Gwynver water quality

AMBER

designated bathing water · · South West Water

Gwynver is a designated bathing water in Cornwall, currently rated AMBER for swimming — A storm overflow discharged within 5 km in the last 48 hours. Falling tide may draw discharge along the shore. Its latest Environment Agency classification is excellent (2025), and 233 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?

Take care

A storm overflow discharged within 5 km in the last 48 hours. 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: AMBER A storm overflow discharged within 5 km in the last 48 hours. Falling tide may draw discharge along the shore.

Active overflows nearby: 0
Recent overflows (48h): 5
Rainfall (48h): 20.3 mm

Official EA classification

excellent (2025)

Latest official sample

2026-08-18 — E.coli 10, enterococci 10 cfu/100ml

Latest independent sample

None published

Pollution & environment data

20.3 mm

Rainfall 48h

41.0 mm

Rainfall 7d

Outfalls within 5 km

233

Spills (2025, official)

Spills 2026 so far (live)

Spills last 30d

falling 0.97m

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)

spill, 8 min2026-08-27 · ~3.5 km
spill, 36 min2026-08-27 · ~3.4 km
spill, 16 min2026-08-27 · ~4.4 km
spill, 36 min2026-06-08 · ~3.4 km
spill, 36 min2026-06-08 · ~3.4 km
spill, 2 min2026-06-01 · ~4.5 km
spill, 2 min2026-06-01 · ~4.5 km

Full spill history near Gwynver

Download CSV

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

12 discharge events

Start	End	Outfall	Distance
2026-08-27 01:45	2026-08-27 02:00	LOCAL STREAM (S)	~4.4 km
2026-08-27 01:45	2026-08-27 02:15	ATLANTIC / PORTH NANVEN STREAM	~3.4 km
2026-08-27 01:28	2026-08-27 01:36	ATLANTIC / PORTH NANVEN STREAM	~3.5 km
2026-08-27 01:22	2026-08-27 01:58	ATLANTIC / PORTH NANVEN STREAM	~3.4 km
2026-08-27 01:22	2026-08-27 01:38	LOCAL STREAM (S)	~4.4 km
2026-06-08 03:42	2026-06-08 04:18	ATLANTIC / PORTH NANVEN STREAM	~3.4 km
2026-06-01 08:40	2026-06-01 08:42	ATLANTIC OCEAN	~4.5 km
2026-05-12 05:53	2026-05-12 06:05	ATLANTIC OCEAN,OFF SENNEN COVE	~1.7 km
2026-05-01 10:16	2026-05-01 10:17	ATLANTIC / PORTH NANVEN STREAM	~3.5 km
2026-05-01 09:48	2026-05-01 09:49	LOCAL STREAM (S)	~4.4 km
2026-04-28 09:48	2026-04-28 09:51	(S) Tregeseal River	~4.4 km
2026-04-22 11:02	2026-04-22 11:04	ATLANTIC / PORTH NANVEN STREAM	~3.5 km

17 precise spill records (duration & volume)

When	Detail	Distance
2026-08-27 01:28	spill, 8 min	~3.5 km
2026-08-27 01:22	spill, 36 min	~3.4 km
2026-08-27 01:22	spill, 16 min	~4.4 km
2026-06-08 03:42	spill, 36 min	~3.4 km
2026-06-08 03:42	spill, 36 min	~3.4 km
2026-06-01 08:40	spill, 2 min	~4.5 km
2026-06-01 08:40	spill, 2 min	~4.5 km
2026-05-12 05:53	spill, 12 min	~1.7 km
2026-05-12 05:53	spill, 12 min	~1.7 km
2026-05-01 10:16	spill, 1 min	~3.5 km
2026-05-01 10:16	spill, 1 min	~3.5 km
2026-05-01 09:48	spill, 0 min	~4.4 km
2026-05-01 09:48	spill, 0 min	~4.4 km
2026-04-28 09:48	spill, 3 min	~4.4 km
2026-04-28 09:48	spill, 3 min	~4.4 km
2026-04-22 11:02	spill, 1 min	~3.5 km
2026-04-22 11:02	spill, 1 min	~3.5 km

Take action — email SWW / your MP Got ill here? Build a report Report pollution

Water quality — 7-year trend

Water quality in 2026 was broadly level with 2025.

Year	EA classification	Samples	E. coli (geo-mean)	Enterococci (geo-mean)
2019	—	12	10 cfu/100ml	10 cfu/100ml
2021	—	20	10 cfu/100ml	10 cfu/100ml
2022	—	20	10 cfu/100ml	10 cfu/100ml
2023	—	21	10 cfu/100ml	10 cfu/100ml
2024	—	16	10 cfu/100ml	10 cfu/100ml
2025	excellent	10	11 cfu/100ml	11 cfu/100ml
2026	—	8	10 cfu/100ml	10 cfu/100ml

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.

Gwynver — frequently asked questions

Is it safe to swim at Gwynver today?

Gwynver is currently rated AMBER: A storm overflow discharged within 5 km in the last 48 hours. 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 Gwynver?

233 storm-overflow spills were recorded near Gwynver in 2025 (EA Event Duration Monitoring), and 12 spill events have been logged nearby so far this year.

What is Gwynver's bathing water classification?

Gwynver is classified excellent for 2025 by the Environment Agency.

Data & provenance

Last updated: 2 h ago (2026-08-27 15:45 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, 7 outfalls monitored within 5 km.
Risk model: v0.4
Download: Sample timeline (JSON) · All beaches (CSV)

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