Cornwall sewage map
Where are sewage spills happening in Cornwall right now — and is it safe to swim? This live map tracks 604 storm overflows alongside beach water-quality risk.
What this map shows
Glanmor plots every monitored South West Water storm overflow in Cornwall and combines it with Environment Agency bathing-water data, rainfall and tides to give each beach a simple risk rating. When an overflow discharges near a beach — especially after heavy rain — that beach turns amber or red. You can open the full interactive map with spill, news and pollution-report layers, browse all spill locations, or see the worst polluters.
Cornwall beach status today
RED Kingsand, Trebarwith Strand
AMBER Gyllyngvase, Maenporth, Swanpool
Updated 22 min ago. See how ratings are calculated.
Frequently asked questions
How many storm overflows are there in Cornwall?
South West Water operates 604 monitored storm overflows in Cornwall — all shown on the map above.
How many sewage spills happened in Cornwall in 2025?
EA Event Duration Monitoring recorded 13,180 storm-overflow spills across Cornwall in 2025.
Is it safe to swim in Cornwall today?
Check the live status above. Ratings combine recent overflows, rainfall and official samples — guidance only, so also check official alerts and use your judgement.
Seen pollution, or got ill after a swim?
Help build the picture — it takes a minute and no account is needed.
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