Trevone Bay water quality

GREEN

designated bathing water · · South West Water

Trevone Bay is a designated bathing water in Cornwall, currently rated GREEN for swimming — No recent overflow, no pollution warning, low rainfall, no high samples. Its latest Environment Agency classification is excellent (2025), and 317 storm-overflow spills were recorded nearby in 2025. Below: live risk, recent spills, official samples, rainfall, tides and nearby reports.

Safe to swim right now?
Looking good right now
No recent overflow, no pollution warning, low rainfall, no high samples.
Do not rely solely on this website for health decisions. Check official alerts and use your own judgement. Seek medical advice if you are unwell.

Current status

Risk: GREEN No recent overflow, no pollution warning, low rainfall, no high samples.

  • Active overflows nearby: 0
  • Recent overflows (48h): 0
  • Rainfall (48h): 2.2 mm

Official EA classification

excellent (2025)

Latest official sample

2026-08-17 — E.coli 10, enterococci 10 cfu/100ml

Latest independent sample

None published

Pollution & environment data

2.2 mm
Rainfall 48h
8.8 mm
Rainfall 7d
9
Outfalls within 5 km
317
Spills (2025, official)
15
Spills 2026 so far (live)
2
Spills last 30d
rising 2.01m
Tide now

Recent storm overflows nearby (30 days)

In the news nearby

Storm-overflow spills near here, by year (EDM)

Recent spills near here (precise, SWW)

Full spill history near Trevone Bay

Download CSV

Every storm-overflow discharge Glanmor has recorded within 5 km of Trevone Bay, newest first.

15 discharge events
StartEndOutfallDistance
2026-08-14 19:302026-08-14 19:45TRIB OF LITTLE PETHERICK CREEK~4.3 km
2026-08-14 19:152026-08-14 19:24TRIB OF LITTLE PETHERICK CREEK~4.3 km
2026-07-18 15:442026-07-18 15:47RIVER CAMEL ESTUARY (E)~3.3 km
2026-07-18 14:452026-07-18 17:15RIVER CAMEL ESTUARY (E)~3.3 km
2026-07-16 00:292026-07-16 00:31CAMEL ESTUARY (E)~3.9 km
2026-07-01 09:002026-07-01 09:08TREVONE BAY~0.5 km
2026-06-25 09:482026-06-25 09:50CAMEL ESTUARY (E)~2.9 km
2026-06-25 09:092026-06-25 09:11CAMEL ESTUARY (E)~3.3 km
2026-06-18 09:032026-06-18 09:08RIVER CAMEL ESTUARY (E)~3.3 km
2026-06-18 08:452026-06-18 08:47TREYARNON STREAM~3.3 km
2026-06-17 07:262026-06-17 07:43MOTHER IVEYS BAY (C)~2.3 km
2026-06-17 06:542026-06-17 07:38TRIB OF LITTLE PETHERICK CREEK~4.3 km
2026-06-15 10:122026-06-15 10:13CAMEL ESTUARY (E)~3.9 km
2026-06-08 08:362026-06-08 08:37CAMEL ESTUARY (E)~4.6 km
2026-03-02 14:432026-03-03 01:13TREVONE BAY~0.5 km
26 precise spill records (duration & volume)
WhenDetailDistance
2026-08-14 19:15spill, 8 min~4.3 km
2026-07-18 15:44spill, 2 min~3.3 km
2026-07-18 14:43spill, 0 min~3.3 km
2026-07-18 14:36spill, 0 min~3.3 km
2026-07-16 00:29spill, 2 min~3.9 km
2026-07-01 09:00spill, 9 min~0.5 km
2026-06-25 09:48spill, 2 min~2.9 km
2026-06-25 09:48spill, 2 min~2.9 km
2026-06-25 09:09spill, 2 min~3.3 km
2026-06-25 09:09spill, 2 min~3.3 km
2026-06-18 09:03spill, 5 min~3.3 km
2026-06-18 09:03spill, 5 min~3.3 km
2026-06-18 08:45spill, 2 min~3.3 km
2026-06-18 08:45spill, 2 min~3.3 km
2026-06-17 07:26spill, 17 min~2.3 km
2026-06-17 07:26spill, 17 min~2.3 km
2026-06-17 06:54spill, 44 min~4.3 km
2026-06-17 06:54spill, 44 min~4.3 km
2026-06-15 10:12spill, 1 min~3.9 km
2026-06-15 10:12spill, 1 min~3.9 km
2026-06-08 08:36spill, 1 min~4.6 km
2026-06-08 08:36spill, 1 min~4.6 km
2026-03-03 12:25spill, 10 min~1.4 km
2026-03-03 12:25spill, 10 min~1.4 km
2026-03-02 14:43spill, 630 min~0.5 km
2026-03-02 14:43spill, 630 min~0.5 km
Take action — email SWW / your MPGot ill here? Build a reportReport pollution

Water quality — 7-year trend

Water quality in 2026 was broadly level with 2025.

YearEA classificationSamplesE. coli (geo-mean)Enterococci (geo-mean)High readings
2019—1215 cfu/100ml17 cfu/100ml0
2020—412 cfu/100ml13 cfu/100ml0
2021—2013 cfu/100ml16 cfu/100ml0
2022—2016 cfu/100ml18 cfu/100ml2 of 20
2023—2117 cfu/100ml16 cfu/100ml0
2024—2016 cfu/100ml15 cfu/100ml1 of 20
2025excellent2018 cfu/100ml18 cfu/100ml2 of 20
2026—1518 cfu/100ml18 cfu/100ml2 of 15

Geometric mean of Environment Agency samples per calendar year (the standard bathing-water statistic). "High readings" are samples at or above 500 E. coli or 200 enterococci cfu/100ml.

Trevone Bay — frequently asked questions

Is it safe to swim at Trevone Bay today?

Trevone Bay is currently rated GREEN: No recent overflow, no pollution warning, low rainfall, no high samples. This is guidance only — also check official alerts and use your judgement.

Has there been a sewage spill near Trevone Bay?

317 storm-overflow spills were recorded near Trevone Bay in 2025 (EA Event Duration Monitoring), and 15 spill events have been logged nearby so far this year.

What is Trevone Bay's bathing water classification?

Trevone Bay is classified excellent for 2025 by the Environment Agency.

Data & provenance

Last updated
36 min ago (2026-08-26 15:15 UTC)
Sources
Environment Agency (samples & classification), South West Water (overflows), EA EDM (annual spills), Open-Meteo (rainfall & tide). Full list on about.
Confidence
High — official classification, 9 outfalls monitored within 5 km.
Risk model
v0.4
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Sample timeline (JSON) · All beaches (CSV)
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