Mawgan Porth water quality
GREENdesignated bathing water · · South West Water
Mawgan Porth 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 37 storm-overflow spills were recorded nearby in 2025. Below: live risk, recent spills, official samples, rainfall, tides and nearby reports.
Current status
Risk: GREEN No recent overflow, low rainfall, no high samples.
- Active overflows nearby: 0
- Recent overflows (48h): 0
- Rainfall (48h): 1.7 mm
Official EA classification
excellent (2025)
Latest official sample
2026-06-22 — E.coli 27, enterococci 10 cfu/100ml
Latest independent sample
None published
Pollution & environment data
Recent storm overflows nearby (30 days)
No spills recorded within 5 km in the last 30 days.
In the news nearby
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- Antibiotic residues in wastewater found to fuel drug resistance : study - Xinhua · 2026-06-09
- South West Water owner admits firm must learn lesson from Devon parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
Storm-overflow spills near here, by year (EDM)
Recent spills near here (precise, SWW)
No precise spill events recorded near here recently.
Full spill history near Mawgan Porth
Download CSVEvery storm-overflow discharge Glanmor has recorded within 5 km of Mawgan Porth, newest first.
2 discharge events
| Start | End | Outfall | Distance |
|---|---|---|---|
| 2026-02-27 21:40 | 2026-03-06 03:58 | STREAM/ATLANTIC OCEAN (S) | ~2.6 km |
| 2026-02-05 09:27 | 2026-02-05 09:30 | RIVER MENALHYL (S) | ~2.8 km |
10 precise spill records (duration & volume)
| When | Detail | Distance |
|---|---|---|
| 2026-03-02 12:55 | spill, 173 min | ~0.3 km |
| 2026-03-02 12:55 | spill, 173 min | ~0.3 km |
| 2026-02-27 21:40 | spill, 9018 min | ~2.6 km |
| 2026-02-27 21:40 | spill, 9018 min | ~2.6 km |
| 2026-02-27 18:45 | spill, 16 min | ~0.4 km |
| 2026-02-27 18:45 | spill, 16 min | ~0.4 km |
| 2026-02-25 12:14 | spill, 6 min | ~4.8 km |
| 2026-02-25 12:14 | spill, 6 min | ~4.8 km |
| 2026-02-05 09:27 | spill, 3 min | ~2.8 km |
| 2026-02-05 09:27 | spill, 3 min | ~2.8 km |
Water quality trend
Mawgan Porth — frequently asked questions
Is it safe to swim at Mawgan Porth today?
Mawgan Porth 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 Mawgan Porth?
37 storm-overflow spills were recorded near Mawgan Porth in 2025 (EA Event Duration Monitoring), and 2 spill events have been logged nearby so far this year.
What is Mawgan Porth's bathing water classification?
Mawgan Porth is classified excellent for 2025 by the Environment Agency.
Data & provenance
- Last updated
- 3 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, 2 outfalls monitored within 5 km.
- Risk model
- v0.3
- Download
- Sample timeline (JSON) · All beaches (CSV)
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