Official records compared

Permitted overflows not found on the hub

The Environment Agency's public register lists every permit held by a water company to discharge storm sewage in England. The National Storm Overflow Hub lists the overflows the companies report on. We compare the two.

Active storm sewage permits

10,935

No hub overflow within 500 m

1,297

11.9%

What this does and does not show

The data shows a permitted storm sewage discharge point on the EA register with no overflow published on the hub within 500 m. It does not show that an overflow is unmonitored or that anything is wrong. Common reasons for a gap:

the permit's grid reference is approximate or marks the works, not the outfall;
one permit covers an overflow the hub lists under a different location;
the overflow is not published on the hub.

35 active permits have no usable grid reference on the register and are left out. Each row links to the EA register so it can be checked. England only: Welsh permits are held by Natural Resources Wales. Company names are as recorded on the register. Register last read 2026-09-20.

By company

Permit holder	Permits	Within 100 m	100 to 500 m	Over 500 m
Severn Trent Water Limited	1,989	977	626	386
Wessex Water Services Limited	874	442	262	170
Northumbrian Water Limited	1,330	817	373	140
United Utilities Water Limited	2,083	1,834	119	130
Yorkshire Water Services Limited	1,697	1,367	215	115
Southern Water Services Limited	708	470	124	114
Anglian Water Services Limited	995	683	208	104
South West Water Limited	904	544	265	95
Thames Water Utilities Limited	254	170	56	28
Dŵr Cymru Cyfyngedig	95	61	22	12
Ancala Water Services (Estates) Limited	3	0	1	2
Yorkshire Water Services Limited\|Northumbrian Water Limited	1	0	0	1
Severn Trent Water Limited\|Environmental Permits Severn Trent Water	1	1	0	0
Severn Trent Water Limited\|Yorkshire Water Services Limited	1	0	1	0

Wessex Water Services Limited: 170 permits with no hub overflow within 500 m

Site (register name)	Area	Grid ref	Nearest hub overflow	Permit
BURROWBRIDGE STW	Somerset	ST3580030360	3.4 km	SW/070299/001
HOME FARM SEWAGE PUMPING STATION	Wiltshire	SU1770026950	2.4 km	SW/041885/001
WELLSWAY COMBINED SEWER OVERFLOW	Bath and North East Somerset	ST7417262455	2.1 km	SW/NPSWQD008606/002
RUSH HILL	Bath and North East Somerset	ST7333062610	2.1 km	SW/101930/001
ASHLEY ROAD COMBINED SEWER OVERFLOW	Bournemouth, Christchurch and Poole	SZ1116592631	2.1 km	SW/042745/003
RUSH HILL CSO	Bath and North East Somerset	ST7288062870	1.9 km	SW/101925/002
WHITE WAY ROAD CSO	Bath and North East Somerset	ST7266363029	1.7 km	SW/101926/003
TRAFALGAR ROAD CSO	Bath and North East Somerset	ST7296066530	1.7 km	SW/012182/003
MOUNT ROAD CSO	Bath and North East Somerset	ST7271263058	1.7 km	SW/101927/003
BLACK ROCKS CSO	North Somerset	ST3212059220	1.6 km	SW/101579/004
LANSDOWN LANE COMBINED SEWER O'FLOW	Bath and North East Somerset	ST7257566633	1.6 km	SW/012179/003
SOUTHLANDS COMBINED SEWER OVERFLOW	Bath and North East Somerset	ST7273166472	1.6 km	SW/012181/002
ENGLISHCOMBE LANE CSO	Bath and North East Somerset	ST7299063220	1.5 km	SW/101929/002
IRVING CLOSE CSO	South Gloucestershire	ST6505075649	1.5 km	SW/103074/003
STORAGE TANK OVERFLOW	South Gloucestershire	ST6497174359	1.4 km	SW/100891/002
REAR OF 34 WELLSWAY	Bath and North East Somerset	ST7456063080	1.4 km	SW/101924/001
ENGLISHCOMBE LANE CSO	Bath and North East Somerset	ST7343663361	1.4 km	SW/102605/002
84 NEW CHELTENHAM ROAD CSO	South Gloucestershire	ST6496074300	1.3 km	SW/100896/004
43 NEW CHELTENHAM ROAD CSO	South Gloucestershire	ST6488674365	1.3 km	SW/100895/005
ORCHARD ROAD CSO	South Gloucestershire	ST6530073530	1.3 km	SW/101760/002
FOX HILL WOODLANDS COTTAGE CSO	Bath and North East Somerset	ST7532262973	1.3 km	SW/010936/005
WICKHOUSE FARM CSO	Bath and North East Somerset	ST6764167467	1.3 km	SW/102129/003
LUCKLANDS ROAD COMBINED SEWER OF	Bath and North East Somerset	ST7314066240	1.3 km	SW/012180/002
ADMIRAL HARDY CSO	Dorset	SY6643078880	1.2 km	SW/400903/003
CSO O/S 23/25 NEW CHELTENHAM ROAD	South Gloucestershire	ST6479074320	1.2 km	SW/100894/003
ALMA ROAD CSO	Bristol, City of	ST5775074010	1.2 km	SW/102253/003
ST GEORGE'S PARK 2 CSO	Bristol, City of	ST6198073630	1.2 km	SW/102884/002
KINGSHOLME ROAD CSO	South Gloucestershire	ST6480074288	1.2 km	SW/100890/004
SOUTHDOWN ROAD CSO	Bath and North East Somerset	ST7289063550	1.2 km	SW/101928/002
ST GEORGES PARK 1 CSO	North Somerset	ST6174973664	1.2 km	SW/102883/003
WHITEHALL ROAD CSO	Bristol, City of	ST6109173779	1.2 km	SW/103016/002
20 NEW CHELTENHAM ROAD CSO	South Gloucestershire	ST6473374257	1.2 km	SW/100893/003
57 LYPPIATT ROAD CSO	Bristol, City of	ST6158073690	1.1 km	SW/102880/004
COTHAM HILL CSO	Bristol, City of	ST5784174089	1.1 km	SW/102255/002
BEECHWOOD AVENUE CSO	South Gloucestershire	ST6460972380	1.1 km	SW/101753/003
COOPER DEAN COMBINED SEWER OVERFLOW	Bournemouth, Christchurch and Poole	SZ1204394063	1.1 km	SW/041221/004
ENTRY HILL GARDENS CSO	Bath and North East Somerset	ST7471063260	1.1 km	SW/NPSWQD002414/001
48 DOWNEND ROAD CSO	South Gloucestershire	ST6465074250	1.1 km	SW/100892/006
CLIFTON DOWN STATION	Bristol, City of	ST5770074150	1.1 km	SW/102254/001
CENTRAL AVENUE COMBINED SEWER OF	South Gloucestershire	ST6452671983	1.1 km	SW/101754/002
DONIFORD PUMPING STATION	Somerset	ST0893942934	1.1 km	SW/101941/002
24 TO 39 HAZEL GROVE	Bath and North East Somerset	ST7358063610	1.1 km	SW/102603/002
29 LYPPIATT ROAD CSO	Bristol, City of	ST6159773634	1.1 km	SW/102879/003
CSO ADJACENT TO 22-23 HAZEL GROVE	Bath and North East Somerset	ST7357063640	1.1 km	SW/102602/001
COLLEGE STREET CSO	Wiltshire	SU1485930438	1.1 km	SW/041303/003
BRAINSFIELD	Bristol, City of	ST5685076490	1.1 km	SW/011042/001
37 ENDLESS STREET CSO	Wiltshire	SU1447930240	1.1 km	SW/043196/002
LOWER HIGH STREET CSO	Bristol, City of	ST5282077330	1.0 km	SW/102066/003
AVONMOUTH WAY COMBINED SEWER OF	Bristol, City of	ST5264978387	1.0 km	SW/102068/002
GREEN SPOT CSO	Somerset	SS9744046390	1.0 km	SW/101775/002
HIGH STREET SSO	Wiltshire	SU1430029940	1.0 km	SW/043197/003
BLOOMFIELD ROAD CSO	Bath and North East Somerset	ST7453263508	1.0 km	SW/102778/002
170 NEW CHELTENHAM ROAD CSO	South Gloucestershire	ST6531374350	1.0 km	SW/100889/004
HISCOCKS DRIVE CSO	Bath and North East Somerset	ST7407363745	1.0 km	SW/010941/003
GLOUCESTER ROAD CSO	Bristol, City of	ST5918075831	0.9 km	SW/013053/002
LAWRENCE GROVE CSO	Bristol, City of	ST5778476440	0.9 km	SW/100476/004
42 ORCHARD VALE CSO	South Gloucestershire	ST6598073490	0.9 km	SW/101762/002
HAMPTON ROAD CSO	Bristol, City of	ST5793174279	0.9 km	SW/102256/002
LONGCROFT ROAD CSO	Dorset	SY6683079300	0.9 km	SW/400902/002
HANHAM HIGH STREET CSO	South Gloucestershire	ST6410972409	0.9 km	SW/101758/003
ALMA ROAD COMBINED SEWER OVERFLOW	South Gloucestershire	ST6537374306	0.9 km	SW/100897/005
NEATH ROAD COMBINED SEWER OVERFLOW	Bristol, City of	ST6165573925	0.9 km	SW/101799/002
HOLMES HILL ROAD COMBINED SEWER	Bristol, City of	ST6267373744	0.9 km	SW/102878/003
WELLS ROAD / GREENMORE ROAD CSO	Bristol, City of	ST6066070830	0.9 km	SW/013223/005
OLD PARK RD COMBINED SEWER OVERFLOW	Bristol, City of	ST5264577231	0.9 km	SW/102090/002
223 HAYCOMBE DRIVE	Bath and North East Somerset	ST7244663982	0.9 km	SW/NPSWQD008608/003
BUDE AVENUE FOOTBALL PITCH CSO	Bristol, City of	ST6324073560	0.9 km	SW/102877/002
LOWER HIGH STREET CSO	Bristol, City of	ST5265177601	0.9 km	SW/102073/002
CHARLTON ROAD CSO	Bath and North East Somerset	ST6449168111	0.9 km	SW/102127/002
WINDMILL HILL COMBINED SEWER OF	Somerset	ST3185325119	0.9 km	SW/102264/002
AVONMOUTH ROAD CSO	Bristol, City of	ST5265277597	0.9 km	SW/102091/002
WHITEWAY ROAD COMBINED SEWER OF	Bristol, City of	ST6309473909	0.9 km	SW/101798/002
LOWER HANHAM ROAD CSO	South Gloucestershire	ST6420272495	0.9 km	SW/101759/003
UPTON FRENCH'S FARM PUMPING STATION	Dorset	SY9685093152	0.9 km	SW/EPRJB3793WZ/002
BISHOPS ROAD CSO	Bristol, City of	ST5912875741	0.8 km	SW/013056/002
THIRD WAY CSO	Bristol, City of	ST5233878677	0.8 km	SW/102070/002
MIDFORD PUMPING STATION	Bath and North East Somerset	ST7600060000	0.8 km	SW/021434/002
OLDFIELD LANE CSO	Bath and North East Somerset	ST7400963855	0.8 km	SW/010940/004
THE MARSH COMBINED SEWER OVERFLOW	Dorset	SY6680078990	0.8 km	SW/400904/002
VICTORIA ROAD CSO	Dorset	SY6888390291	0.8 km	SW/EPRAP3920GG/002
HANGING LANGFORD PUMPING STATION	Wiltshire	SU0368236986	0.8 km	SW/NPSWQD003662/002
FORTFIELD RD CSO	Bristol, City of	ST6051368234	0.8 km	SW/102979/002
WEST ROAD FOUNDRY PUMPING STATION	Dorset	SY4547793102	0.8 km	SW/402031/002
WELLS ROAD / MARSTON ROAD CSO	Bristol, City of	ST6060070920	0.8 km	SW/013219/003
WOOD ROAD COMBINED SEWER OVERFLOW	South Gloucestershire	ST6482073450	0.8 km	SW/101751/003
LYMORE GARDENS CSO	Bath and North East Somerset	ST7333064050	0.8 km	SW/101931/002
HENLEAZE ROAD CSO	Bristol, City of	ST5777576613	0.8 km	SW/100477/005
HOLDENHURST ROAD CSO	Bristol, City of	ST6416574107	0.8 km	SW/102881/002
WELLSWAY COMBINED SEWER OVERFLOW	Bath and North East Somerset	ST7461063700	0.8 km	SW/103900/001
MAXSE ROAD CSO	Bristol, City of	ST6068070970	0.8 km	SW/013224/004
NUNNEY CASTLE CSO	Somerset	ST7365545700	0.8 km	SW/102501/002
HENGISTBURY HEAD PUMPING STATION	Bournemouth, Christchurch and Poole	SZ1564091350	0.8 km	SW/400550/002
NEW QUEEN STREET COMBINED SEWER OF	Bristol, City of	ST6388374092	0.8 km	SW/101795/002
82 CHARLTON ROAD COMBINED SEWER	Bristol, City of	ST6391474096	0.8 km	SW/103308/003
LYNCOMBE VALE CSO	Bath and North East Somerset	ST7549363538	0.8 km	SW/010935/004
WELLS ROAD / PRIORY ROAD CSO	Bristol, City of	ST6074070710	0.8 km	SW/013220/005
HILL STREET COMBINED SEWER OVERFLOW	South Gloucestershire	ST6619073640	0.7 km	SW/101749/002
ANSTEY'S RD CSO	South Gloucestershire	ST6397072340	0.7 km	SW/103355/001
39 SPEEDWELL ROAD CSO	Bristol, City of	ST6256074260	0.7 km	SW/102882/002
WATLING WAY COMBINED SEWER OVERFLOW	Bristol, City of	ST5263677403	0.7 km	SW/102071/002
BEDMINSTER ROAD CSO	Bristol, City of	ST5771070470	0.7 km	SW/103305/002
HENHAYES FIELD CSO	Somerset	ST4437009740	0.7 km	SW/101657/001
FOSSE LANE PS	Somerset	ST6288542696	0.7 km	SW/103573/003
POLLY BARNES HILL CSO	South Gloucestershire	ST6381072430	0.7 km	SW/101750/002
BECKHAMPTON ROAD CSO	Bath and North East Somerset	ST7381063960	0.7 km	SW/102606/002
CAIRNS ROAD COMBINED SEWER OVERFLOW	Bristol, City of	ST5809975911	0.7 km	SW/NPSWQD010511/003
BLENHEIM ROAD CSO	Somerset	SS9717046640	0.7 km	SW/101774/002
STOKE LANE COMBINED SEWER OVERFLOW	Bristol, City of	ST5676776843	0.7 km	SW/013106/003
HENLEAZE PARK DRIVE CSO	Bristol, City of	ST5789876679	0.7 km	SW/100458/002
QUEEN SQUARE CSO	Somerset	ST3189525295	0.7 km	SW/070910/004
WELLSWAY	Bath and North East Somerset	ST7460063790	0.7 km	SW/101922/001
SEMINGTON ROAD CSO	Wiltshire	ST9034063050	0.7 km	SW/102323/001
GROVE ROAD CSO	Bristol, City of	ST6281075520	0.7 km	SW/101277/001
DARTMOUTH AVENUE CSO	Bath and North East Somerset	ST7334064255	0.7 km	SW/NPSWQD010267/002
BLOOMFIELD RD JUNCTION CSO	Bath and North East Somerset	ST7458663803	0.7 km	SW/101923/002
HENLEAZE ROAD CSO	Bristol, City of	ST5781076720	0.7 km	SW/100459/002
MARION WALK CSO	Bristol, City of	ST6337073270	0.7 km	SW/103312/002
MYRTLE STREET CSO	Bristol, City of	ST5783071470	0.7 km	SW/103306/002
WESTBURY ROAD COMBINED SEWER OF	Bristol, City of	ST5725576794	0.7 km	SW/013105/003
WESTBURY ROAD COMBINED SEWER OF	Bristol, City of	ST5725576794	0.7 km	SW/013108/003
FILTON AVENUE CSO	South Gloucestershire	ST6082978675	0.7 km	SW/010988/005
BROOK ROAD CSO	Bristol, City of	ST6251574330	0.7 km	SW/101790/002
SPEEDWELL ROAD COMBINED SEWER OF	Bristol, City of	ST6277074275	0.7 km	SW/101797/002
LYNCOMBE VALE CSO	Bath and North East Somerset	ST7572063740	0.7 km	SW/NPSWQD002499/003
HILLBURN ROAD CSO	Bristol, City of	ST6340573509	0.7 km	SW/101794/002
MONTACUTE HOUSE DRIVE	Somerset	ST4983017230	0.6 km	SW/071710/001
1 HOWARD ROAD CSO	Bristol, City of	ST5770075822	0.6 km	SW/NPSWQD010513/004
BOURNEMOUTH NO 1 PUMPING STATION	Bournemouth, Christchurch and Poole	SZ0883090760	0.6 km	SW/400758/002
THE HAMS PUMPING STATION	Bath and North East Somerset	ST6525069190	0.6 km	SW/013093/002
FOREST ROAD CSO	Bristol, City of	ST6375275575	0.6 km	SW/101276/003
BISHOPTHORPE ROAD CSO	Bristol, City of	ST5873977094	0.6 km	SW/100464/004
STATION ROAD CSO	Bristol, City of	ST5898074570	0.6 km	SW/100877/004
MINA ROAD SEWER STORM OVERFLOW	Bristol, City of	ST5999975109	0.6 km	SW/101850/002
30 STATION ROAD CSO	Bristol, City of	ST5320276686	0.6 km	SW/102094/002
MEADOW VALE COMBINED SEWER OVERFLOW	Bristol, City of	ST6317074160	0.6 km	SW/103313/002
STATION ROAD CSO	South Gloucestershire	ST6555075640	0.6 km	SW/103075/001
QUEEN STREET CSO	Bristol, City of	ST6360873757	0.6 km	SW/101796/002
EAST STREET CSO	Bristol, City of	ST5833071460	0.6 km	SW/102898/002
BROOK ROAD COMBINED SEWER OVERFLOW	Bristol, City of	ST6267074400	0.6 km	SW/101791/002
HIGH STREET/ST MARKS CSO	Bristol, City of	ST6085074350	0.6 km	SW/103310/003
MANOR HOUSE ROAD CSO	Somerset	ST4994739364	0.6 km	SW/102491/003
DEVONSHIRE ROAD CSO	Bristol, City of	ST5762675707	0.6 km	SW/NPSWQD010514/004
SOMERVILLE ROAD CSO	Bristol, City of	ST5912575315	0.6 km	SW/100875/002
FILTON AVENUE CSO	Bristol, City of	ST6009077220	0.6 km	SW/101730/003
OAKLEY ROAD CSO	Bristol, City of	ST6001077140	0.6 km	SW/101851/001
BATH ROAD (NO 2) CSO	Bristol, City of	ST6240370271	0.6 km	SW/100581/CS/01/002
BATH ROAD (NO 2) CSO	Bristol, City of	ST6240370271	0.6 km	SW/100582/CS/01/002
QUEENS HEAD COMBINED SEWER OVERFLOW	Bristol, City of	ST5701568177	0.6 km	SW/101824/003
COTHAM BROW CSO	Bristol, City of	ST5885074570	0.6 km	SW/100873/004
CSO AT TOP OF SOUTH WALKS	Dorset	SY6919790339	0.6 km	SW/400688/004
CHICKERELL BOYS CLUB CSO	Dorset	SY6704078620	0.6 km	SW/400897/002
NEW ROAD COMBINED SEWER OVERFLOW	South Gloucestershire	ST6186379679	0.6 km	SW/101681/003
STALBRIDGE PUMPING STATION	Dorset	ST7425017720	0.5 km	SW/050979/003
FOOTSHILL ROAD CSO	South Gloucestershire	ST6433872891	0.5 km	SW/101757/002
GOLDCROFT COMBINED SEWER OVERFLOW	Somerset	ST5593016255	0.5 km	SW/071700/005
OUTSIDE 395 WELLS ROAD	Bristol, City of	ST6082070500	0.5 km	SW/013221/003
SEMINGTON ROUNDABOUT	Wiltshire	ST9030062900	0.5 km	SW/100632/001
TUGELA ROAD CSO	Bristol, City of	ST5676069250	0.5 km	SW/101825/002
OAKWOOD ROAD CSO	Bristol, City of	ST5795076833	0.5 km	SW/100475/002
11 NEWCOMBE ROAD CSO	Bristol, City of	ST5669077014	0.5 km	SW/013102/003
STATION MILLS CSO	Somerset	ST1333021220	0.5 km	SW/013463/003
14 DOWNLEAZE ROAD CSO	South Gloucestershire	ST6495077890	0.5 km	SW/101643/003
GORDON ROAD COMBINED SEWER OVERFLOW	Bristol, City of	ST6179074320	0.5 km	SW/102144/002
WOOLLEY STREET CSO	Wiltshire	ST8319061147	0.5 km	SW/101645/002
BURCHELLS GREEN ROAD CSO	Bristol, City of	ST6364074280	0.5 km	SW/101247/003
OAKDALE ROAD CSO	South Gloucestershire	ST6499077900	0.5 km	SW/101434/005
ASHLEY DOWN ROAD ALLOTMENTS CSO	Bristol, City of	ST5979874930	0.5 km	SW/EPRAP3921GT/002
224 HENLEAZE ROAD CSO	Bristol, City of	ST5787176873	0.5 km	SW/100479/002
201 GLOUCESTER ROAD CSO	Bristol, City of	ST5905175317	0.5 km	SW/013054/003
PRIOR PARK ROAD CSO	Bath and North East Somerset	ST7569063901	0.5 km	SW/NPSWQD002498/003

Sources: Environment Agency public register, Discharges to Water and Groundwater (Environment Agency Conditional Licence); National Storm Overflow Hub. The register is read weekly and every download is archived with a SHA-256 fingerprint (see how we keep the record).