Cornwall's worst polluters (2025)

Ranked by storm-overflow spills recorded in the EA's 2025 Event Duration Monitoring.

Beaches with most spills nearby (5 km)

#BeachSpills
1Gyllyngvase763
2Swanpool676
3Maenporth555
4Par Sands551
5Polkerris497
6Readymoney Cove479
7Kingsand387
8Sharrow375
9Tregonhawke375
10Penzance358
11Wherry Town358
12Long Rock337
13Marazion337
14Portreath336
15Cawsand331
16Millendreath331
17Trevone Bay317
18Harlyn Bay309
19East Looe304
20Seaton (Cornwall)270
21Crinnis Beach262
22Chapel Porth260
23Porthtowan260
24Gwynver233
25Downderry224

Spill counts are EA Event Duration Monitoring annual returns for 2025. Glanmor collects and collates water-quality and pollution data alongside citizen reports, to make what's happening in Cornwall's waters visible. It does not provide medical advice — if you are unwell, seek medical advice. Community-collected data may be incomplete or unverified.