Porth water quality

AMBER

designated bathing water · · South West Water

Porth 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 good (2025), and 171 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): 19
Rainfall (48h): 32.4 mm

Official EA classification

good (2025)

Latest official sample

2026-09-25 — E.coli 120, enterococci 36 cfu/100ml

Latest independent sample

None published

Pollution & environment data

32.4 mm

Rainfall 48h

61.9 mm

Rainfall 7d

Outfalls within 5 km

171

Spills (2025, official)

Spills 2026 so far (live)

Spills last 30d

falling 2.55m

Tide now

Recent storm overflows nearby (30 days)

In the news nearby

Why some storm overflow alerts may not mean a spill · 2026-08-25
Hundreds of tourists are falling sick after visiting some of the best beaches in the country , new figures show · 2026-08-08
Mum of girl , 8 , who died of E . coli slams South West Water over sewage spill revelations · 2026-08-20
3 pollution threats deadlier than climate change in Asia · 2026-10-01
West Dorset MP attacks water company over drought crisis · 2026-10-21
South West Water told to fix the leak as it introduces hosepipe ban · 2026-08-07
South West Water wont reduce your bills during the hosepipe ban · 2026-08-07

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

Recent spills near here (precise, SWW)

spill, 112 min2026-10-24 · ~4.0 km
spill, 34 min2026-10-24 · ~1.3 km
spill, 205 min2026-10-24 · ~2.9 km
spill, 2 min2026-10-24 · ~1.3 km
spill, 2 min2026-10-23 · ~1.3 km
spill, 6 min2026-10-23 · ~1.3 km
spill, 119 min2026-10-22 · ~2.9 km
spill, 4 min2026-10-22 · ~1.3 km

Full spill history near Porth

Download CSV

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

69 discharge events

Start	End	Outfall	Distance
2026-10-24 13:16	2026-10-24 15:16	ATLANTIC OCEAN (C)	~4.0 km
2026-10-24 13:01	2026-10-24 16:31	ATLANTIC OCEAN(T)	~2.9 km
2026-10-24 13:01	2026-10-24 13:46	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-24 12:47	2026-10-24 15:01	ATLANTIC OCEAN (C)	~4.0 km
2026-10-24 12:46	2026-10-24 13:20	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-24 12:40	2026-10-24 16:16	ATLANTIC OCEAN(T)	~2.9 km
2026-10-24 00:02	2026-10-24 00:04	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-23 13:00	2026-10-23 13:02	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-23 04:50	2026-10-23 04:56	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-23 00:00	2026-10-23 02:00	ATLANTIC OCEAN(T)	~2.9 km
2026-10-22 23:34	2026-10-23 01:45	ATLANTIC OCEAN(T)	~2.9 km
2026-10-22 20:16	2026-10-22 23:15	ATLANTIC OCEAN(T)	~2.9 km
2026-10-22 20:16	2026-10-22 21:30	ATLANTIC OCEAN (C)	~4.0 km
2026-10-22 20:16	2026-10-22 20:31	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-22 20:04	2026-10-22 20:08	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-22 20:00	2026-10-22 21:13	ATLANTIC OCEAN (C)	~4.0 km
2026-10-22 19:48	2026-10-22 23:00	ATLANTIC OCEAN(T)	~2.9 km
2026-10-22 19:46	2026-10-22 20:01	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-22 16:58	2026-10-22 17:02	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 20:20	2026-10-21 20:22	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 17:04	2026-10-21 17:06	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 12:48	2026-10-21 12:50	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 11:01	2026-10-21 11:17	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 10:48	2026-10-21 10:50	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 08:31	2026-10-21 08:46	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-21 02:15	2026-10-21 02:30	ATLANTIC OCEAN(T)	~2.9 km
2026-10-21 01:58	2026-10-21 02:16	ATLANTIC OCEAN(T)	~2.9 km
2026-10-20 23:45	2026-10-21 00:00	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-17 07:54	2026-10-17 07:56	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-15 22:15	2026-10-16 02:15	ATLANTIC OCEAN(T)	~2.9 km
2026-10-15 21:47	2026-10-16 02:00	ATLANTIC OCEAN(T)	~2.9 km
2026-10-15 21:45	2026-10-15 23:45	ATLANTIC OCEAN (C)	~4.0 km
2026-10-15 21:29	2026-10-15 23:30	ATLANTIC OCEAN (C)	~4.0 km
2026-10-15 21:15	2026-10-15 21:30	RIVER GANNEL (S)	~4.3 km
2026-10-15 21:01	2026-10-15 21:30	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-15 20:51	2026-10-15 21:02	RIVER GANNEL (S)	~4.3 km
2026-10-15 20:46	2026-10-15 21:16	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-01 08:45	2026-10-01 09:00	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-10-01 08:44	2026-10-01 08:46	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-09-30 01:40	2026-09-30 01:46	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-09-29 21:34	2026-09-29 21:46	ATLANTIC OCEAN (C)	~4.0 km
2026-09-29 21:15	2026-09-30 00:30	ATLANTIC OCEAN(T)	~2.9 km
2026-09-29 21:00	2026-09-30 00:13	ATLANTIC OCEAN(T)	~2.9 km
2026-09-29 21:00	2026-09-29 21:45	ATLANTIC OCEAN (C)	~4.0 km
2026-09-29 20:04	2026-09-29 20:10	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-09-29 20:01	2026-09-29 20:30	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-09-15 14:52	2026-09-15 14:58	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-09-08 03:19	2026-09-08 04:18	ATLANTIC OCEAN (C)	~4.0 km
2026-09-08 02:30	2026-09-08 02:30	ATLANTIC OCEAN(T)	~2.9 km
2026-09-08 02:16	2026-09-08 06:28	ATLANTIC OCEAN(T)	~2.9 km
2026-09-07 21:42	2026-09-07 21:46	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-08-30 12:26	2026-08-30 12:30	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-08-29 08:10	2026-08-29 09:33	ATLANTIC OCEAN(T)	~2.9 km
2026-08-29 06:45	2026-08-29 10:15	ATLANTIC OCEAN(T)	~2.9 km
2026-08-29 05:30	2026-08-29 06:30	ATLANTIC OCEAN (C)	~4.0 km
2026-08-29 04:56	2026-08-29 05:58	ATLANTIC OCEAN (C)	~4.0 km
2026-08-29 04:45	2026-08-29 05:30	ATLANTIC OCEAN(T)	~2.9 km
2026-08-29 04:44	2026-08-29 04:48	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-08-29 04:30	2026-08-29 04:45	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-08-27 02:30	2026-08-27 03:45	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-08-27 02:28	2026-08-27 02:34	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-08-19 04:42	2026-08-19 05:15	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-06-19 23:48	2026-06-19 23:58	UNNAMED DITCH,TRENANCE LAKE(S)	~1.3 km
2026-05-22 16:31	2026-05-22 16:36	ATLANTIC OCEAN (C)	~4.0 km
2026-05-03 17:29	2026-05-03 18:59	ATLANTIC OCEAN(T)	~2.9 km
2026-05-03 13:42	2026-05-03 14:14	RIVER GANNEL (S)	~4.3 km
2026-03-03 13:37	2026-03-03 13:50	NEWQUAY BAY (C)	~2.2 km
2026-02-27 21:40	2026-03-06 03:58	STREAM/ATLANTIC OCEAN (S)	~2.5 km
2026-02-01 22:54	2026-02-01 22:58	CRANTOCK BEACH (C)	~4.5 km

67 precise spill records (duration & volume)

When	Detail	Distance
2026-10-24 12:47	spill, 112 min	~4.0 km
2026-10-24 12:46	spill, 34 min	~1.3 km
2026-10-24 12:40	spill, 205 min	~2.9 km
2026-10-24 00:02	spill, 2 min	~1.3 km
2026-10-23 13:00	spill, 2 min	~1.3 km
2026-10-23 04:50	spill, 6 min	~1.3 km
2026-10-22 23:34	spill, 119 min	~2.9 km
2026-10-22 20:04	spill, 4 min	~1.3 km
2026-10-22 20:00	spill, 73 min	~4.0 km
2026-10-22 19:48	spill, 169 min	~2.9 km
2026-10-22 19:38	spill, 4 min	~1.3 km
2026-10-22 16:58	spill, 4 min	~1.3 km
2026-10-21 20:20	spill, 2 min	~1.3 km
2026-10-21 17:04	spill, 2 min	~1.3 km
2026-10-21 16:10	spill, 2 min	~1.3 km
2026-10-21 15:42	spill, 2 min	~1.3 km
2026-10-21 15:24	spill, 2 min	~1.3 km
2026-10-21 12:48	spill, 2 min	~1.3 km
2026-10-21 12:24	spill, 2 min	~1.3 km
2026-10-21 10:48	spill, 2 min	~1.3 km
2026-10-21 09:46	spill, 2 min	~1.3 km
2026-10-21 08:12	spill, 2 min	~1.3 km
2026-10-21 06:40	spill, 2 min	~1.3 km
2026-10-21 01:58	spill, 18 min	~2.9 km
2026-10-20 23:24	spill, 20 min	~1.3 km
2026-10-17 07:54	spill, 2 min	~1.3 km
2026-10-15 21:47	spill, 238 min	~2.9 km
2026-10-15 21:29	spill, 90 min	~4.0 km
2026-10-15 20:51	spill, 12 min	~4.3 km
2026-10-15 20:46	spill, 30 min	~1.3 km
2026-10-01 08:44	spill, 2 min	~1.3 km
2026-10-01 04:48	spill, 10 min	~1.3 km
2026-10-01 04:42	spill, 2 min	~1.3 km
2026-09-30 01:40	spill, 6 min	~1.3 km
2026-09-29 21:34	spill, 12 min	~4.0 km
2026-09-29 21:00	spill, 193 min	~2.9 km
2026-09-29 20:04	spill, 6 min	~1.3 km
2026-09-15 14:52	spill, 6 min	~1.3 km
2026-09-15 13:34	spill, 11 min	~0.3 km
2026-09-08 03:19	spill, 59 min	~4.0 km
2026-09-08 02:16	spill, 253 min	~2.9 km
2026-09-07 21:42	spill, 4 min	~1.3 km
2026-08-30 12:26	spill, 4 min	~1.3 km
2026-08-29 08:10	spill, 84 min	~2.9 km
2026-08-29 04:56	spill, 63 min	~4.0 km
2026-08-29 04:44	spill, 4 min	~1.3 km
2026-08-27 02:28	spill, 6 min	~1.3 km
2026-08-26 22:50	spill, 4 min	~1.3 km
2026-08-19 04:42	spill, 10 min	~1.3 km
2026-06-19 23:48	spill, 10 min	~1.3 km
2026-06-19 23:48	spill, 10 min	~1.3 km
2026-05-22 16:31	spill, 6 min	~4.0 km
2026-05-22 16:31	spill, 6 min	~4.0 km
2026-05-03 17:29	spill, 90 min	~2.9 km
2026-05-03 17:29	spill, 90 min	~2.9 km
2026-05-03 13:42	spill, 32 min	~4.3 km
2026-05-03 13:42	spill, 32 min	~4.3 km
2026-03-03 13:37	spill, 13 min	~2.2 km
2026-03-03 13:37	spill, 13 min	~2.2 km
2026-02-27 21:40	spill, 9018 min	~2.5 km
2026-02-27 21:40	spill, 9018 min	~2.5 km
2026-02-27 18:45	spill, 16 min	~4.7 km
2026-02-27 18:45	spill, 16 min	~4.7 km
2026-02-25 12:14	spill, 6 min	~0.3 km
2026-02-25 12:14	spill, 6 min	~0.3 km
2026-02-01 22:54	spill, 3 min	~4.5 km
2026-02-01 22:54	spill, 3 min	~4.5 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)	High readings
2019	—	12	16 cfu/100ml	20 cfu/100ml	0
2020	—	9	34 cfu/100ml	37 cfu/100ml	1 of 9
2021	—	20	23 cfu/100ml	27 cfu/100ml	1 of 20
2022	—	20	24 cfu/100ml	29 cfu/100ml	1 of 20
2023	—	23	30 cfu/100ml	27 cfu/100ml	2 of 23
2024	—	20	31 cfu/100ml	32 cfu/100ml	2 of 20
2025	good	20	26 cfu/100ml	33 cfu/100ml	3 of 20
2026	—	20	23 cfu/100ml	35 cfu/100ml	2 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.

Porth — frequently asked questions

Is it safe to swim at Porth today?

Porth 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 Porth?

171 storm-overflow spills were recorded near Porth in 2025 (EA Event Duration Monitoring), and 69 spill events have been logged nearby so far this year.

What is Porth's bathing water classification?

Porth is classified good for 2025 by the Environment Agency.

Data & provenance

Last updated: 8 min ago (2026-10-24 16:45 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)

🔗 Embed this beach status on your site

Surf clubs, hotels and councils — paste this into your page to show a live Porth status card:

<iframe src="https://glanmor.owrek.com/embed/porth" width="340" height="180" style="border:0;width:340px;height:180px" title="Porth water quality – Glanmor" loading="lazy"></iframe>