Harlyn Bay water quality

GREEN

designated bathing water · · South West Water

Harlyn Bay is a designated bathing water in Cornwall, currently rated GREEN for swimming — No recent overflow, low rainfall, no high samples. Its latest Environment Agency classification is excellent (2025), and 309 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, low rainfall, no high samples.
South West Water status: Maintenance · since 2026-06-25 20:30
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, low rainfall, no high samples.

  • Active overflows nearby: 0
  • Recent overflows (48h): 0
  • Rainfall (48h): 2.3 mm

Official EA classification

excellent (2025)

Latest official sample

2026-06-22 — E.coli 10, enterococci 10 cfu/100ml

Latest independent sample

None published

Pollution & environment data

2.3 mm
Rainfall 48h
3.2 mm
Rainfall 7d
6
Outfalls within 5 km
309
Spills (2025, official)
6
Spills 2026 so far (live)
5
Spills last 30d
high 1.97m
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 Harlyn Bay

Download CSV

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

6 discharge events
StartEndOutfallDistance
2026-06-25 09:482026-06-25 09:50CAMEL ESTUARY (E)~4.3 km
2026-06-25 09:092026-06-25 09:11CAMEL ESTUARY (E)~4.6 km
2026-06-18 09:032026-06-18 09:08RIVER CAMEL ESTUARY (E)~4.5 km
2026-06-18 08:452026-06-18 08:47TREYARNON STREAM~2.2 km
2026-06-17 07:262026-06-17 07:43MOTHER IVEYS BAY (C)~1.1 km
2026-03-02 14:432026-03-03 01:13TREVONE BAY~1.1 km
14 precise spill records (duration & volume)
WhenDetailDistance
2026-06-25 09:48spill, 2 min~4.3 km
2026-06-25 09:48spill, 2 min~4.3 km
2026-06-25 09:09spill, 2 min~4.6 km
2026-06-25 09:09spill, 2 min~4.6 km
2026-06-18 09:03spill, 5 min~4.5 km
2026-06-18 09:03spill, 5 min~4.5 km
2026-06-18 08:45spill, 2 min~2.2 km
2026-06-18 08:45spill, 2 min~2.2 km
2026-06-17 07:26spill, 17 min~1.1 km
2026-06-17 07:26spill, 17 min~1.1 km
2026-03-03 12:25spill, 10 min~0.2 km
2026-03-03 12:25spill, 10 min~0.2 km
2026-03-02 14:43spill, 630 min~1.1 km
2026-03-02 14:43spill, 630 min~1.1 km
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Water quality trend

Harlyn Bay — frequently asked questions

Is it safe to swim at Harlyn Bay today?

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

Has there been a sewage spill near Harlyn Bay?

309 storm-overflow spills were recorded near Harlyn Bay in 2025 (EA Event Duration Monitoring), and 6 spill events have been logged nearby so far this year.

What is Harlyn Bay's bathing water classification?

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

Data & provenance

Last updated
2 h ago (2026-06-29 14:00 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, 6 outfalls monitored within 5 km.
Risk model
v0.3
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Sample timeline (JSON) · All beaches (CSV)
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