Preseli Pembrokeshire was polluted by sewage 7,659 times in 2023
lasting 91,401 hours - that's 10.58 years!
- but monitoring was disabled in some locations, so could be more

Select the constituency from the drop-down

Constituency

✔ means we have experimental daily data since 2023

Totals for Preseli Pembrokeshire in 2023

96 Sites polluted by Dwr Cymru Welsh Water

7,659 sewage dumps
91,401 h duration

That's 10.58 years! On average 21 times a day

Change Over Time

Take Action

Your local MP is Stephen Crabb (Conservative) - Find out more about their interests, donors, and voting at They Work For You

Constituencies near Preseli Pembrokeshire

Waterways in Preseli Pembrokeshire

Pollution Summary 2023

Here are all the reported sewage overflow totals for Preseli Pembrokeshire in 2023. 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 2 of the total 107 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Taf	Hermon STW Storm Overflow Hermon	214	3,888	99.9
Dwr Cymru Welsh Water	River Taf	Settled Storm Overflow at Llanfyrnach Wastewater Treatment Works	168	3,585	100
Dwr Cymru Welsh Water	Western Cleddau	Pont-Yr-Hafod Sewage Pumping Station	155	3,462	98.6
Dwr Cymru Welsh Water	River Cleddau	SCLEDDAU EO AND CSO	153	3,161	100
Dwr Cymru Welsh Water	River Anghof	Puncheston WwTW Inlet CSO	160	2,915	100
Dwr Cymru Welsh Water	Cartlet Brook	CLARBESTON STW HAVERFORDWEST PEMBS	218	2,720	100
Dwr Cymru Welsh Water	Coastal Waters At Porth Clais	ST DAVID'S WWTW ST DAVID'S PEMBS	135	2,631	100
Dwr Cymru Welsh Water	Hazelbeach Stream	Waterston WwTW Inlet CSO	269	2,629	100
Dwr Cymru Welsh Water	River Teifi	ST DOGMAELS NORTH END PS CSO AND EO	130	2,592	99.9
Dwr Cymru Welsh Water	Newport Bay	CWM SEWAGE PUMPING STATION	142	2,548	99.8
Dwr Cymru Welsh Water	River Anghof	Letterston East STW SPS	120	2,453	100
Dwr Cymru Welsh Water	River Nevern	Blaenffos WwTW CSO	126	2,343	100
Dwr Cymru Welsh Water	River Morgenau	CSO at Boncath Wastewater Treatment Works	147	2,310	99.7
Dwr Cymru Welsh Water	West Cleddua	CSO@WOLFSDALE SPS	128	2,224	100
Dwr Cymru Welsh Water	River Rhydyfallen	MAENCLOCHOG STW CLYNDERWEN	118	2,202	100
Dwr Cymru Welsh Water	River Teifi	Cilgerran No 1 SPS	139	2,169	99.9
Dwr Cymru Welsh Water	Western Cleddau	Letterston West WwTW CSO	165	2,162	100
Dwr Cymru Welsh Water	River Taf, Via Surface Water Sewer	Llanfrynach SPS	114	2,098	100
Dwr Cymru Welsh Water	Aberdraw Stream	CSO at Trevine STW	162	2,059	100
Dwr Cymru Welsh Water	Deepford Brook	Clarbeston Road PS	116	2,015	100
Dwr Cymru Welsh Water	Aber Bach	Dinas Cross SPS	109	1,991	99.9
Dwr Cymru Welsh Water	River Nevern	CRYMYCH STW	155	1,734	98.8
Dwr Cymru Welsh Water	Afan Daulan	Iron Duke Clynderwen SPS	100	1,724	100
Dwr Cymru Welsh Water	River Gwaun	CSO at LLANYCHAER STW	97	1,664	99.9
Dwr Cymru Welsh Water	Nevern	Felindre Farchog SPS	87	1,592	100
Dwr Cymru Welsh Water	River Taf	CSO at Glogue STW	126	1,585	99.9
Dwr Cymru Welsh Water	Est'L Waters Milford Haven	DALE WWTW - CSO	100	1,483	100
Dwr Cymru Welsh Water	River Rhydyfallen-Uatroy Of Eastern Cleddau	CSO at Maenclochog STW	96	1,443	100
Dwr Cymru Welsh Water	Rubaxton Water	SPITTAL WWTW SPITTAL PEMBS	172	1,441	89.5
Dwr Cymru Welsh Water	Knock Brook	Keeston Works Inlet CSO	137	1,375	100
Dwr Cymru Welsh Water	River Teifi	Settled Storm Overflow at Cilgerran Wastewater Treatment Works	110	1,261	98.7
Dwr Cymru Welsh Water	Estuary East Of Sandy Haven	HERBRANDSTON WWTW HERBRANDSTON	69	1,248	100
Dwr Cymru Welsh Water	River Pilau	Pen Y Bryn PS	115	1,120	98.7
Dwr Cymru Welsh Water	Nolton Bay	CSO SERVING NOLTON HAVEN SPS	73	1,102	100
Dwr Cymru Welsh Water	Tidal Waters Of Western Cleddau	Merlins Bridge STW/Inlet SPS	123	985	99.9
Dwr Cymru Welsh Water	Sea	DINAS STW . .	80	963	96.6
Dwr Cymru Welsh Water	Tidal River Solva	SOLVA P.S. . .	59	961	99.9
Dwr Cymru Welsh Water	Fishguard Harbour	Fishguard Slade SPS	95	958	100
Dwr Cymru Welsh Water	Deadman'S Lake Stream	STEYNTON SPS	56	913	99.8
Dwr Cymru Welsh Water	Western Cleddau	Combined Sewer Overflow No. 6	151	839	97.1
Dwr Cymru Welsh Water	River Teifi	CSO at Rear of Teifi Inn PH, St Dogmaels	59	832	99.4
Dwr Cymru Welsh Water	Sandy Haven Pill	Tiers Cross WWTW Inlet CSO Pembrk	129	825	100
Dwr Cymru Welsh Water	Goodwick Brook	Parrog Goodwick SPS	66	811	100
Dwr Cymru Welsh Water	Llangwm Pill	EMERGENCY DISCHARGE FROM LLANG	77	766	99.9
Dwr Cymru Welsh Water	River Teifi	Cilgerran Flyght PS	38	715	86.8
Dwr Cymru Welsh Water	Tidal Waters Of Western Cleddau	Picton PS & Picton Fields CSO	133	646	100
Dwr Cymru Welsh Water	Swansell Brook	WALTON WEST STW BALANCING TANK	47	601	99.6
Dwr Cymru Welsh Water	Nant Hafren	EGLWYSWRW WWTW EGLWYSWRW NR NWPRT	25	496	100
Dwr Cymru Welsh Water	River Anghof	WOLFSCASTLE PS	61	472	99.9
Dwr Cymru Welsh Water	Milford Haven Waterway	BURTON FERRY WWTW NEYLAND PEMBS	73	457	99.9
Dwr Cymru Welsh Water	Milford Haven Waterway	MILFORD HAVEN STW	66	455	99.9
Dwr Cymru Welsh Water	Winterton Marsh Stream	MARLOES WORKS INLET . .	69	425	100
Dwr Cymru Welsh Water	River Teifi	Abercych SPS	89	390	99.4
Dwr Cymru Welsh Water	Monk Haven Stream	SPS at St Ishmaels WwTW	19	359	8.4
Dwr Cymru Welsh Water	Sprinkle Pill	Hook STW Inlet PS low level CSO	81	347	100
Dwr Cymru Welsh Water	Nant Hafren	EGLWYSWRW WWTW EGLWYSWRW NR NWPRT	16	340	100
Dwr Cymru Welsh Water	River Dulas	Newchapel STW CSO	59	322	99
Dwr Cymru Welsh Water	Lower Town Harbour, Fishguard	Fishguard Lower Town SPS	75	277	100
Dwr Cymru Welsh Water	Beggars Reach Daugleddau	LLANGWM WWTW LLANGWM PEMBROKESHIRE	26	257	99.9
Dwr Cymru Welsh Water	River Anghof	PUNCHESTON Wastewater Treatment Works	13	245	100
Dwr Cymru Welsh Water	Esturial Waters At Rath	M'Ford Haven Rath CSO Milford Haven	111	231	99.1
Dwr Cymru Welsh Water	Western Cleddau	CSO 7 Union Hill, Haverfordwest	100	231	96
Dwr Cymru Welsh Water	Westfield Pill	CSO at Rosemarket STW	74	213	100
Dwr Cymru Welsh Water	Milford Haven	NEYLAND P.S. . .	40	177	99.9
Dwr Cymru Welsh Water	Castle Pill	M.Haven/Castle Pill CSO Pembs	80	171	100
Dwr Cymru Welsh Water	Little Haven Stream	LITTLE HAVEN SPS HEAD OF BEACH LIT	16	168	95.8
Dwr Cymru Welsh Water	Pont Shan Brook	CLYNDERWEN STW	41	163	33.1
Dwr Cymru Welsh Water	Merlin'S Brook	Johnston Terminal SPS	43	159	100
Dwr Cymru Welsh Water	Milford Haven Waterway	NEYLAND WWTW NEYLAND PEMBROKESHIRE	56	143	99.9
Dwr Cymru Welsh Water	Esturial Waters At Hakin Point	MILFORD HAVEN CSO	74	141	99.7
Dwr Cymru Welsh Water	Western Cleddau	NORTHGATE/FRED REES CSO HVRFORDWEST	61	133	100
Dwr Cymru Welsh Water	Milford Haven	PROMENADE NEYLAND SWO	64	130	96
Dwr Cymru Welsh Water	River Anghof	Storm Overflow at Wolfscastle Wastewater Treatment Works	26	95	100
Dwr Cymru Welsh Water	Castle Pill	A COMBINED SEWER OVERFLOW AT BEACH	67	85	99.9
Dwr Cymru Welsh Water	Esturail Waters Milford Haven	MILFORD HAVEN STW	50	73	99.9
Dwr Cymru Welsh Water	Fishguard Harbour	Fishguard Ogof Martha SPS	54	68	100
Dwr Cymru Welsh Water	Tidal Waters Of Western Cleddau	New Quay CSO New Quay Haverfordwest	53	65	100
Dwr Cymru Welsh Water	Goodwick Brook	CSO at Emergent Culvert Goodwick	38	56	99.5
Dwr Cymru Welsh Water	Swanswell Brook	BROADHAVEN SOUTH PS BROADHAVEN ,	21	53	99.3
Dwr Cymru Welsh Water	River Alun	PIT ST ST. DAVIDS SWO	33	35	95.6
Dwr Cymru Welsh Water	Sprincle Pill,Daucleddau	HOOK WwTW	9	34	100
Dwr Cymru Welsh Water	Aberach Stream	CSO at St Nicholas STW	36	30	92.2
Dwr Cymru Welsh Water	River Hubberston Pill	PRIORY PS	16	29	99.9
Dwr Cymru Welsh Water	Swanswell Brook	BROADHAVEN NORTH PUMPING STATION	23	24	98.5
Dwr Cymru Welsh Water	Brandy Brook	NEWGALE SEWAGE TREATMENT WORKS	6	19	100
Dwr Cymru Welsh Water	Western Cleddau	Castlemorris Wastewater Treatment CSO	9	17	100
Dwr Cymru Welsh Water	River Alun	PEBBLES ST. DAVIDS SWO	8	13	1.9
Dwr Cymru Welsh Water	Westfield Pill	Honeyborough SPS CSO	5	11	100
Dwr Cymru Welsh Water	Milford Haven Estuary	NEYLAND PROMENADE CSO , ,	16	5	100
Dwr Cymru Welsh Water	Westfeild Pill	Gaddarn Reach SPS CSO	4	4	99.9
Dwr Cymru Welsh Water	River Teifi	ST.DOGMAELS JEWSONS CSO MAIN CSO EO	4	4	100
Dwr Cymru Welsh Water	River Alun	VIC'GE RD ST.DAVIDS.SWO	3	2	44.2
Dwr Cymru Welsh Water	River Plysgog	PENRALLTDRAW COMBINED SEWER CSO	3	2	100
Dwr Cymru Welsh Water	Cwm Mawr Strea	PENYCWM PS	3	1	99.6
Dwr Cymru Welsh Water	River Teifi	St Dogmaels CSO	1	0	92.4
Dwr Cymru Welsh Water	River Teifi	CILGERRAN STW	1	0	100
Dwr Cymru Welsh Water	Fishguard Harbour	FISHGUARD HARBOUR (CRANE) CSO	0	0	100
Dwr Cymru Welsh Water	Western Cleddau	MATHRY SPS NR FISHGUARD PEMBROKSHRE	0	0	100
Dwr Cymru Welsh Water	Porthgain Stream	CROESGOCH WORKS INLET	0	0	100
Dwr Cymru Welsh Water	Unnamed Of Brandy Brook	Maes Ffynnon SPS CSO	0	0	100
Dwr Cymru Welsh Water	Westfield Pill Via Unnamed Watercourse	Houghton SPS CSO	0	0	99.2
Dwr Cymru Welsh Water	River Nyfer	The Parrog Newport CSO	0	0	0
Dwr Cymru Welsh Water	Pont Shan Brook	CLYNDERWEN WWTW INLET CSO	0	0	0
Dwr Cymru Welsh Water	Brandy Brook	NEWGALE SEWAGE TREATMENT WORKS	0	0	99.9
Dwr Cymru Welsh Water	Milford Haven Estuary	Nelson Quay SPS CSO	0	0	99.9
Dwr Cymru Welsh Water	St Martins Brook	Haverfordwest Hawthorn Rise CSO	0	0	100
Dwr Cymru Welsh Water	Cartlett Brook	Crundale Sewage Pumping Station	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. This 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

With generous support from:

Media Queries

Get in touch if you have queries or want to discuss our data.

press [at] top-of-the-poops.org

Please Support Us

We rely on donations to fund our work. Please support us if you can