Top of the Poops | Constituency Sewage Map | Neath and Swansea East

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Live data for Neath and Swansea East in 2026

So far this year (as of 26 Oct 2026, 03:45) there has been 13,916 hours of sewage overflows, from 80 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s - that's 1.61 years!

Totals for Neath and Swansea East in 2025

73 Sites polluted by Dwr Cymru Welsh Water

3,473 sewage dumps

21,586 hours duration

Sewage pollution map of Neath and Swansea East: 3,473 spills in 2025, lasting 21,586 hours, by Dwr Cymru Welsh Water

That's 2.5 years. On average 9.5 times a day

Change Over Time

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Constituencies near Neath and Swansea East

Waterways in Neath and Swansea East

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Neath and Swansea East in 2025. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 1 of the total 76 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year. Of these 1 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Dulais	CRYNANT STW CRYNANT NEATH	142	2,700	99.8
Dwr Cymru Welsh Water	Swansea Bay	BAGLAN SPS BRITON FERRY NEATH	154	1,876	99.8
Dwr Cymru Welsh Water	River Neath	CWMGWRCH STW CWMGWRCH NEATH	113	1,331	99.9
Dwr Cymru Welsh Water	River Dulais	Nant-y-Cafan CSO, Dulais Valley	116	1,196	97.5
Dwr Cymru Welsh Water	River Camnant	Onllwyn SPS	111	1,117	99.9
Dwr Cymru Welsh Water	River Tawe	Inco CSO Clydach Swansea	114	1,083	99.2
Dwr Cymru Welsh Water	Neath Estuary	FABIAN WAY SPS FABIAN WAY SWANSEA	60	974	99.9
Dwr Cymru Welsh Water	River Dulais	YS.MARCH CRYNANT SWO 2C	101	967	86
Dwr Cymru Welsh Water	Neath Estuary	Dynevor Junction SPS	108	934	99.9
Dwr Cymru Welsh Water	Melin Court Brook	MOSES ROW CSO RESOLVEN NEATH	67	626	99.9
Dwr Cymru Welsh Water	River Neath	RESOLVEN STW STORM TANKS NEATH	67	585	99.2
Dwr Cymru Welsh Water	Estuarial Waters Of River Neath	Fairfield SPS, Neath	109	538	99.8
Dwr Cymru Welsh Water	River Neath	Park Avenue CSO	110	517	97.8
Dwr Cymru Welsh Water	River Neath	Chainbridge CSO, Glyn-Neath	67	505	99.2
Dwr Cymru Welsh Water	Estuarial Waters Of River Neath	Melincryddan SPS	76	418	99.8
Dwr Cymru Welsh Water	River Neath	Clyne SPS Clyne Neath Neath Port T	57	405	71.4
Dwr Cymru Welsh Water	Nant-Bran	Felin Fran CSO Walters Rd Llansamle	58	398	98.1
Dwr Cymru Welsh Water	River Clydach	Neath Abbey SPS	88	384	96
Dwr Cymru Welsh Water	River Clydach	CSO 27 Farmers Road Pumping Station	68	382	99.9
Dwr Cymru Welsh Water	Nant-Y-Fendrod	Samlet Rd CSO 103	56	353	99
Dwr Cymru Welsh Water	River Neath	CSO AT REAR GODFREY AVENUE GLYNNEATH NPT	78	293	99.9
Dwr Cymru Welsh Water	River Tawe	Pentrechwyth Rd CSO	58	291	99.4
Dwr Cymru Welsh Water	River Neath Via Surface Water Sewer	Penrhiwtyn SPS	40	259	99.9
Dwr Cymru Welsh Water	Tennant Canal	OLD ROAD CSO OLD ROAD SKEWEN NEATH	83	253	99.9
Dwr Cymru Welsh Water	Lower Clydach River	Canal CSO. Towpath Off Hebron Road, Clydach	69	224	99.3
Dwr Cymru Welsh Water	Lower Clydach River	Storm Overflow at Heol Eithrim	51	216	97.5
Dwr Cymru Welsh Water	River Clydach	CSO NO 10 30M U/S ROADBRIDGE	82	214	99.3
Dwr Cymru Welsh Water	River Clydach	Rear No 1 Dyffryn V'W Bryn Coch CSO	53	211	99.9
Dwr Cymru Welsh Water	River Neath	CSO 48 NEATH RIVER BRIDGE ADJ CALOR	86	183	99.9
Dwr Cymru Welsh Water	River Dulais	BRYNDULAIS CSO	46	150	99.9
Dwr Cymru Welsh Water	Tennant Canal	CSO 49 LLANGATWG SCHOOL ABERDULIAS	33	123	99.9
Dwr Cymru Welsh Water	Nant Bran	PENIEL GREEN CSO PENIEL GREEN ROAD	33	122	99.4
Dwr Cymru Welsh Water	River Tawe	Glais CSO	36	117	99.9
Dwr Cymru Welsh Water	River Tawe	Glais SPS	36	117	99.9
Dwr Cymru Welsh Water	Esturial Water Of River Neath	Quay Road PS Town Centre Neath	64	104	99.6
Dwr Cymru Welsh Water	Sea Outfall	BALDWINS CRESCENT SPS	42	102	99.9
Dwr Cymru Welsh Water	Swansea Bay	Swansea Waste Water Treatment Works	10	100	99.9
Dwr Cymru Welsh Water	River Neath	CSO IN FOOTPATH ADJ BETHEL RD	37	94	99.9
Dwr Cymru Welsh Water	Estuarial Waters Of River Neath	Pentreffynnon Sewage Pumping Station at Neath Abbey Ind Estate, Neath	50	93	99.8
Dwr Cymru Welsh Water	River Neath Via Surface Water Sewer	Plas-Y-Coed CSO, Glynneath	57	81	99.4
Dwr Cymru Welsh Water	River Neath	Gnoll Park Road CSO	71	69	99.4
Dwr Cymru Welsh Water	Neath Estuary	ABERDULAIS SPS	26	68	99.9
Dwr Cymru Welsh Water	River Tawe	Bonymaen Rd CSO	52	64	98.4
Dwr Cymru Welsh Water	River Clydach	CSO 8 Bryncoch 7B Bryncoch	15	64	99.9
Dwr Cymru Welsh Water	To Crymlyn Brook Via A Surface Water Culvert	Skewen SPS Park Avenue Lonlas Neath	20	57	99.9
Dwr Cymru Welsh Water	River Tawe	Opp 74 Bonymaen Rd CSO, Swansea ,	49	56	98.6
Dwr Cymru Welsh Water	River Neath	GUNSIGHT OVERFLOW SWO 11 CSO	24	49	99.9
Dwr Cymru Welsh Water	Estuarial Waters Of Llantwit Stream	Llantwit Church SPS	21	48	99.9
Dwr Cymru Welsh Water	Tidal River Neath	Llandarcy 36" Outfall	45	40	98.8
Dwr Cymru Welsh Water	River Neath	Cadoxton Road CSO Cadoxton Road	3	39	99.9
Dwr Cymru Welsh Water	River Clydach	Longford Road Neath Abbey CSO	14	32	99.8
Dwr Cymru Welsh Water	Gnoll Brook	CSO 33 CIMLA ROAD CIMLA NEATH	12	31	98.9
Dwr Cymru Welsh Water	River Dulais	CSO Outside Visitor Centre, Aberdulais	7	30	99.9
Dwr Cymru Welsh Water	Sea Outfall	TEMPORARY INCREASED DIS. FROM	10	30	99.5
Dwr Cymru Welsh Water	River Neath	Commercial Road Sewage Pumping Station	34	28	99.9
Dwr Cymru Welsh Water	Tennant Canal	Church Road CSO Church Road Neath	7	26	99.9
Dwr Cymru Welsh Water	Nant-Y-Fendrod	DRUMAU FARM BIRCHGROVE RD P.S. CSO	14	26	99.9
Dwr Cymru Welsh Water	Crymlyn Bog	CSO HALFWAY CRYMLYN ROAD PS	12	26	95.6
Dwr Cymru Welsh Water	River Neath	HEOL ILLTYD CSO BRYNCOCH NPT	9	26	99.9
Dwr Cymru Welsh Water	Nant Bran Via Culverted Watercourse	Heol Dulais CSO at Birchgrove	11	20	99.5
Dwr Cymru Welsh Water	River Clydach	Monastery Road Cso (Cso 35) Neath	14	20	86.8
Dwr Cymru Welsh Water	Hollins Clough Ditch	CSO 9 CIMLA COMMON CIMLA NEATH	6	17	99.9
Dwr Cymru Welsh Water	Eastland Brook	St Joseph's Church CSO	15	17	99.9
Dwr Cymru Welsh Water	Nant Bran Via Culvert	Trallwyn Community Centre CSO	31	14	95.2
Dwr Cymru Welsh Water	Neath - Conf With Nedd Fechan And Mellte To Tl	CSO at Resolven Above Clydach Brook	17	8	99.9
Dwr Cymru Welsh Water	Nant Bran	Adj 27 Bethel Rd Llansamlet CSO	5	4	91.7
Dwr Cymru Welsh Water	Surface Water Culvert, An Nant Bran	Birchgrove Road CSO	9	4	95.9
Dwr Cymru Welsh Water	Neath Canal	Park Street CSO Park Street Tonna	10	4	99.9
Dwr Cymru Welsh Water	Estuarial Waters Of Swansea Ba	SWO. QUEENS DOCK (POINT 92 NEW	10	2	99.9
Dwr Cymru Welsh Water	Neath - Conf With Nedd Fechan And Mellte To Tl	Adj Health Centre CSO, Dyfed Rd	5	1	96.6
Dwr Cymru Welsh Water	Nant Y Fendrod - Headwaters To Conf With Tawe	Birchgrove CSO	4	1	99.8
Dwr Cymru Welsh Water	River Tawe	Heol Y Nant/Sybil Street Clydach CSO	4	1	79.2
Dwr Cymru Welsh Water	Tennant Cannal	CSO at R/O 38 Caenant Terrace, Neath	1	0	100
Dwr Cymru Welsh Water	River Dulais	BRYNDULAIS (SWO 2A)	0	0	0
Dwr Cymru Welsh Water	River Tawe	CSO at QUARRY ROAD CLYDACH (POINT 125)	0	0	75.9
Dwr Cymru Welsh Water	Unnamed Stream To Tennant Canal	New Road Nursing Home CSO, Skewen	0	0	100

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.

Analysing sewage pollution by the Water Industry

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