Truro and Falmouth was polluted by sewage 2,483 times in 2024
lasting 25,701 hours - that's 2.97 years!
- but monitoring was disabled in some locations, so could be more

Constituency

Select the constituency from the drop-down

✔ means we have experimental daily data since 2023

Live data for Truro and Falmouth in 2025

So far this year (as of Apr 16, 2025, 6:15 PM) there has been 9,633 hours of sewage overflows - that's 1.11 years!

Totals for Truro and Falmouth in 2024

55 Sites polluted by South West Water

2,483 sewage dumps
25,701 h duration

That's 2.97 years! On average 6.8 times a day

Change Over Time

Take Action

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Constituencies near Truro and Falmouth

Waterways in Truro and Falmouth

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Truro and Falmouth, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

Monitoring Online Monitoring Offline Polluting Potentially Polluting Unknown

Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2024

Here are all the reported sewage overflow totals for Truro and Falmouth 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 72 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
South West Water	River Kennal	PONSANOOTH STW SSO	171	3,687	99.5
South West Water	Unknown	CHACEWATER STW	183	3,257	86.65
South West Water	Bolingey Stream	GOONHAVERN WWTW	186	2,748	92.1
South West Water	River Kennall	39 ST MICHAELS COMBINED SEWER OF	172	2,693	97.1
South West Water	River Fal	GRAMPOUND ROAD PUMPING STATION	144	2,638	100
South West Water	Mylor Creek	MYLOR BRIDGE WWTW	145	2,075	100
South West Water	Penryn River	COMMERCIAL ROAD PUMPING STATION	96	1,274	100
South West Water	Falmouth Bay/ Bickland Wat	SWANVALE PUMPING STATION	77	1,243	100
South West Water	Tresillian River Estuary	LADOCK VALLEY STW	76	890	100
South West Water	Benny Stream	MITCHELL PUMPING STATION	69	810	100
South West Water	Truro River Estuary	TRURO (NEWHAM) STW	57	706	100
South West Water	Praze Stream	PRAZE TANK CSO	61	576	100
South West Water	Atlantic Ocean	GORRAN HAVEN PSCSO/EO	76	487	100
South West Water	Penryn River	FALMOUTH STW INLET & STORM PS	31	417	100
South West Water	Penryn River	FLUSHING PUMPING STATION	53	347	100
South West Water	Mylor Creek	MYLOR BRIDGE PSCSO/EO	30	294	100
South West Water	Pill Creek	LOWER TREVILLA PUMPING STATION	23	284	100
South West Water	Penryn River	CSO IN HIGH STREET	92	250	100
South West Water	Carnon River	QUENCHWELL PUMPING STATION	16	115	98.8
South West Water	River Gannel	ST NEWLYN EAST WWTW	90	102	100
South West Water	Carnon River	CARNON DOWNS WWTW	8	100	100
South West Water	Penryn River	CSO OFF PENDARVES ROAD	60	93	81
South West Water	Penryn River	OLD HILL PS	12	75	92.2
South West Water	River Kenwyn[S]	ROBERTS OPE CSO	51	72	100
South West Water	Penryn River	CSO AT KILLIGREW STREET	51	57	99.5
South West Water	Penryn River	WEBBER STREET CSO	67	43	100
South West Water	Carrick Roads	ST MAWES NO.1 PS	51	43	100
South West Water	River Fal	TREGONY BRIDGE PUMPING STATION	6	40	100
South West Water	Penryn River	CSO AT NORTH PARADE	42	40	100
South West Water	Penryn River	CSO AT DUNSTANVILLE TERRACE	41	35	100
South West Water	Unknown	BLACKWATER STW	33	27	100
South West Water	Freshwater	BOSVIGO LANE CSO	2	25	100
South West Water	Penryn River	ST THOMAS STREET CSO	28	23	97.3
South West Water	River Kenwyn	VICTORIA SQUARE CSO	33	23	99.4
South West Water	Pencabe Drang	PORTSCATHO SEWAGE TREATMENT WORKS	17	20	100
South West Water	River Allen	TRELANDER HIGHWAY CSO	31	16	100
South West Water	Truro River	NEWHAM ROAD PUMPING STATION	13	10	100
South West Water	Crantock Beach	CRANTOCK (BEACH ROAD) SPS	7	8	100
South West Water	River Allen	OLD BRIDGE STREET CAR PARK CSO	8	6	100
South West Water	River Carnon Estuary	DEVORAN PUMPING STATION	3	5	100
South West Water	River Kenwyn	EDWARD STREET CSO	3	4	98.3
South West Water	Falmouth Bay	QUEEN MARY GARDENS PUMPING STATION	12	4	87.6
South West Water	Penryn River	GROVE PLACE NO.1 CSO	10	3	100
South West Water	River Kenwyn	HENDRA ROAD CSO	21	3	100
South West Water	River Tinney	CALENICK PUMPING STATION	2	3	100
South West Water	Carne Stream	VERYAN STW	4	1	98.8
South West Water	Porth Joke	RUZZA PUMPING STATION	2	1	100
South West Water	Truro River	MORLAIX AVENUE (FYFFES SLIPWAY) CSO	4	1	100
South West Water	River Allen	PAULS TERRACE CSO	4	0	100
South West Water	River Allen Via Sws	ST CLEMENT'S HILL CSO	2	0	98.4
South West Water	Penryn River	TEHIDY TERRACE CSO	2	0	100
South West Water	Swanpool	SWANPOOL PSCSO/EO	1	0	100
South West Water	River Kenwyn	FAIRMANTLE STREET CSO	1	0	100
South West Water	River Kenwyn	ST GEORGES ROAD (REAR OF NO16) CSO	1	0	96.2
South West Water	River Kenwyn	LEMON MEWS CSO	2	0	100
South West Water	Portmellon Stream	GORRAN CHURCHTOWN PUMPING STATION	0	0	100
South West Water	Penryn River	PRINCE OF WALES PUMPING STATION	0	0	100
South West Water	River Kenwyn Via Sws	TABERNACLE STREET CSO	0	0	100
South West Water	Maenporth Stream	PENNANCE MILL TIDAL TANKS CSO	0	0	100
South West Water	Tresillian River Estuary	BOAT YARD PS CSO/EO	0	0	100
South West Water	Stream	ELLENGLAZE PSCSO/EO	0	0	100
South West Water	Penryn River	CSO AT MARKET STREET	0	0	100
South West Water	River Kenwyn	CASTLE STREET CSO	0	0	89.5
South West Water	River Kenwyn Via Sws	KING STREET CSO	0	0	96.6
South West Water	English Channel	PORTLOE WASTEWATER TREATMENT WORKS	0	0	99.2
South West Water	Penryn River	OLD HILL (TRESAWLE RD) CSO	0	0	100
South West Water	River Kenwyn Via Sws	CALENICK STREET CSO	0	0	98.3
South West Water	Unknown	VICTORIA QUAY PSCSO/EO	0	0	100
South West Water	Truro River Estuary System	VICTORIA LODGE PS CSO/EO	0	0	100
South West Water	River Allen	CAMPFIELD HILL CSO	0	0	86.2
South West Water	River Kenwyn	FRANCES STREET CSO TRURO	0	0	100
South West Water	Kenwyn River	O/S 8 CALLENICK STREET CSO	0	0	0

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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