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St Ives

Polluted by sewage 1,462 times in 2025 lasting 11,887 hours - That's 1.38 years!

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Live data for St Ives in 2026

So far this year (as of 18 May 2026, 12:00) there has been 15,309 hours of sewage overflows, from 94 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s - that's 1.77 years!

Totals for St Ives in 2025

44 Sites polluted by South West Water
1,462 sewage dumps
11,887 hours duration
That's 1.38 years. On average 4 times a day

Change Over Time

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Pollution Summary 2025

Here are all the reported sewage overflow totals for St Ives 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
South West Water Unknown PRAZE AN BEEBLE STW 147 3,152 100
South West Water Atlantic / Porth Nanven Stream COT VALLEY PUMPING STATION 100 2,056 100
South West Water Stream BOJEWYAN PSCSO/EO 47 872 100
South West Water English Channel THE LIZARD PUMPING STATION 54 693 99.9
South West Water Ludgvan Stream LUDGVAN SCHOOL CSO 47 568 100
South West Water Unknown PERRANUTHNOE PUMPING STATION 50 565 100
South West Water Atlantic HAYLE SEWAGE TREATMENT WORKS 49 474 100
South West Water Atlantic Ocean, Off Porthcurno PORTHCURNO VALLEY PUMPING STATION 24 394 100
South West Water River Cober HELSTON WWTW 32 340 97.4
South West Water Surface Water Drain To Chyandr BOLITHO ROAD CSO 106 329 99.5
South West Water Trevedran Stream ST BURYAN WWTW 36 311 100
South West Water Tregaseal Stream ST JUST (TREGASEAL 1) SSO 18 274 100
South West Water English Channel HELLARCHER PUMPING STATION 74 245 100
South West Water Atlantic Ocean,Off Sennen Cove SENNEN COVE PUMPING STATION 21 223 99.2
South West Water Unknown ST KEVERNE STW 22 143 100
South West Water Atlantic Ocean Coastal GEEVOR MINE PUMPING STATION 31 129 100
South West Water Longrock Stream GLADSTONE TERRACE NORTH 23 124 100
South West Water Atantic Ocean LOWER BOSCASWELL CSO 72 119 100
South West Water Atlantic / Porth Nanven Stream BOSORNE ROAD SEWER OVERFLOW 56 100 99.2
South West Water Coverack Cove COVERACK MILL PS 24 99 98.6
South West Water Local Stream FINNS CSO 52 97 100
South West Water Church Cove CHURCH COVE ROAD PS 13 91 100
South West Water English Channel CADGWITH NEW ROAD PSCSO/EO 10 66 100
South West Water River Cober Via Sws COINAGEHALL STREET CSO 61 66 81.5
South West Water Atlantic Ocean BOTALLACK PUMPING STATION 37 63 100
South West Water Mounts Bay PORTHLEVEN HARBOUR ATTENUATION 13 53 100
South West Water Atlantic Ocean CSO AT ATLANTIC HOTEL 60 52 100
South West Water Local Stream NANCHERROW HILL CSO 30 49 93.5
South West Water Atlantic Ocean BOSWEDDEN PUMPING STATION 8 22 100
South West Water Mounts Bay MOUSEHOLE PUMPING STATION 31 22 100
South West Water Local Stream OUTSIDE 5 TREVARRACK LANE CSO 48 20 100
South West Water Polurrian Cove MULLION TRANSFER PS 9 11 100
South West Water English Channel LAFLOUDER LANE PUMPING STATION 1 9 100
South West Water Stream GOLDSITHNEY PSCSO/EO 4 8 100
South West Water St Ives Bay Atlantic Ocean PORTHMINSTER POINT 1 EO 6 7 99.9
South West Water Mounts Bay English Channel MOUSEHOLE HARBOUR (SOUTH SLIP) CSO 17 7 100
South West Water St Ives Bay BAMALUZ POINT STORM WATER & EO 3 4 100
South West Water Mounts Bay LONGROCK INDUSTRIAL ESTATE 6 3 100
South West Water St Ives Bay WESCOTS QUAY CSO 6 1 98.5
South West Water Coverack Cove COVERACK HARBOUR PSEO/CSO 7 1 99.2
South West Water River Cober HELSTON MARKET PUMPING STATION 3 1 100
South West Water Mounts Bay ALBERT PIER PUMPING STATION 1 0 100
South West Water Porthallow Stream PORTHALLOW SEWAGE PUMPING STATION 1 0 100
South West Water River Cober GRANGE ROAD CSO 2 0 100
South West Water Mounts Bay, English Channel BREAGESIDE PUMPING STATION (PORTHLE 0 0 100
South West Water Red River CROWLAS BRIDGE PUMPING STATION 0 0 100
South West Water River Cober Via Sws MONUMENT ROAD CSO 0 0 100
South West Water Helford Creek SHIPWRIGHTS PUMPING STATION 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. Live sewage data from Stream Water API

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.

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