Overflow history upstream of River Severn at Ironbridge

The spot's forecast · For event organisers

This page lists the monitored storm overflows upstream of this spot and how often each spilled in each year. It is not a water test, and it does not say whether the water is fit to swim in. It does not include farm runoff, misconnected drains, treated sewage effluent, wildlife or overflows without a monitor. A year's count depends on how long the monitor worked, shown as monitor uptime.

Each year, all overflows upstream

Year	Overflows with a return	Spills	Spill hours	Spill hours, weighted by reach
2021	63	2,179	20,974	360
2022	81	1,893	14,361	324
2023	85	2,796	27,469	661
2024	85	2,529	14,606	299
2025	84	1,565	5,679	92

Reach is the share of a spill's bacteria SwimSignal's model expects to arrive here, after die-off on the way and dilution by the river. Weighting by it counts an hour of spilling just upstream for far more than one 40 km away. Spills are counted by the Environment Agency's 12/24 method: any discharge in the first 12 hours counts as one spill, then one more for each 24 hours with any discharge. How reach is worked out.

The overflows, by reach

All 87, the one whose spills matter most here first. Hours away is how long sewage takes to arrive at the model's river speed.

Overflow and id	Company	km upstream	Hours away	Reach	Spills 2023	Spills 2024	Spills 2025	Spill hours 2025	Monitor uptime 2025
Brompton, Cross Houses sewage works storm tank overflow Brompton - Cross Houses STW (Ssto) · SVT00688	Severn Trent Water	21.1	12	11%	0	1	15	80	100%
Rushmoor sewage works storm tank overflow Rushmoor STW (Ssto) · SVT01930	Severn Trent Water	28.7	16	8%	5	57	18	164	99%
Rushmoor sewage works overflow Rushmoor STW (CSO) · SVT01931	Severn Trent Water	28.7	16	8%	16	21	9	22	100%
Monkmoor sewage works storm tank overflow Monkmoor STW (Ssto) · SVT02039	Severn Trent Water	29.2	16	7%	103	94	34	193	100%
Monkmoor sewage works overflow Monkmoor STW (CSO) · SVT02038	Severn Trent Water	29.2	16	7%	37	33	19	61	100%
Shrewsbury, Ditherington Rd storm overflow Shrewsbury - Ditherington RD (CSO) · SVT00773	Severn Trent Water	33.0	18	5%	43	53	26	22	100%
Shrewsbury, Millers Green storm overflow Shrewsbury - Millers Green (CSO) · SVT01619	Severn Trent Water	33.0	18	5%	32	31	26	21	100%
Shrewsbury, Clive Road storm overflow Shrewsbury - Clive Road (CSO) · SVT00583	Severn Trent Water	33.3	18	5%	55	57	42	50	98%
Shrewsbury, Spring Grdns/Sultan Rd storm overflow Shrewsbury -Spring Grdns/Sultan RD (CSO) · SVT02130	Severn Trent Water	33.4	19	5%	6	9	7	4	95%
Shrewsbury, Underdale Rd/Ashley St storm overflow Shrewsbury -Underdale RD/Ashley ST (CSO) · SVT02364	Severn Trent Water	34.0	19	5%	4	5	9	12	99%
Shrewsbury, Underdale Road 49 storm overflow Shrewsbury - Underdale Road 49 (CSO) · SVT00006	Severn Trent Water	34.1	19	5%	0	0	0	0	99%
Castlefields, Victoria St storm overflow Castlefields - Victoria ST (CSO) · SVT01894	Severn Trent Water	34.5	19	5%	120	46	27	48	97%
Castlefields, Burton Street storm overflow Castlefields - Burton Street (CSO) · SVT00435	Severn Trent Water	34.2	19	5%	45	22	17	32	100%
Shrewsbury, Queen Street storm overflow Shrewsbury - Queen Street (CSO) · SVT02035	Severn Trent Water	34.2	19	5%	2	0	0	0	96%
Castlefields, Dana Steps storm overflow Castlefields - Dana Steps (CSO) · SVT00725	Severn Trent Water	34.7	19	5%	111	47	26	44	97%
Shrewsbury, St Marys Water Ln storm overflow Shrewsbury - ST Marys Water LN (CSO) · SVT02677	Severn Trent Water	35.0	19	5%	–	48	18	15	76%
Shrewsbury, St Marys Water Lane storm overflow Shrewsbury - ST Marys Water Lane (CSO) · SVT02147	Severn Trent Water	35.0	19	5%	1	–	–	–	–
Condover, Brook Close pumping station overflow Condover - Brook Close SPS (CSO) · SVT00629	Severn Trent Water	29.0	16	4%	5	28	3	17	100%
High Ercall, Church Road storm overflow High Ercall - Church Road (CSO) · SVT01115	Severn Trent Water	31.8	18	3%	37	26	12	17	100%
High Ercall sewage works overflow High Ercall (STW) · SVT01116	Severn Trent Water	31.8	18	3%	6	20	4	27	100%
Roden sewage works overflow Roden STW (CSO) · SVT01902	Severn Trent Water	34.0	19	3%	22	19	19	39	100%
Shrewsbury, Longden Coleham pumping station overflow Shrewsbury - Longden Coleham PS (CSO) · SVT00706	Severn Trent Water	35.4	20	2%	46	24	24	57	100%
Shrewsbury, Victoria Av storm overflow Shrewsbury - Victoria AV (CSO) · SVT01014	Severn Trent Water	35.6	20	2%	128	43	12	14	100%
Ellerdine sewage works storm tank overflow Ellerdine STW (Ssto) · SVT00856	Severn Trent Water	37.6	21	2%	0	0	0	0	100%
Shrewsbury, Abbey Foregate 2 storm overflow Shrewsbury - Abbey Foregate 2 (CSO) · SVT00016	Severn Trent Water	36.3	20	2%	38	49	26	29	100%
Shrewsbury, Old Coleham storm overflow Shrewsbury - OLD Coleham (CSO) · SVT01713	Severn Trent Water	35.6	20	2%	49	45	27	51	100%
Shrewsbury, Old Coleham (Bridge) storm overflow Shrewsbury - OLD Coleham (Bridge) (CSO) · SVT01712	Severn Trent Water	35.5	20	2%	49	58	24	18	100%
Shrewsbury, Coleham Head storm overflow Shrewsbury - Coleham Head (CSO) · SVT02032	Severn Trent Water	35.5	20	2%	62	48	25	82	90%
Shrewsbury, Abbey Forgate/Brook Rd storm overflow Shrewsbury -Abbey Forgate/Brook RD (CSO) · SVT00380	Severn Trent Water	35.8	20	2%	0	1	–	–	–
Shrewsbury, Scott Street storm overflow Shrewsbury - Scott Street (CSO) · SVT01955	Severn Trent Water	36.0	20	2%	1	0	3	0	88%
Shrewsbury, Victoria Ave/Cres La storm overflow Shrewsbury - Victoria AVE/Cres LA (CSO) · SVT02413	Severn Trent Water	36.1	20	2%	91	27	20	35	89%
Shrewsbury, Sutton Road 10 storm overflow Shrewsbury - Sutton Road 10 (CSO) · SVT00001	Severn Trent Water	36.6	20	2%	20	21	10	6	100%
Shrewsbury, Quarry Pk storm overflow Shrewsbury - Quarry PK (CSO) · SVT01837	Severn Trent Water	36.4	20	2%	97	24	15	20	100%
Shrewsbury, Victoria Ave storm overflow Shrewsbury - Victoria AVE (CSO) · SVT02414	Severn Trent Water	36.3	20	2%	20	63	25	52	92%
Shrewsbury, Abbey Foregate 1 storm overflow Shrewsbury - Abbey Foregate 1 (CSO) · SVT02282	Severn Trent Water	36.4	20	2%	0	0	6	1	100%
Shrewsbury, Earls View Hill storm overflow Shrewsbury - Earls View Hill (CSO) · SVT01813	Severn Trent Water	36.9	20	2%	26	37	19	19	100%
Shrewsbury, 5 Severn Terrace storm overflow Shrewsbury - 5 Severn Terrace (CSO) · SVT00007	Severn Trent Water	37.8	21	2%	103	57	38	34	100%
Shrewsbury, Castle Foregate storm overflow Shrewsbury - Castle Foregate (CSO) · SVT00490	Severn Trent Water	38.1	21	2%	72	63	29	51	99%
Frankwell, Water Lane (Boathouse) storm overflow Frankwell - Water Lane (Boathouse) (CSO) · SVT00516	Severn Trent Water	37.1	21	2%	105	23	14	16	96%
Frankwell, Water La (Playground) storm overflow Frankwell - Water LA (Playground) (CSO) · SVT01452	Severn Trent Water	37.2	21	2%	98	34	15	12	100%
Shrewsbury, Bridge St/Hills Lane storm overflow Shrewsbury - Bridge ST/Hills Lane (CSO) · SVT02031	Severn Trent Water	37.4	21	2%	27	23	9	2	92%
Frankwell, Quarry View storm overflow Frankwell – Quarry View (CSO) · SVT01621	Severn Trent Water	37.2	21	2%	0	3	4	1	100%
Shrewsbury, Water Lane pumping station overflow Shrewsbury - Water Lane SPS (CSO) · SVT02037	Severn Trent Water	37.3	21	2%	0	0	2	1	100%
Shrewsbury, Claremont Bank (High) storm overflow Shrewsbury - Claremont Bank (High) (CSO) · SVT02143	Severn Trent Water	37.3	21	2%	8	8	7	1	93%
Shrewsbury, Smithfield Rd/Mardol storm overflow Shrewsbury - Smithfield RD/Mardol (CSO) · SVT01493	Severn Trent Water	37.4	21	2%	12	10	2	0	100%
Frankwell, White Horse Passage storm overflow Frankwell - White Horse Passage (CSO) · SVT02540	Severn Trent Water	37.5	21	2%	3	7	4	1	100%
Shrewsbury, Smithfield Rd/Roushill storm overflow Shrewsbury -Smithfield RD/Roushill (CSO) · SVT02073	Severn Trent Water	37.6	21	2%	38	11	16	8	100%
Shrewsbury, Coton Hill 75 storm overflow Shrewsbury - Coton Hill 75 (CSO) · SVT02727	Severn Trent Water	37.9	21	2%	–	–	22	10	99%
Dorrington sewage works overflow Dorrington STW (CSO) · SVT00783	Severn Trent Water	34.5	19	2%	44	34	32	50	100%
Shrewsbury, Coton Hill (The Flash) storm overflow Shrewsbury - Coton Hill (THE Flash) (CSO) · SVT00643	Severn Trent Water	38.4	21	2%	48	18	23	7	100%
Shrewsbury, The Rocks storm overflow Shrewsbury - THE Rocks (CSO) · SVT02302	Severn Trent Water	39.6	22	2%	24	37	14	85	100%
Bayston Hill, Sharpstones Lane storm overflow Bayston Hill - Sharpstones Lane (CSO) · SVT01986	Severn Trent Water	41.2	23	2%	30	32	17	21	100%
Great Bolas sewage works overflow Great Bolas STW (CSO) · SVT00990	Severn Trent Water	39.7	22	2%	57	82	50	209	99%
Hook-A-Gate storm sewage overflow Hook-A-Gate (SSO) · SVT01175	Severn Trent Water	43.8	24	2%	43	25	24	220	100%
Ironbridge, Dale End storm sewage overflow Ironbridge - Dale END (SSO) · SVT00719	Severn Trent Water	0.3	under 1	2%	15	28	15	19	100%
Bayston Hill, Parrs Lane storm overflow Bayston Hill - Parrs Lane (CSO) · SVT01763	Severn Trent Water	43.6	24	2%	0	0	0	0	100%
Shrewsbury, The Mount/Thornhill Rd storm overflow Shrewsbury -THE Mount/Thornhill RD (CSO) · SVT02306	Severn Trent Water	40.9	23	2%	5	12	25	47	100%
Hanwood, Caradoc View storm sewage overflow Hanwood - Caradoc View (SSO) · SVT00475	Severn Trent Water	45.5	25	1%	13	28	9	44	100%
Hanwood, Weir Road storm sewage overflow Hanwood - Weir Road (SSO) · SVT02481	Severn Trent Water	47.1	26	1%	26	24	14	129	100%
Tibberton, Greenhouses storm overflow Tibberton - Greenhouses (CSO) · SVT02314	Severn Trent Water	43.9	24	1%	35	47	21	45	99%
Much Wenlock sewage works storm tank overflow Much Wenlock STW (Ssto) · SVT01592	Severn Trent Water	7.8	4	1%	22	75	52	559	97%
Buildwas, Park View sewage works overflow Buildwas - Park View STW (CSO) · SVT00403	Severn Trent Water	3.6	2	1%	1	3	0	0	100%
Cressage storm overflow Cressage (CSO) · SVT00674	Severn Trent Water	11.1	6	1%	0	3	0	0	100%
Much Wenlock, Priory storm overflow Much Wenlock - Priory (CSO) · SVT02154	Severn Trent Water	8.7	5	0%	50	76	37	57	100%
Bicton, The Oval storm sewage overflow Bicton - THE Oval (SSO) · SVT02299	Severn Trent Water	52.6	29	0%	25	42	22	160	88%
CRUCKTON-5 Church Close storm overflow Cruckton-5 Church Close (CSO) · SVT00699	Severn Trent Water	48.5	27	<1%	1	4	1	1	99%
Shrewsbury, Harlescott Cres storm sewage overflow Shrewsbury - Harlescott Cres (SSO) · SVT02033	Severn Trent Water	33.6	19	<1%	0	0	0	0	100%
Wem, Aston Road sewage works storm tank overflow WEM - Aston Road STW (Ssto) · SVT02498	Severn Trent Water	58.3	32	<1%	78	131	13	116	100%
Wem, Wellgate storm overflow WEM - Wellgate (CSO) · SVT02488	Severn Trent Water	58.4	32	<1%	35	43	30	57	100%
Wellington, Morrisons storm overflow Wellington - Morrisons (CSO) · SVT02490	Severn Trent Water	35.8	20	<1%	19	24	13	32	96%
Wellington, Gas Works storm overflow Wellington - GAS Works (CSO) · SVT02489	Severn Trent Water	35.8	20	<1%	3	3	0	0	97%
Shrewsbury, Kingsland Road storm overflow Shrewsbury - Kingsland Road (CSO) · SVT00031	Severn Trent Water	36.1	20	<1%	81	0	8	15	100%
Somerwood, Sunningdale storm overflow Somerwood - Sunningdale (CSO) · SVT02098	Severn Trent Water	27.0	15	<1%	28	19	7	30	100%
Bomere Heath sewage works storm tank overflow Bomere Heath STW (Ssto) · SVT00304	Severn Trent Water	48.2	27	<1%	50	72	62	998	100%
Pontesbury sewage works overflow Pontesbury (STW) · SVT01809	Severn Trent Water	54.3	30	<1%	95	101	53	503	100%
Forest Glen storm sewage overflow Forest Glen (SSO) · SVT00916	Severn Trent Water	39.2	22	<1%	2	0	0	0	100%
Wellington, Bucks Head storm overflow Wellington - Bucks Head (CSO) · SVT00401	Severn Trent Water	40.1	22	<1%	22	31	28	15	99%
Wellington, Urban Gardens storm overflow Wellington - Urban Gardens (CSO) · SVT00402	Severn Trent Water	40.1	22	<1%	1	4	0	0	100%
Edgmond sewage works overflow Edgmond (STW) · SVT00844	Severn Trent Water	42.6	24	<1%	33	51	23	151	98%
Minsterley, The Grove storm overflow Minsterley - THE Grove (CSO) · SVT02219	Severn Trent Water	58.5	32	<1%	41	36	14	81	99%
Forton sewage works overflow Forton (STW) · SVT00919	Severn Trent Water	57.8	32	<1%	0	0	–	–	–
Pontesbury, Station Road storm overflow Pontesbury - Station Road (CSO) · SVT01808	Severn Trent Water	54.8	30	<1%	59	58	42	125	96%
Bicton, Calcott Lane storm sewage overflow Bicton - Calcott Lane (SSO) · SVT00450	Severn Trent Water	41.0	23	<1%	5	10	0	0	100%
Prees, Mill Street storm overflow Prees - Mill Street (CSO) · SVT01569	Severn Trent Water	59.9	33	<1%	0	0	151	325	99%
Baschurch, Walford Heath pumping station overflow Baschurch - Walford Heath SPS (EO) · SVT02424	Severn Trent Water	50.4	28	<1%	36	35	15	107	98%
Wem, Drawwell Lane pumping station overflow WEM - Drawwell Lane SPS (CSO) · SVT02496	Severn Trent Water	58.8	33	<1%	11	17	6	49	100%
Wem, The Grove 36 (Rear Garden) storm overflow WEM - THE Grove 36 (Rear Garden) (CSO) · SVT02289	Severn Trent Water	59.2	33	<1%	15	28	15	34	99%

A dash: no annual return for that overflow in that year.

Sources and credits

Storm overflow annual returns: © Environment Agency copyright and/or database right 2025, Open Government Licence v3.0. Overflow positions: the water companies via the National Storm Overflow Hub, CC BY 4.0. River network: contains OS data © Crown copyright and database right 2026 (OS Open Rivers). Traced and weighted by SwimSignal (swimsignal.co.uk), whose method is at swimsignal.co.uk/methods.html. All credits and licences.