WFD catchment Wylye (Middle) (GB108043022550) Treatment Reed bed 2024 spills / hours 191 / 827 Long-term average 219.3 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 242 hours spilling →	River Wylye via A Reed Bed	84	242	down 56%	100%
Lower Tockington Road Combined Overflow on sewer network Company site name TOCKINGTON LOWER TOCKINGTON ROAD ADJ TO IVYWELL EA ID / permit WXW00657 · 101835 Outlet location ST6087886240 (OS grid reference) · View on Apple Maps WFD catchment Chestle Pill (GB109054026650) 2024 spills / hours 55 / 657 Long-term average 40.7 spills a year (monitored since 2023) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 238 hours spilling →	Tockington Mill Rhyne	25	238	down 55%	100%
Warminster WwTW Storm tank at sewage works Sewage works Warminster Company site name WARMINSTER STORM TANK EA ID / permit WXW01192 · 402466 Outlet location ST8742043670 (OS grid reference) · View on Apple Maps WFD catchment Wylye (Headwaters) (GB108043022520) 2024 spills / hours 33 / 382 Long-term average 19.9 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement Operational improvement completed Volume & pollution Estimate from 238 hours spilling →	River Wylye	18	238	down 45%	100%
Townsend PS Storm discharge at pumping station Company site name POULSHOT TOWNSEND EA ID / permit WXW01149 · 102478 Outlet location ST9609058770 (OS grid reference) · View on Apple Maps WFD catchment Poulshot Str - source to conf Summerham Bk (GB109053022190) 2024 spills / hours 58 / 712 Long-term average 29.5 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 238 hours spilling →	Trib of Summerham Brook(S)	19	238	down 67%	100%
Temple Bridge Pumping Station Storm discharge at pumping station Company site name TEMPLE CLOUD BRIDGE EA ID / permit WXW01107 · 021357 Outlet location ST6255857351 (OS grid reference) · View on Apple Maps WFD catchment Cam Bk - source to conf Wellow Bk (GB109053022290) 2024 spills / hours 47 / 339 Long-term average 40.5 spills a year (monitored since 2018) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement Operational improvement completed Volume & pollution Estimate from 237 hours spilling →	Cam Brook	45	237	down 4%	99%
Mere Water Recycling Centre Storm tank at sewage works Sewage works Mere Company site name MERE ROOK STREET STORM TANK EA ID / permit WXW00713 · 040059 Outlet location ST8127331578 (OS grid reference) · View on Apple Maps WFD catchment Shreen Water (including Ashfield Water) (GB108043022450) 2024 spills / hours 95 / 959 Long-term average 41.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 235 hours spilling →	Shreen Water	26	235	down 73%	100%
Frost Lane Pumping Station Storm discharge at pumping station Company site name ILTON FROST LANE EA ID / permit WXW00455 · 070693 Outlet location ST3557017330 (OS grid reference) · View on Apple Maps WFD catchment Ding (GB108052015180) 2024 spills / hours 20 / 195 Long-term average 25.8 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 235 hours spilling →	Cad Brook	21	235	up 5%	100%
16 High Street CSO Overflow on sewer network Company site name FORDINGTON HIGH STREET NO 16 EA ID / permit WXW00009 · 400683 Outlet location SY6963090750 (OS grid reference) · View on Apple Maps WFD catchment Frome Dorset (Lower) u/s Louds Mill Dorchester (GB108044009691) 2024 spills / hours 43 / 360 Long-term average 33.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 234 hours spilling →	Dorchester Mill Stream	29	234	down 33%	100%
Wordsworth Road Attenuation Tankcso Overflow on sewer network Company site name BRISTOL WORDSWORTH ROAD ATTENUATION TANK EA ID / permit WXW01288 · EPRAP3923GZ Outlet location ST6043876774 (OS grid reference) · View on Apple Maps WFD catchment Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840) 2024 spills / hours 46 / 121 Long-term average 52.5 spills a year (monitored since 2024) 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 231 hours spilling →	Horfield Brook	59	231	up 28%	100%
Westbury Water Recycling Centre Storm tank at sewage works Sewage works Westbury Company site name WESTBURY STORM TANK EA ID / permit WXW01235 · 101652 Outlet location ST8717252598 (OS grid reference) · View on Apple Maps WFD catchment Bitham Bk - source to conf Biss Bk (GB109053021770) 2024 spills / hours 72 / 568 Long-term average 51.5 spills a year (monitored since 2022) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 228 hours spilling →	Bitham Brook/Trib Bitham Brook	21	228	down 71%	100%
Corfe Mullen Water Recycling Centre Storm tank at sewage works Sewage works Corfe Mullen Company site name CORFE MULLEN DORCHESTER ROAD STORM TANK EA ID / permit WXW00325 · 040022 Outlet location SY9899699395 (OS grid reference) · View on Apple Maps WFD catchment Stour (Middle d/s Pimperne Brook) (GB108043016052) 2024 spills / hours 55 / 506 Long-term average 42.3 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 226 hours spilling →	River Stour	30	226	down 45%	100%
Compton Dando WwTW Inlet overflow at sewage works Sewage works Compton Dando Company site name COMPTON DANDO INLET EA ID / permit WXW00319 · 010024 Outlet location ST6538364552 (OS grid reference) · View on Apple Maps WFD catchment Chew - conf Winford Bk to conf R Avon (Brist) (GB109053021950) 2024 spills / hours 113 / 1,181 Long-term average 89.5 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 226 hours spilling →	Bathford Brook (S)	44	226	down 61%	100%
Wellington WwTW Storm tank at sewage works Sewage works Wellington Company site name WELLINGTON TONE STORM TANK EA ID / permit WXW01204 · 101332 Outlet location ST1305422012 (OS grid reference) · View on Apple Maps WFD catchment Tone - Wellington to Taunton (GB108052015481) 2024 spills / hours 43 / 369 Long-term average 40.7 spills a year (monitored since 2023) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 223 hours spilling →	Tributary of River Tone	31	223	down 28%	100%
Willsbridge Combined Sewer Overflow Overflow on sewer network Company site name WILLSBRIDGE EA ID / permit WXW01260 · EPRMP3622XH Outlet location ST6608169932 (OS grid reference) · View on Apple Maps WFD catchment Bristol Avon (By Bk to Netham Weir) (GB109053027371) 2024 spills / hours 79 / 592 Long-term average 61.3 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 221 hours spilling →	River Avon	45	221	down 43%	100%
Nether Stowey Water Recycling Centr Storm tank at sewage works Sewage works Nether Stowey Water Recycling Centr Company site name NETHER STOWEY STORM TANK EA ID / permit WXW00782 · 102162 Outlet location ST2118240192 (OS grid reference) · View on Apple Maps WFD catchment Fiddington Brook (GB108052021320) 2024 spills / hours 37 / 424 Long-term average 24.3 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 220 hours spilling →	Fiddington Brook	19	220	down 49%	100%
Stoke St Gregory STW Inlet overflow at sewage works Sewage works Stoke St Gregory Company site name STOKE ST GREGORY STORM TANK EA ID / permit WXW01072 · 070379 Outlet location ST3354027530 (OS grid reference) · View on Apple Maps WFD catchment Parrett (GB540805210900) 2024 spills / hours 5 / 45 Long-term average 28.8 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 220 hours spilling →	Tidal River Tone(E)	50	220	up 900%	100%
Redwick Sewage Treatment Works Storm tank at sewage works Sewage works Redwick Company site name REDWICK STORM TANK EA ID / permit WXW00927 · 103775 Outlet location ST5469086260 (OS grid reference) · View on Apple Maps WFD catchment Chestle Pill (GB109054026650) 2024 spills / hours 40 / 539 Long-term average 27.7 spills a year (monitored since 2023) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 219 hours spilling →	The Chestle Pill River	20	219	down 50%	100%
Edford Wastewater Treatment Works Inlet overflow at sewage works Sewage works Edford Company site name EDFORD INLET EA ID / permit WXW00401 · 010034 Outlet location ST6718448659 (OS grid reference) · View on Apple Maps WFD catchment Mells source to conf with Somerset Frome (GB109053022020) 2024 spills / hours 68 / 385 Long-term average 63.7 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 219 hours spilling →	Mells River (S)	46	219	down 32%	100%
Fordingbridge WRC Storm tank at sewage works Sewage works Fordingbridge Company site name FORDINGBRIDGE FROG LANE STORM TANK EA ID / permit WXW00438 · 401342 Outlet location SU1465213085 (OS grid reference) · View on Apple Maps WFD catchment Hampshire Avon (Middle) (GB108043015841) 2024 spills / hours 61 / 213 Long-term average 47.7 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 217 hours spilling →	Hampshire Avon	21	217	down 66%	100%
Clements Lane Combined Sewer of Overflow on sewer network Company site name MERE SHAFTESBURY ROAD EA ID / permit WXW00296 · 401431 Outlet location ST8152031810 (OS grid reference) · View on Apple Maps WFD catchment Shreen Water (including Ashfield Water) (GB108043022450) 2024 spills / hours 59 / 652 Long-term average 33.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 217 hours spilling →	Shreen Water	23	217	down 61%	100%
Chard Wastewater Treatment Works Storm tank at sewage works Sewage works Chard Company site name CHARD PEASMARSH STORM TANK EA ID / permit WXW00249 · 101327 Outlet location ST3408011800 (OS grid reference) · View on Apple Maps WFD catchment Isle - Upper (GB108052015160) 2024 spills / hours 28 / 209 Long-term average 31.6 spills a year (monitored since 2021) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 215 hours spilling →	River Isle	21	215	down 25%	100%
Goose Lane Combined Sewer Overflow Overflow on sewer network Company site name CHILTON POLDEN GOOSE LANE O/S COLLINGS EA ID / permit WXW00474 · EPRJB3890RM Outlet location ST3751440212 (OS grid reference) · View on Apple Maps WFD catchment South Drain (GB108052021181) 2024 spills / hours 127 / 478 Long-term average 81.4 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement Operational improvement ongoing Volume & pollution Estimate from 214 hours spilling →	Nidon Brook	60	214	down 53%	99%
Combwich Pumping Station Other storm discharge asset type Company site name COMBWICH QUAY ROAD EA ID / permit WXW00315 · 103336 Outlet location ST2620742189 (OS grid reference) · View on Apple Maps WFD catchment PARRETT (GB540805210900) 2024 spills / hours 56 / 505 Long-term average 28.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 210 hours spilling →	River Parrett Estuary	25	210	down 55%	100%
Dowlish Wake WwTW Storm tank at sewage works Sewage works Dowlish Wake Company site name DOWLISH WAKE KINGSTON STORM TANK EA ID / permit WXW00378 · 072317 Outlet location ST3724013020 (OS grid reference) · View on Apple Maps WFD catchment Dowlish Brook (GB108052015170) 2024 spills / hours 20 / 134 Long-term average 21.6 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 207 hours spilling →	Dowlish Brook	19	207	down 5%	96%
Goosard Bridge PS Storm discharge at pumping station Company site name PAULTON GOOSARD BRIDGE EA ID / permit WXW00473 · 102216 Outlet location ST6550157716 (OS grid reference) · View on Apple Maps WFD catchment Cam Bk - source to conf Wellow Bk (GB109053022290) 2024 spills / hours 63 / 373 Long-term average 56.3 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 206 hours spilling →	Cam Brook	47	206	down 25%	100%
Chilthorne Domer STW Inlet overflow at sewage works Sewage works Chilthorne Domer Company site name CHILTHORNE DOMER OFF VAGG LANE INLET EA ID / permit WXW00274 · 070019 Outlet location ST5281019250 (OS grid reference) · View on Apple Maps WFD catchment Bearley Brook (GB108052015610) 2024 spills / hours 57 / 266 Long-term average 39.8 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 203 hours spilling →	Trib of Bearley Brook (S)	38	203	down 33%	100%
Wookey Water Recycling Centre Inlet overflow at sewage works Sewage works Wookey Company site name WOOKEY INLET EA ID / permit WXW01281 · 070130 Outlet location ST5075545603 (OS grid reference) · View on Apple Maps WFD catchment Axe - source to Cocklake (GB109052021520) 2024 spills / hours 49 / 516 Long-term average 20.4 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 201 hours spilling →	River Axe	22	201	down 55%	100%
Feltham Road CSO Overflow on sewer network Company site name PUCKLECHURCH FELTHAM ROAD EA ID / permit WXW00421 · 103912 Outlet location ST7032076470 (OS grid reference) · View on Apple Maps WFD catchment Boyd - source to conf R Avon (Brist) (GB109053027510) 2024 spills / hours 49 / 406 Long-term average 30.3 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 200 hours spilling →	Tributary of Feltham Brook	27	200	down 45%	100%
Sandmead Road Pumping Station Storm discharge at pumping station Company site name SANDFORD SANDMEAD LANE EA ID / permit WXW00961 · 103173 Outlet location ST4246160065 (OS grid reference) · View on Apple Maps WFD catchment Oldbridge R - source to nr Manor Fm (GB109052021620) 2024 spills / hours 27 / 269 Long-term average 24.3 spills a year (monitored since 2023) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 199 hours spilling →	Sandmead Rhyne	14	199	down 48%	100%
The Portway CSO Overflow on sewer network Company site name BRISTOL BLACK ROCKS PORTWAY EA ID / permit WXW01126 · 101844 Outlet location ST5612174457 (OS grid reference) · View on Apple Maps WFD catchment BRISTOL AVON (GB530905415405) 2024 spills / hours 58 / 620 Long-term average 44.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 196 hours spilling →	River Avon via SWS (Estuarine)	26	196	down 55%	100%

Sewage treatment works

Storm tanks and inlet overflows at each Wessex 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.