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

South West Water Limited: 95 permits with no hub overflow within 500 m

Site (register name)	Area	Grid ref	Nearest hub overflow	Permit
O/S 8 CALLENICK STREET CSO	Cornwall	SW8240148808	3.7 km	SW/301799/001
BEAFORD WASTE WTW	Torridge	SS5528015260	2.8 km	SW/200355/SF/01/001
BATHPOOL STW	Cornwall	SX2481074690	2.7 km	SW/302121/001
ST MARTINS LANE CSO	Mid Devon	SS8265400615	1.7 km	SW/201877/001
BULLER ROAD CSO	Mid Devon	SS8282400638	1.7 km	SW/201873/002
WESTLAKE SEPTIC TANK	South Hams	SX6232053590	1.6 km	SW/200415/001
PENNANCE MILL TIDAL TANKS CSO	Cornwall	SW7894430575	1.5 km	SW/302305/002
CENTRAL PARK CSO	Plymouth	SX4766056380	1.5 km	SW/301744/002
BEER CAR PARK PUMPING STATION	East Devon	SY2288089280	1.5 km	SW/202698/002
EXMOUTH SEWAGE TREATMENT WORKS	East Devon	SY0227080500	1.4 km	SW/201965/002
JACOBSTOWE STW EMERGENCY OVERFLOW	West Devon	SS5912001730	1.4 km	SW/202149/001
MEMORIAL GARDENS PS	East Devon	SY2300089160	1.4 km	SW/202679/002
BARN PARK ROAD CSO	Plymouth	SX4774256500	1.4 km	SW/301755/002
CLIFTON ROAD/JCT ALBERT ROAD CSO	Exeter	SX9293593015	1.3 km	SW/201918/003
THORNTON HILL CSO	Exeter	SX9229593438	1.3 km	SW/201916/003
PLAYING FIELDS CSO	West Devon	SX5131289422	1.3 km	SW/301828/001
34 CLIFTON ROAD CSO	Exeter	SX9292393001	1.3 km	SW/201917/003
HUXHAMS CROSS WWTW	South Hams	SX7828563406	1.3 km	SW/202197/CS/01/001
DALE ROAD CSO	Plymouth	SX4774155526	1.3 km	SW/301780/002
28 CLIFTON ROAD CSO	Exeter	SX9290392976	1.3 km	SW/EPRDB3293NC/004
CHUTE STREET CSO	Exeter	SX9288992963	1.3 km	SW/201919/003
WELL STREET CSO	Exeter	SX9270093520	1.3 km	SW/201371/003
ST SIDWELLS SCHOOL CSO	Exeter	SX9247093260	1.2 km	SW/201374/003
PENNSYLVANIA ROAD CSO	Exeter	SX9238093300	1.2 km	SW/201372/003
14 CLIFTON ROAD CSO	Exeter	SX9285192921	1.2 km	SW/201920/003
PEVERELL PARK ROAD CSO	Plymouth	SX4781956663	1.2 km	SW/301742/002
SEARLE STREET CSO	Mid Devon	SS8307000051	1.1 km	SW/201878/001
PAR SEWAGE TREATMENT WORKS	Cornwall	SX0685052680	1.1 km	SW/031299/SS/01/004
COLYTON CHANTRY CSO	East Devon	SY2560094200	1.1 km	SW/NRA-SW-1138/003
19 HEAVITREE ROAD CSO	Exeter	SX9275292817	1.1 km	SW/201921/003
139 OUTLAND ROAD CSO	Plymouth	SX4739157004	1.1 km	SW/301761/001
PARIS STREET CSO	Exeter	SX9255092840	1.0 km	SW/201895/003
TREGADILLET PS	Cornwall	SX2961784002	1.0 km	SW/301625/002
HOWELL ROAD CSO	Exeter	SX9216093130	1.0 km	SW/201376/003
CAMBRIDGE LANE COMBINED SEWER OF	Plymouth	SX4749854833	1.0 km	SW/301740/002
CENTRAL STATION YARD CSO	Exeter	SX9202093140	1.0 km	SW/201370/003
PARKLAND DRIVE PUMPING STATION	Exeter	SX9507091369	1.0 km	SW/201632/002
ETON PLACE CSO	Plymouth	SX4762754980	0.9 km	SW/301779/003
ALLOTMENT CSO	Plymouth	SX4760556977	0.9 km	SW/301781/001
TRACEY COURT CSO	Plymouth	SX4743054810	0.9 km	SW/301787/002
JUBILEE BUILDINGS	Plymouth	SX4752657128	0.9 km	SW/301714/001
HEAVITREE PLEASURE GROUND CSO	Exeter	SX9413692494	0.9 km	SW/201908/003
WHITFORD ROAD COMBINED SEWER O/F	East Devon	SY2712094800	0.9 km	SW/SWWA 115/002
PENNYCOMEQUICK HILL CSO	Plymouth	SX4747055280	0.9 km	SW/303406/004
NORTH STREET CAR PARK CSO	Mid Devon	SS8329200386	0.9 km	SW/201872/003
2 BICKHAM PARK ROAD CSO	Plymouth	SX4769356995	0.9 km	SW/301747/002
R/O GARAGES LANHYDROCK ROAD CSO	Plymouth	SX4906854805	0.9 km	SW/301736/001
DIX'S FIELD CSO	Exeter	SX9254092710	0.9 km	SW/EPRDB3493NV/004
DUNSFORD ROAD CSO	Exeter	SX9081991705	0.8 km	SW/201932/003
78 BEAUMONT ROAD CSO	Plymouth	SX4910054840	0.8 km	SW/301782/002
ST MERRYN COMBINED SEWER OVERFLOW	Cornwall	SW8725075340	0.8 km	SW/300592/002
EXETER BOWLING CLUB CSO	Exeter	SX9264692620	0.8 km	SW/201922/002
YELLAND PUMPING STATION	North Devon	SS4833031880	0.8 km	SW/203126/004
SEYMOUR AVENUE/BEAUMONT RD CSO	Plymouth	SX4909354867	0.8 km	SW/301735/003
BELLE PARADE CSO	Mid Devon	SS8339200376	0.8 km	SW/201871/003
NORTH LAWN COURT CSO	Exeter	SX9372292764	0.8 km	SW/201911/003
COT VALLEY PUMPING STATION	Cornwall	SW3637030600	0.8 km	SW/303092/002
FIRST AVENUE SERVICE LANE CSO	Exeter	SX9367092810	0.8 km	SW/201913/005
BUDDLE LANE CSO	Exeter	SX9083091780	0.8 km	SW/201931/005
BOSORNE ROAD SEWER OVERFLOW	Cornwall	SW3647031230	0.8 km	SW/303091/001
JEWSONS YARD CSO	Mid Devon	SX8405699540	0.8 km	SW/201866/001
1 EDNA TERRACE CSO	Plymouth	SX4950054890	0.8 km	SW/301737/002
21 WONFORD STREET CSO	Exeter	SX9410691980	0.8 km	SW/201909/003
SEYMOUR AVENUE/SALISBURY RD CSO	Plymouth	SX4902754963	0.7 km	SW/301734/003
TINTAGEL CASTLE ROAD PUMP STATION	Cornwall	SX0538288626	0.7 km	SW/NPSWQD008114/001
DOBWALLS SPS	Cornwall	SX2156064550	0.7 km	SW/NRA-SW-3206/001
LOWER AVENUE CSO	Exeter	SX9362292967	0.7 km	SW/201912/002
PENNYCOMEQUICK ROUNDABOUT CSO	Plymouth	SX4723055247	0.7 km	SW/301717/002
COURT BARTON FARM CSO	Mid Devon	SS7327008198	0.7 km	SW/201846/001
PORT ISAAC WWTW CSO	Cornwall	SW9977080400	0.7 km	SW/2895/71/002
178 BEAUMONT ROAD CSO	Plymouth	SX4938254986	0.7 km	SW/301789/003
MAGDALEN ROAD CSO	Exeter	SX9255492447	0.6 km	SW/201923/003
ST JOHN STW	Cornwall	SX4094053700	0.6 km	SW/302135/001
BARTON HILL ROAD CSO	Torbay	SX9070066310	0.6 km	SW/201940/003
OPP 65 HIGHWEEK ROAD CSO	Teignbridge	SX8534071680	0.6 km	SW/203338/001
CHURCH STREET COMBINED SEWER OVERFL	Mid Devon	SS8359500281	0.6 km	SW/201864/003
ILSHAM VALLEY PUMPING STATION	Torbay	SX9357063350	0.6 km	SW/200977/004
CAUSEWAY CLOSE CSO	Torridge	SS4498029244	0.6 km	SW/302146/003
JOCKEY HILL CSO	Mid Devon	SS8363800456	0.6 km	SW/201869/002
45 CRAVEN AVENUE CSO	Plymouth	SX4920855084	0.6 km	SW/301771/003
ROSE COTTAGE CSO	Teignbridge	SX8171294176	0.6 km	SW/201705/001
EXETER COLLEGE CSO	Exeter	SX9174192990	0.6 km	SW/201375/003
PORTWRINKLE TANK CSO	Cornwall	SX3566853847	0.6 km	SW/301864/002
VICTORIA PARK CSO	Plymouth	SX4715055130	0.6 km	SW/301766/002
MAER ROAD SEWAGE PUMPING STATION	East Devon	SY0115880222	0.5 km	SW/200126/PC/01/004
LAIRA PARK CSO	Plymouth	SX4990555720	0.5 km	SW/301776/003
OKEHAMPTON ROAD CSO	Exeter	SX9086092310	0.5 km	SW/201903/005
CROWNHILL ROAD CSO	Plymouth	SX4837758865	0.5 km	SW/301721/002
TREVONE PUMPING STATION	Cornwall	SW8915675908	0.5 km	SW/300014/003
ST MARTINS CRESCENT CSO	Cornwall	SW6415540348	0.5 km	SW/301812/002
ERNESETTLE LANE SPORTSGROUND CSO	Plymouth	SX4467159920	0.5 km	SW/301770/003
PERRANUTHNOE PUMPING STATION	Cornwall	SW5397029420	0.5 km	SW/300828/002
DRIMPTON STW - EO	Dorset	ST4173105666	0.5 km	SW/DRA 1517/001
CHURCH LANE COMBINED SEWER OVERFLOW	Mid Devon	SS8368700253	0.5 km	SW/201870/003
GRANGE ROAD CSO	Cornwall	SW6602027210	0.5 km	SW/033997/CS/01/004

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).