Holywell Bay water quality

GREEN

designated bathing water · · South West Water

Holywell 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 56 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.
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): 1.5 mm

Official EA classification

excellent (2025)

Latest official sample

2026-06-24 — E.coli 10, enterococci 18 cfu/100ml

Latest independent sample

None published

Pollution & environment data

1.5 mm
Rainfall 48h
3.2 mm
Rainfall 7d
5
Outfalls within 5 km
56
Spills (2025, official)
5
Spills 2026 so far (live)
2
Spills last 30d
rising 1.78m
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 Holywell Bay

Download CSV

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

5 discharge events
StartEndOutfallDistance
2026-06-24 11:442026-06-24 11:48STREAM (S)~2.5 km
2026-06-18 02:262026-06-18 04:19TRIB OF PORTH JOKE~1.8 km
2026-05-22 16:312026-05-22 16:36ATLANTIC OCEAN (C)~3.4 km
2026-05-03 13:422026-05-03 14:14RIVER GANNEL (S)~3.0 km
2026-02-01 22:542026-02-01 22:58CRANTOCK BEACH (C)~2.8 km
12 precise spill records (duration & volume)
WhenDetailDistance
2026-06-24 11:44spill, 3 min~2.5 km
2026-06-24 11:44spill, 3 min~2.5 km
2026-06-18 02:26spill, 113 min~1.8 km
2026-06-18 02:26spill, 113 min~1.8 km
2026-05-22 16:31spill, 6 min~3.4 km
2026-05-22 16:31spill, 6 min~3.4 km
2026-05-03 13:42spill, 32 min~3.0 km
2026-05-03 13:42spill, 32 min~3.0 km
2026-03-07 05:37spill, 90 min~0.6 km
2026-03-07 05:37spill, 90 min~0.6 km
2026-02-01 22:54spill, 3 min~2.8 km
2026-02-01 22:54spill, 3 min~2.8 km
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Water quality trend

Holywell Bay — frequently asked questions

Is it safe to swim at Holywell Bay today?

Holywell 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 Holywell Bay?

56 storm-overflow spills were recorded near Holywell Bay in 2025 (EA Event Duration Monitoring), and 5 spill events have been logged nearby so far this year.

What is Holywell Bay's bathing water classification?

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

Data & provenance

Last updated
1 h ago (2026-06-30 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, 5 outfalls monitored within 5 km.
Risk model
v0.3
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Sample timeline (JSON) · All beaches (CSV)
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