Porthluney water quality

RED

designated bathing water · · South West Water

Porthluney is a designated bathing water in Cornwall, currently rated RED for swimming — Storm overflow discharging within 5 km right now. Falling tide may draw discharge along the shore. Its latest Environment Agency classification is sufficient (2025), and 80 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?
Avoid — pollution risk
Storm overflow discharging within 5 km right now. Falling tide may draw discharge along the shore.
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: RED Storm overflow discharging within 5 km right now. Falling tide may draw discharge along the shore.

  • Active overflows nearby: 2
  • Recent overflows (48h): 2
  • Rainfall (48h): 29.5 mm

Official EA classification

sufficient (2025)

Latest official sample

2026-09-21 — E.coli 64, enterococci 27 cfu/100ml

Latest independent sample

None published

Pollution & environment data

29.5 mm
Rainfall 48h
57.2 mm
Rainfall 7d
4
Outfalls within 5 km
80
Spills (2025, official)
23
Spills 2026 so far (live)
12
Spills last 30d
falling 1.74m
Tide now

Recent storm overflows nearby (30 days)

In the news nearby

No recent local news matched.

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

Recent spills near here (precise, SWW)

Full spill history near Porthluney

Download CSV

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

24 discharge events
StartEndOutfallDistance
2026-10-24 12:01ongoingATLANTIC OCEAN (C)~4.2 km
2026-10-24 11:41ongoingATLANTIC OCEAN (C)~4.2 km
2026-10-23 08:312026-10-23 08:36ATLANTIC OCEAN (C)~4.2 km
2026-10-23 06:452026-10-23 08:46ATLANTIC OCEAN (C)~4.2 km
2026-09-30 01:452026-09-30 02:15ATLANTIC OCEAN (C)~4.2 km
2026-09-30 01:232026-09-30 02:03ATLANTIC OCEAN (C)~4.2 km
2026-09-30 00:152026-09-30 00:30PORTMELLON STREAM(S)~3.0 km
2026-09-30 00:002026-09-30 01:30ATLANTIC OCEAN (C)~4.2 km
2026-09-29 23:472026-09-30 00:14PORTMELLON STREAM(S)~3.0 km
2026-09-29 23:002026-09-29 23:15ATLANTIC OCEAN (C)~4.2 km
2026-09-29 21:152026-09-29 22:00ATLANTIC OCEAN (C)~4.2 km
2026-09-29 21:152026-09-29 21:45PORTMELLON STREAM(S)~3.0 km
2026-09-08 08:192026-09-08 08:26ATLANTIC OCEAN (C)~4.2 km
2026-08-30 15:282026-08-30 15:32ATLANTIC OCEAN (C)~4.2 km
2026-08-30 14:152026-08-30 15:30ATLANTIC OCEAN (C)~4.2 km
2026-08-30 13:452026-08-30 14:15PORTMELLON STREAM(S)~3.0 km
2026-08-30 13:362026-08-30 14:07PORTMELLON STREAM(S)~3.0 km
2026-08-29 09:222026-08-29 09:28ATLANTIC OCEAN (C)~4.2 km
2026-08-29 08:532026-08-29 09:06PORTMELLON STREAM(S)~3.0 km
2026-08-26 23:532026-08-26 23:58PORTMELLON STREAM(S)~3.0 km
2026-06-01 20:022026-06-01 20:10ATLANTIC OCEAN (C)~4.2 km
2026-06-01 19:192026-06-01 19:32PORTMELLON STREAM(S)~3.0 km
2026-05-26 10:582026-05-26 11:05ENGLISH CHANNEL (COASTAL)~4.1 km
2025-11-04 12:332025-11-04 12:34STREAM (S)~4.9 km
24 precise spill records (duration & volume)
WhenDetailDistance
2026-10-24 11:41spill, 229 min~4.2 km
2026-10-23 08:31spill, 5 min~4.2 km
2026-10-23 06:20spill, 85 min~4.2 km
2026-09-30 01:23spill, 41 min~4.2 km
2026-09-29 23:47spill, 27 min~3.0 km
2026-09-29 23:44spill, 16 min~4.2 km
2026-09-29 23:10spill, 2 min~4.2 km
2026-09-29 20:47spill, 25 min~3.0 km
2026-09-08 08:19spill, 6 min~4.2 km
2026-08-30 15:28spill, 4 min~4.2 km
2026-08-30 15:04spill, 9 min~4.2 km
2026-08-30 13:46spill, 58 min~4.2 km
2026-08-30 13:36spill, 32 min~3.0 km
2026-08-29 09:22spill, 6 min~4.2 km
2026-08-29 08:53spill, 13 min~3.0 km
2026-08-26 23:53spill, 5 min~3.0 km
2026-06-01 20:02spill, 8 min~4.2 km
2026-06-01 20:02spill, 8 min~4.2 km
2026-06-01 19:19spill, 13 min~3.0 km
2026-06-01 19:19spill, 13 min~3.0 km
2026-05-26 10:58spill, 7 min~4.1 km
2026-05-26 10:58spill, 7 min~4.1 km
2025-11-04 12:33spill, 2 min~4.9 km
2025-11-04 12:33spill, 2 min~4.9 km
Take action — email SWW / your MPGot ill here? Build a reportReport pollution

Water quality — 7-year trend

Water quality improved in 2026: average E. coli was 52% lower than 2025.

YearEA classificationSamplesE. coli (geo-mean)Enterococci (geo-mean)High readings
2019—1247 cfu/100ml48 cfu/100ml2 of 12
2020—10103 cfu/100ml97 cfu/100ml3 of 10
2021—2035 cfu/100ml41 cfu/100ml4 of 20
2022—2035 cfu/100ml38 cfu/100ml4 of 20
2023—2340 cfu/100ml37 cfu/100ml4 of 23
2024—2031 cfu/100ml22 cfu/100ml1 of 20
2025sufficient2062 cfu/100ml36 cfu/100ml2 of 20
2026—2030 cfu/100ml22 cfu/100ml2 of 20

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.

Porthluney — frequently asked questions

Is it safe to swim at Porthluney today?

Porthluney is currently rated RED: Storm overflow discharging within 5 km right now. Falling tide may draw discharge along the shore. This is guidance only — also check official alerts and use your judgement.

Has there been a sewage spill near Porthluney?

80 storm-overflow spills were recorded near Porthluney in 2025 (EA Event Duration Monitoring), and 23 spill events have been logged nearby so far this year.

What is Porthluney's bathing water classification?

Porthluney is classified sufficient for 2025 by the Environment Agency.

Data & provenance

Last updated
just now (2026-10-24 16:00 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, 4 outfalls monitored within 5 km.
Risk model
v0.4
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Sample timeline (JSON) · All beaches (CSV)
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