Carmarthen East and Dinefwr was polluted by sewage 9,308 times in 2023
lasting 97,252 hours - that's 11.26 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 Carmarthen East and Dinefwr in 2023

109 Sites polluted by Dwr Cymru Welsh Water

9,308 sewage dumps
97,252 h duration

That's 11.26 years! On average 25.5 times a day

Change Over Time

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Constituencies near Carmarthen East and Dinefwr

Waterways in Carmarthen East and Dinefwr

Pollution Summary 2023

Here are all the reported sewage overflow totals for Carmarthen East and Dinefwr 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 4 of the total 117 CSO locations had reporting enabled for less than half the year, of which 4 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Marlais	CSO 6 NR BRYN MARLAIS FARM	250	4,543	99.8
Dwr Cymru Welsh Water	River Tyweli	PENCADER STW STORM TANKS	177	3,938	99.9
Dwr Cymru Welsh Water	River Sannan	LLANFYNYDD STW	233	3,362	100
Dwr Cymru Welsh Water	River Lash	PENYGROES WWTW SSO PONTLASH	203	3,255	100
Dwr Cymru Welsh Water	River Marlas	Settled Storm Overflow at Carmel Wastewater Treatment Works	165	3,052	84.5
Dwr Cymru Welsh Water	River Loughor	CSO 14/43 PONT Y CLERC Rd AMMANFORD	170	2,962	100
Dwr Cymru Welsh Water	River Teifi	CSO at Pentrecwrt STW	288	2,771	99.9
Dwr Cymru Welsh Water	River Teifi	RHYDFACH PS	132	2,758	93.1
Dwr Cymru Welsh Water	River Towy	CSO at FFAIRFACH STW	174	2,717	100
Dwr Cymru Welsh Water	River Gwendraeth Fach	LLANDDAROG WWTW LLANDDAROG CARMARTH	128	2,654	99.9
Dwr Cymru Welsh Water	Marlais	BRECHFA STW - EMERGENCY DISCHA	158	2,502	100
Dwr Cymru Welsh Water	River Marlas	McKays Crossing CSO	144	2,302	98.7
Dwr Cymru Welsh Water	River Myddyfi	SALEM STW Settled Storm	160	2,298	99.9
Dwr Cymru Welsh Water	River Bran	LLANDOVERY WASTEWATER TREATMENT	116	2,290	99.9
Dwr Cymru Welsh Water	River Gwenlais	Storm Overflow at Cilycwm Wastewater Treatment Works	312	2,134	100
Dwr Cymru Welsh Water	River Cothi	PONT-AR-GOTHI & NANTGAREDIG WWTW	103	2,047	100
Dwr Cymru Welsh Water	River Amman	CSO 33 5M DOWNSTREAM OF PIPE BRIDGE	145	1,940	100
Dwr Cymru Welsh Water	Nant Cwm Croes Y Ceiliog	IDOLE CWMFFRWD SEWERAGE SCHEME	115	1,791	99.8
Dwr Cymru Welsh Water	River Tywi	Ashfield Road P.S. Ashfield Llangado	97	1,772	99
Dwr Cymru Welsh Water	River Twrch	GEORGE IV CSO 23 UPPER CWMTWRCH	112	1,675	100
Dwr Cymru Welsh Water	River Marlais	CSO 4 Manhole 225A Adj 3 Rawlings	81	1,589	99.7
Dwr Cymru Welsh Water	Nant Rhydian-Ddu	Porthyrhyd PS	112	1,583	99.8
Dwr Cymru Welsh Water	River Mamog River Cych	CAPEL IWAN STW	88	1,575	100
Dwr Cymru Welsh Water	Ferryside Stream	FERRYSIDE STW FERRYSIDE CARMS	124	1,533	93
Dwr Cymru Welsh Water	River Teifi	CENARTH PS	126	1,518	100
Dwr Cymru Welsh Water	Llansaint Stream	LLANSAINT WWTW LLANSAINT FERRYSIDE	99	1,411	100
Dwr Cymru Welsh Water	River Marlais	29 Aberlash Rd CSO, Llandybie	87	1,386	99.9
Dwr Cymru Welsh Water	River Y Bantwen	Settled Storm Overflow at Llanddarog Wastewater Treatment Works	64	1,383	100
Dwr Cymru Welsh Water	River Sawdde	LLANGADOG STW	128	1,358	100
Dwr Cymru Welsh Water	River Bran	LLANDOVERY WASTEWATER TREATMENT	89	1,313	99.8
Dwr Cymru Welsh Water	River Gwili	100M D/S R'DBR CWMGWILI (CSO) CARMS	122	1,226	100
Dwr Cymru Welsh Water	River Bargoed	Llysnewydd SPS	55	1,210	99.9
Dwr Cymru Welsh Water	River Amman	CSO Near 11 Upper Station Rd	115	1,193	100
Dwr Cymru Welsh Water	River Teifi	Emlyn Arms CSO Newcastle Emlyn	241	1,147	98.6
Dwr Cymru Welsh Water	River Loughor	CSO 16 PANTYFFYNON RAILWAY BRIDGE	113	1,143	100
Dwr Cymru Welsh Water	River Dulias	MYNNYDD CERRIG PUMPING STATION	99	1,080	98.3
Dwr Cymru Welsh Water	River Amman	CSO 28 AT MANHOLE 89 NR AMMAN RFC	105	1,078	98.4
Dwr Cymru Welsh Water	River Tywi	CSO at Cwm Ifor STW Storm Tanks Manordei	57	1,050	100
Dwr Cymru Welsh Water	River Teify	CSO and SPS at LLANBYTHER (MANHOLE 7 )EMERGEN	83	995	86.4
Dwr Cymru Welsh Water	River Tywi	Llansadwrn SPS	68	928	99.9
Dwr Cymru Welsh Water	Cloidach	CSO at Felingwm Wastewater Treatment Works	107	861	100
Dwr Cymru Welsh Water	Nant Y Ci	CSO 9 10 METRES DOWNSTREAM - BRIDGE	115	850	99.9
Dwr Cymru Welsh Water	River Ddu	TALLEY WWTW INLET PUMPING STATION	76	848	100
Dwr Cymru Welsh Water	River Bantwen	LLANDDAROG PS EO CWMISFAEL CARMS	86	824	99.9
Dwr Cymru Welsh Water	Unnamed Stream	Ty Hen Rhos PS	69	725	100
Dwr Cymru Welsh Water	River Cothi	PONTARGOTHI P.S.EMERG.	47	717	99.8
Dwr Cymru Welsh Water	Nant Alltwalis	ALLTWALIS PS	65	695	99.9
Dwr Cymru Welsh Water	River Amman	CS0 34 100M DOWNSTREAM OF BRIDGE	75	680	99.9
Dwr Cymru Welsh Water	River Teifi Via An Un-	Llanybydder CSO	114	619	89.9
Dwr Cymru Welsh Water	Un To River Bran	Myddfai Village Sewerage Scheme CSO	178	613	100
Dwr Cymru Welsh Water	River Cothi	Pont-ar-Gothi & Nantgaredig Wastewater Treatment Works	30	563	100
Dwr Cymru Welsh Water	River Cennen	Primary School CSO Ffairfach	105	555	100
Dwr Cymru Welsh Water	Gwendraeth Fawr	SOC4 PONTYATES AREA CSO	72	555	99.8
Dwr Cymru Welsh Water	River Amman	CSO 37, Manhole 24B, Betws Rd Bridge	99	534	99.1
Dwr Cymru Welsh Water	Nant Y Wrach	CAERBRYN R'D CSO PENYGROES CARMS	81	475	100
Dwr Cymru Welsh Water	Gwendraeth Fawr	Parc Y Dai No1 CSO Drefach	112	452	98.6
Dwr Cymru Welsh Water	River Loughor	Penybanc Rd 2 CSO	93	385	99.7
Dwr Cymru Welsh Water	River Gwili	Abergwili SPS	55	383	43.2
Dwr Cymru Welsh Water	River Bran	Llandovery No1 SPS	129	337	100
Dwr Cymru Welsh Water	River Brake	Albion SPS	128	325	99.9
Dwr Cymru Welsh Water	Gwendraeth Fach	Pencader Bridge CSO	48	321	100
Dwr Cymru Welsh Water	River Tywelli	Pencader SPS	48	316	100
Dwr Cymru Welsh Water	Loughor - Conf With Marlais To Conf With Aman	Nant Arw CSO, Capel Hendre	73	315	99.9
Dwr Cymru Welsh Water	Ferryside Stream	FERRYSIDE PS . .	47	296	99.9
Dwr Cymru Welsh Water	River Amman	CSO 36 Manhole 31c Opp Bettws Pk	128	295	99.4
Dwr Cymru Welsh Water	River Bran	CYNGHORDY WWTW INLET STORM OVERFLOW	80	287	99.9
Dwr Cymru Welsh Water	Nant Gurrey Fach	Sawmills Y'd CSO Llandeilo Carmarthen	64	287	95.9
Dwr Cymru Welsh Water	River Tywi	LLANDEILO CSO	119	287	99.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	BLAENHIRWAUN CSO CEFNEITHIN	41	286	100
Dwr Cymru Welsh Water	River Gorlech	ABERGORLECH SPS	20	282	100
Dwr Cymru Welsh Water	River Teifi	Cwmann SPS	144	279	99.9
Dwr Cymru Welsh Water	River Teifi	WILKES HEAD CSO LLANDYSUL CERED'N	24	237	100
Dwr Cymru Welsh Water	Gwendraeth Fawr	CSO at Cwm Mawr Rb No1 Gwendreath Catchmen	45	222	100
Dwr Cymru Welsh Water	Unknown Of River Towy	Carmarthen - Sticle Path	80	222	99.2
Dwr Cymru Welsh Water	River Towy	Golden Grove WwTW Inlet CSO Llandie	91	219	100
Dwr Cymru Welsh Water	Nant Wthan	Saron - A484 O.S. Maesgeler	38	211	62.3
Dwr Cymru Welsh Water	Gwendraeth Fawr	Tom Jones Nursery CSO	51	207	99.6
Dwr Cymru Welsh Water	Gwendraeth Fawr	Parc y Dai CSO	65	196	97.9
Dwr Cymru Welsh Water	River Twrch	FARMERS STW	19	192	12.3
Dwr Cymru Welsh Water	River Dulas	CWRT HENRI WWTW INLET STORM OVERFLW	56	183	100
Dwr Cymru Welsh Water	River Marlais	Llandybie RFC CSO	58	174	100
Dwr Cymru Welsh Water	Gwendraeth Fach	Settled Storm Overflow at Llangyndeyrn Wastewater Treatment Works	28	162	100
Dwr Cymru Welsh Water	Gwendraeth Fawr	HEOL MEINCIAU CSO	36	154	99.9
Dwr Cymru Welsh Water	River Amman	CSO 21 NR FORGE WASHERY BRYNAMMAN	70	147	99.4
Dwr Cymru Welsh Water	River Amman	CSO 38 500 M UP/STRM CONF LOUGHER	74	146	99.9
Dwr Cymru Welsh Water	Nant Llynfell	Swo No 11 Nr Glanyrafon Cwmlly CSO	25	132	51
Dwr Cymru Welsh Water	River Bran	FELIN FRAN PS LLANGADOG ,	14	105	100
Dwr Cymru Welsh Water	River Towy	Llandeilo Yscubor Abad CSOs	81	82	99.8
Dwr Cymru Welsh Water	Nant Harri	Rhosmaen PS	43	77	98.9
Dwr Cymru Welsh Water	River Amman	Station Road CSO, Brynamman	50	73	99.9
Dwr Cymru Welsh Water	River Amman	CSO 23 Manhole 125B Nr Brynbach FM	58	72	85.2
Dwr Cymru Welsh Water	River Amman	CSO 29 At Manhole 76c Nr Hospital	30	47	99.9
Dwr Cymru Welsh Water	Gwendraeth Fach	Llanddarog	12	41	78.3
Dwr Cymru Welsh Water	River Twrch	CSO Felinfach Rd. Ystradowen.	5	41	75.8
Dwr Cymru Welsh Water	River Lash	Gate Road Sewage Pumping Station Penygroes	18	36	100
Dwr Cymru Welsh Water	Nant Grenig	CSO 32 30M D/STRM A474 ROADBRIDGE	8	23	34.2
Dwr Cymru Welsh Water	River Teifi	CWMANN SPS(EMERG'Y) CWMANN LAMPETER	9	21	99.9
Dwr Cymru Welsh Water	Nant-Y-Ci	153 Saron Rd CSO	27	19	99.9
Dwr Cymru Welsh Water	Unnamed Utuary Of Gwendreath Fach	CSO at Llangynderyn PS into R Gwendraeth Fach	6	15	100
Dwr Cymru Welsh Water	River Amman	CSO 31 Manhole 72C Maesgrenig	16	13	54.4
Dwr Cymru Welsh Water	Gwendraeth Fawr	CARWAY WWTW CARWAY CARMS	32	9	94.5
Dwr Cymru Welsh Water	Gwendraeth Fawr	Ddoll Las Temporary CSO Llanelli	6	7	100
Dwr Cymru Welsh Water	River Amman	CSO 19 HALL STREET BRYNAMMAN	9	5	99.9
Dwr Cymru Welsh Water	River Marlais	Llansawel WWTW Settled Storm	12	5	100
Dwr Cymru Welsh Water	Unnamed Utory Of River Sawdde	Llangadog Common CSO	17	4	99.9
Dwr Cymru Welsh Water	Gwendraeth Fawr	HEOL NAZARETH 2 CSO	2	1	100
Dwr Cymru Welsh Water	River Loughor	Old NCB Yard CSO, Penybanc	4	1	22.3
Dwr Cymru Welsh Water	River Duar	Llanybydder - Oriel Jones CSO	2	0	4.2
Dwr Cymru Welsh Water	Nant Arw	Capel Hendre Sewage Scheme CSO	1	0	99.9
Dwr Cymru Welsh Water	River Melinddwr	Llansawel Village CSO No2	0	0	96.1
Dwr Cymru Welsh Water	River Melinddwr	LLANSAWEL . .	0	0	0
Dwr Cymru Welsh Water	River Amman	Penpound Lane CSO	0	0	0
Dwr Cymru Welsh Water	Nant Crychiau	PENIEL PS PENIEL CARMARTHEN ,	0	0	0
Dwr Cymru Welsh Water	River Gwili	CWMGWILI WWTW CWMGWILI NR AMMANFORD	0	0	99.8
Dwr Cymru Welsh Water	Nant Gwenlais	Cilyrychen PS CSO	0	0	0
Dwr Cymru Welsh Water	River Gwili	CSO 50m D/S From Culvert Meadows R'd	0	0	100
Dwr Cymru Welsh Water	River Gwili	Cwmgwili WwTW Cwmgwili Nr Ammanford Settled Storm	0	0	99.9

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

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