Top of the Poops | Constituency | Caerphilly| Polluted by Dwr Cymru Welsh Water

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✔ means we have experimental daily data since 2023

Totals for Caerphilly in 2024

36 Sites polluted by Dwr Cymru Welsh Water

1,819 sewage dumps

9,496 hours duration

That's 1.1 years! On average 5 times a day

Change Over Time

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Constituencies near Caerphilly

Waterways in Caerphilly

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Pollution Summary 2024

Here are all the reported sewage overflow totals for Caerphilly in 2024. 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 42 CSO locations had reporting enabled for less than half the year.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Sirhowy River	CSO 20 OLD MILL NEWPORT ROAD	148	1,392	99.8
Dwr Cymru Welsh Water	Porset Brook	CSO at Lansbury Park Estate	139	1,334	91.9
Dwr Cymru Welsh Water	River Rhymney	CWM LAS CSO	115	1,149	98.2
Dwr Cymru Welsh Water	River Rhymney	CSO at Glan-yr-Afon Nursing Home No2, Pengam	119	1,138	87.4
Dwr Cymru Welsh Water	River Sirhowy	Springfield Est CSO, Pontllanfraith	112	882	96.7
Dwr Cymru Welsh Water	River Rhymney	Tredomen AFC CSO, Ystrad Mynach	95	824	99.8
Dwr Cymru Welsh Water	Nant Y Aber	Combined Sewer Overflow at Bryn Siriol	81	361	80.8
Dwr Cymru Welsh Water	River Rhymney	CSO at Glan-yr-Afon Nursing Home 1	93	320	99
Dwr Cymru Welsh Water	River Sirhowy	Bottom of Nine Mile Point Colliery CSO	30	235	98.5
Dwr Cymru Welsh Water	River Rhymney	Tir-y-Berth behind William St	67	197	98.5
Dwr Cymru Welsh Water	River Sirhowy	Old Tram Rd CSO, Pontllanfraith	55	163	95.5
Dwr Cymru Welsh Water	River Rhymney	Forge Engineering CSO, Bedwas	41	150	99.4
Dwr Cymru Welsh Water	River Rymney	MAESYCWMMER A472 JUNCTION CSO	55	145	73.7
Dwr Cymru Welsh Water	River Rhymney	A CSO AT YSTRAD MYNACH BRIDGE	82	137	97.3
Dwr Cymru Welsh Water	River Rhymney	TRELYN LANE CSO FLEUR-DE-LIS	33	125	86.8
Dwr Cymru Welsh Water	Nant Cylla	Oaks End Close CSO	46	124	90
Dwr Cymru Welsh Water	River Rhymney	CSO at Pengham High St near Bridge	56	121	99.1
Dwr Cymru Welsh Water	Sirhowy River	WVTS-WYLLIE HALT SSO	32	102	97.8
Dwr Cymru Welsh Water	Nant Yr Aber	Crossways Retail Park CSO	29	99	98.3
Dwr Cymru Welsh Water	Sirhowy River	WVTS - Wattsville (Recreation Ground) CSO	47	87	93.1
Dwr Cymru Welsh Water	Sirhowy River	CSO 19 Gryphonn Concrete Products	84	85	99.8
Dwr Cymru Welsh Water	River Rhymney	BEDWAS SUNNYBANK FARM CSO	19	67	31.4
Dwr Cymru Welsh Water	River Rhymney	Newport Rd CSO, Trethomas	25	56	98.8
Dwr Cymru Welsh Water	Nant Yr Aber	CSO Rear Commerc'l St Senghenydd	36	54	99.8
Dwr Cymru Welsh Water	River Rhymney	CSO ASSET NO 90411 PENGAM	47	36	96.9
Dwr Cymru Welsh Water	River Rhymney	Asset No. 32207 Celtic Steel Factory CSO	22	29	89
Dwr Cymru Welsh Water	River Rhymney	High St CSO, Glan-y-Nant	20	19	99.8
Dwr Cymru Welsh Water	River Rhymney	Forge Rd CSO, Machen	21	16	99.3
Dwr Cymru Welsh Water	Nant Yr Aber	Graig-Y-Fedw CSO	26	16	98.8
Dwr Cymru Welsh Water	Nant Cwm-Parc	64 Commercial Streetreet CSO, Senghenydd	16	8	98.5
Dwr Cymru Welsh Water	Nant Yr Aber	Windsor Place Senghenydd CSO	9	4	99.7
Dwr Cymru Welsh Water	Rhymney R - Nant Bargod Rhymni To Conf Nant Cyl	Fleur-de-Lys - Rear of Glanddu CSO	5	4	98.9
Dwr Cymru Welsh Water	River Sirhowy	Islwyn Rd CSO, Crosskeys	9	2	98.9
Dwr Cymru Welsh Water	River Rhymney	CSO at Trelyn Park	2	1	99.3
Dwr Cymru Welsh Water	Rhymney River	Old Prince Albert Hotel CSO, Hengoed	2	0	99.7
Dwr Cymru Welsh Water	Nant-Yr-Aber	86 Nantgarw Rd CSO	1	0	92.3
Dwr Cymru Welsh Water	River Rhymney	OLD PRINCE ALBERT HOTEL HENGOED	0	0	99.7
Dwr Cymru Welsh Water	River Rhymney	COMBINED SEWER OVERFLOW SERVING	0	0	57
Dwr Cymru Welsh Water	Nant Yr Aber	Abertridwr Coed Cae Road 1 CSO	0	0	99.4
Dwr Cymru Welsh Water	Nant Caeach	Combined Sewer Overflow at Rear of 33 Church Street	0	0	99.4
Dwr Cymru Welsh Water	River Rhymney	Rear of Williams St CSO	0	0	99.7
Dwr Cymru Welsh Water	River Sirhowy	Railway Cottages CSO, Cwmfelinfach	0	0	69.3

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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(C) 2020-2024 Top-Of-The-Poops CC-BY-SA 4.0,
(C) Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2024,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis (C) 2024 Top-Of-The-Poops

Caerphilly Polluted by sewage 1,819 times in 2024 lasting 9,496 hours - That's 1.1 years! Monitoring fell below 50% in some locations so could be more

Caerphilly