Maenporth water quality

AMBER

designated bathing water · · South West Water

Maenporth is a designated bathing water in Cornwall, currently rated AMBER for swimming — A storm overflow discharged within 5 km in the last 48 hours. Incoming/high tide may carry discharge closer to shore. Its latest Environment Agency classification is excellent (2025), and 555 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. Incoming/high tide may carry discharge closer to 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. Incoming/high tide may carry discharge closer to shore.

  • Active overflows nearby: 0
  • Recent overflows (48h): 2
  • Rainfall (48h): 2.3 mm

Official EA classification

excellent (2025)

Latest official sample

2026-08-17 — E.coli 10, enterococci 36 cfu/100ml

Latest independent sample

None published

Pollution & environment data

2.3 mm
Rainfall 48h
4.9 mm
Rainfall 7d
19
Outfalls within 5 km
555
Spills (2025, official)
118
Spills 2026 so far (live)
51
Spills last 30d
rising 1.30m
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 Maenporth

Download CSV

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

120 discharge events
StartEndOutfallDistance
2026-08-25 14:472026-08-25 14:48PENRYN RIVER(E)~4.4 km
2026-08-25 06:262026-08-25 06:28PENRYN RIVER(E)~4.4 km
2026-08-24 07:292026-08-24 07:30PENRYN RIVER(E)~4.4 km
2026-08-23 13:472026-08-23 13:54TRIB OF PENRYN RIVER(S)~4.7 km
2026-08-23 01:002026-08-23 01:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-08-22 02:002026-08-22 02:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-08-21 08:232026-08-21 08:24PENRYN RIVER(E)~4.4 km
2026-08-19 04:452026-08-19 05:45PENRYN RIVER(E)~3.9 km
2026-08-19 04:312026-08-19 05:28PENRYN RIVER(E)~3.9 km
2026-08-16 07:072026-08-16 07:08PENRYN RIVER(E)~4.4 km
2026-08-15 19:152026-08-15 21:00PENRYN RIVER (E)~4.4 km
2026-08-15 18:552026-08-15 20:00PENRYN RIVER (E)~4.4 km
2026-08-14 18:302026-08-14 19:45PENRYN RIVER (E)~4.4 km
2026-08-14 18:082026-08-14 19:32PENRYN RIVER (E)~4.4 km
2026-08-14 04:172026-08-14 04:23TRIB OF PENRYN RIVER(S)~4.7 km
2026-08-13 18:002026-08-13 19:00PENRYN RIVER (E)~4.4 km
2026-08-13 17:312026-08-13 18:44PENRYN RIVER (E)~4.4 km
2026-08-12 21:112026-08-12 21:13PENRYN RIVER(E)~4.4 km
2026-08-12 18:402026-08-12 18:44PENRYN RIVER(E)~4.4 km
2026-08-10 14:162026-08-10 14:22PENRYN RIVER(E)~4.4 km
2026-08-09 13:302026-08-09 16:45PENRYN RIVER(E)~4.4 km
2026-08-09 12:002026-08-09 15:45PENRYN RIVER(E)~4.4 km
2026-08-09 10:152026-08-09 10:45PENRYN RIVER(E)~4.4 km
2026-08-09 09:452026-08-09 10:00PENRYN RIVER(E)~4.4 km
2026-08-08 19:272026-08-08 19:31TRIB OF PENRYN RIVER(S)~4.7 km
2026-08-08 18:002026-08-08 18:30PENRYN RIVER(E)~4.4 km
2026-08-08 17:002026-08-08 17:15PENRYN RIVER(E)~4.4 km
2026-08-08 15:452026-08-08 16:45PENRYN RIVER(E)~4.4 km
2026-08-08 08:002026-08-08 08:30PENRYN RIVER(E)~4.4 km
2026-08-08 07:472026-08-08 08:12PENRYN RIVER(E)~4.4 km
2026-08-07 18:302026-08-07 18:45PENRYN RIVER(E)~4.4 km
2026-08-07 18:122026-08-07 18:34PENRYN RIVER(E)~4.4 km
2026-08-07 15:592026-08-07 16:02PENRYN RIVER(E)~4.4 km
2026-08-04 19:522026-08-04 19:55PENRYN RIVER(E)~4.4 km
2026-08-04 19:152026-08-04 20:30PENRYN RIVER(E)~4.4 km
2026-08-04 16:452026-08-04 17:00PENRYN RIVER(E)~4.4 km
2026-08-04 11:452026-08-04 12:45PENRYN RIVER(E)~3.9 km
2026-08-04 11:192026-08-04 12:04PENRYN RIVER(E)~3.9 km
2026-07-30 11:002026-07-30 12:00TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-30 10:272026-07-30 12:00PENRYN RIVER(E)~3.9 km
2026-07-30 10:192026-07-30 10:52TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-30 06:152026-07-30 06:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-30 06:022026-07-30 06:35TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-30 05:152026-07-30 06:00TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-29 00:062026-07-29 00:07TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-28 04:452026-07-28 05:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-28 04:332026-07-28 04:41TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-27 22:152026-07-27 22:17TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-27 21:332026-07-27 22:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-27 17:152026-07-27 18:00TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-27 16:482026-07-27 16:54TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-26 22:092026-07-26 22:13TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-24 21:302026-07-24 21:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-24 21:042026-07-24 21:13TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-23 11:112026-07-23 11:12PENRYN RIVER~4.4 km
2026-07-23 10:152026-07-23 10:45PENRYN RIVER~4.4 km
2026-07-23 03:482026-07-23 03:57TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-22 09:452026-07-22 09:48TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-22 09:302026-07-22 10:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-22 08:072026-07-22 08:19TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-22 03:522026-07-22 03:59TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-22 01:452026-07-22 02:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-22 01:232026-07-22 01:39TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-21 04:002026-07-21 04:02TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-18 20:452026-07-18 23:15PENRYN RIVER (E)~4.4 km
2026-07-18 20:212026-07-18 20:44PENRYN RIVER (E)~4.4 km
2026-07-17 19:452026-07-17 21:15PENRYN RIVER (E)~4.4 km
2026-07-17 19:052026-07-17 20:35PENRYN RIVER (E)~4.4 km
2026-07-17 09:012026-07-17 09:05TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-17 04:152026-07-17 04:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-17 04:022026-07-17 04:33TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 19:282026-07-16 20:02PENRYN RIVER (E)~4.4 km
2026-07-16 18:452026-07-16 20:15PENRYN RIVER (E)~4.4 km
2026-07-16 11:122026-07-16 11:20TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 10:492026-07-16 10:54TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 10:152026-07-16 11:15TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 05:412026-07-16 05:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 05:302026-07-16 06:15TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 04:102026-07-16 04:17TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 03:302026-07-16 04:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 02:302026-07-16 03:00TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-16 00:562026-07-16 01:01TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-15 21:302026-07-15 21:34TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-15 19:452026-07-15 20:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-15 18:152026-07-15 19:15PENRYN RIVER (E)~4.4 km
2026-07-15 17:362026-07-15 19:01PENRYN RIVER (E)~4.4 km
2026-07-14 17:452026-07-14 18:15PENRYN RIVER (E)~4.4 km
2026-07-14 17:132026-07-14 17:47PENRYN RIVER (E)~4.4 km
2026-07-05 15:222026-07-05 15:24PENRYN RIVER~4.4 km
2026-07-03 20:072026-07-03 20:11TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 19:302026-07-03 19:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 18:302026-07-03 18:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 16:302026-07-03 16:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 14:002026-07-03 14:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 13:272026-07-03 13:41TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 10:422026-07-03 10:43TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 10:302026-07-03 10:45TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 09:302026-07-03 09:31TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 09:002026-07-03 09:15TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 05:152026-07-03 07:30TRIB OF PENRYN RIVER(S)~4.7 km
2026-07-03 04:552026-07-03 07:15TRIB OF PENRYN RIVER(S)~4.7 km
2026-06-27 23:482026-06-27 23:56TRIB OF PENRYN RIVER(S)~4.7 km
2026-06-19 23:342026-06-19 23:50THE PENRYN RIVER (E)~4.9 km
2026-06-19 23:242026-06-20 01:21PENRYN RIVER(E)~3.9 km
2026-06-17 19:112026-06-17 19:38PENRYN RIVER (E)~4.4 km
2026-06-08 11:032026-06-08 11:11PENRYN RIVER(E)~4.4 km
2026-06-02 07:382026-06-02 15:35PENRYN RIVER(E)~3.9 km
2026-05-15 10:332026-05-15 10:35THE HELFORD CREEK(E)~4.6 km
2026-05-02 14:042026-05-02 15:19PENRYN RIVER(E)~4.4 km
2026-05-02 13:572026-05-02 15:07PENRYN RIVER~4.4 km
2026-04-22 10:022026-04-22 12:08PENRYN RIVER(E)~3.7 km
2026-03-13 10:282026-03-13 10:29PENRYN RIVER(E)~4.2 km
2026-03-04 10:442026-03-04 10:45PENRYN RIVER~3.9 km
2026-03-02 07:302026-03-02 23:55FALMOUTH BAY/TRIB BICKLAND WAT~1.8 km
2026-02-26 22:072026-02-26 22:23FALMOUTH BAY (E)~2.5 km
2026-02-18 15:572026-02-18 16:33PENRYN RIVER(E)~4.2 km
2026-02-15 13:302026-02-15 13:34PENRYN RIVER(E)~4.5 km
2026-01-20 14:432026-01-20 14:53PENRYN RIVER(E)~4.2 km
2025-11-03 13:252025-11-03 13:27SWANPOOL (S)~2.4 km
2025-02-14 07:332025-02-14 07:36PENRYN RIVER(E)~3.9 km
124 precise spill records (duration & volume)
WhenDetailDistance
2026-08-25 14:47spill, 1 min~4.4 km
2026-08-25 06:26spill, 2 min~4.4 km
2026-08-24 23:11spill, 2 min~4.4 km
2026-08-24 07:29spill, 1 min~4.4 km
2026-08-23 13:47spill, 6 min~4.7 km
2026-08-22 01:43spill, 2 min~4.7 km
2026-08-21 08:23spill, 1 min~4.4 km
2026-08-19 04:31spill, 57 min~3.9 km
2026-08-16 07:07spill, 1 min~4.4 km
2026-08-15 18:55spill, 65 min~4.4 km
2026-08-14 18:08spill, 85 min~4.4 km
2026-08-14 04:17spill, 6 min~4.7 km
2026-08-13 17:31spill, 73 min~4.4 km
2026-08-13 08:56spill, 29 min~4.7 km
2026-08-12 21:11spill, 2 min~4.4 km
2026-08-12 18:40spill, 4 min~4.4 km
2026-08-10 14:16spill, 6 min~4.4 km
2026-08-09 17:56spill, 26 min~4.4 km
2026-08-09 13:30spill, 29 min~4.4 km
2026-08-09 11:37spill, 82 min~4.4 km
2026-08-08 19:27spill, 4 min~4.7 km
2026-08-08 18:04spill, 2 min~4.4 km
2026-08-08 15:35spill, 0 min~4.4 km
2026-08-08 07:47spill, 26 min~4.4 km
2026-08-08 04:10spill, 2 min~4.4 km
2026-08-07 18:12spill, 22 min~4.4 km
2026-08-07 17:19spill, 11 min~4.4 km
2026-08-07 15:59spill, 3 min~4.4 km
2026-08-04 19:52spill, 3 min~4.4 km
2026-08-04 18:34spill, 71 min~4.4 km
2026-08-04 11:19spill, 46 min~3.9 km
2026-07-30 10:27spill, 20 min~3.9 km
2026-07-30 10:19spill, 33 min~4.7 km
2026-07-30 06:02spill, 33 min~4.7 km
2026-07-30 04:54spill, 14 min~4.7 km
2026-07-30 00:18spill, 2 min~4.7 km
2026-07-29 00:06spill, 1 min~4.7 km
2026-07-28 04:33spill, 7 min~4.7 km
2026-07-27 22:15spill, 3 min~4.7 km
2026-07-27 21:33spill, 14 min~4.7 km
2026-07-27 16:48spill, 7 min~4.7 km
2026-07-26 22:09spill, 4 min~4.7 km
2026-07-24 21:04spill, 9 min~4.7 km
2026-07-23 11:11spill, 2 min~4.4 km
2026-07-23 10:08spill, 6 min~4.4 km
2026-07-23 03:48spill, 9 min~4.7 km
2026-07-22 09:45spill, 3 min~4.7 km
2026-07-22 09:27spill, 3 min~4.7 km
2026-07-22 09:00spill, 0 min~4.7 km
2026-07-22 08:07spill, 12 min~4.7 km
2026-07-22 07:43spill, 9 min~4.7 km
2026-07-22 03:52spill, 6 min~4.7 km
2026-07-22 02:47spill, 35 min~4.7 km
2026-07-22 01:23spill, 15 min~4.7 km
2026-07-21 04:00spill, 2 min~4.7 km
2026-07-18 20:21spill, 23 min~4.4 km
2026-07-17 19:05spill, 90 min~4.4 km
2026-07-17 09:01spill, 3 min~4.7 km
2026-07-17 04:02spill, 31 min~4.7 km
2026-07-16 19:28spill, 34 min~4.4 km
2026-07-16 11:12spill, 8 min~4.7 km
2026-07-16 10:49spill, 5 min~4.7 km
2026-07-16 09:53spill, 21 min~4.7 km
2026-07-16 08:45spill, 4 min~4.7 km
2026-07-16 05:41spill, 5 min~4.7 km
2026-07-16 04:49spill, 40 min~4.7 km
2026-07-16 04:10spill, 8 min~4.7 km
2026-07-16 02:53spill, 52 min~4.7 km
2026-07-16 01:57spill, 20 min~4.7 km
2026-07-16 00:56spill, 5 min~4.7 km
2026-07-15 21:30spill, 4 min~4.7 km
2026-07-15 19:34spill, 2 min~4.7 km
2026-07-15 17:36spill, 85 min~4.4 km
2026-07-14 17:13spill, 34 min~4.4 km
2026-07-05 15:22spill, 2 min~4.4 km
2026-07-03 20:07spill, 4 min~4.7 km
2026-07-03 19:40spill, 1 min~4.7 km
2026-07-03 18:36spill, 58 min~4.7 km
2026-07-03 15:52spill, 23 min~4.7 km
2026-07-03 13:27spill, 14 min~4.7 km
2026-07-03 10:42spill, 2 min~4.7 km
2026-07-03 10:00spill, 7 min~4.7 km
2026-07-03 09:30spill, 1 min~4.7 km
2026-07-03 08:32spill, 19 min~4.7 km
2026-07-03 06:43spill, 23 min~4.7 km
2026-07-03 04:55spill, 80 min~4.7 km
2026-06-27 23:48spill, 7 min~4.7 km
2026-06-27 23:48spill, 7 min~4.7 km
2026-06-19 23:34spill, 16 min~4.9 km
2026-06-19 23:34spill, 16 min~4.9 km
2026-06-19 23:24spill, 117 min~3.9 km
2026-06-19 23:24spill, 117 min~3.9 km
2026-06-17 19:11spill, 26 min~4.4 km
2026-06-17 19:11spill, 26 min~4.4 km
2026-06-08 11:03spill, 8 min~4.4 km
2026-06-08 11:03spill, 8 min~4.4 km
2026-06-02 07:38spill, 477 min~3.9 km
2026-06-02 07:38spill, 477 min~3.9 km
2026-05-15 10:33spill, 2 min~4.6 km
2026-05-15 10:33spill, 2 min~4.6 km
2026-05-02 14:04spill, 75 min~4.4 km
2026-05-02 14:04spill, 75 min~4.4 km
2026-05-02 13:57spill, 70 min~4.4 km
2026-05-02 13:57spill, 70 min~4.4 km
2026-04-22 10:02spill, 127 min~3.7 km
2026-04-22 10:02spill, 127 min~3.7 km
2026-03-13 10:28spill, 2 min~4.2 km
2026-03-13 10:28spill, 2 min~4.2 km
2026-03-04 10:44spill, 1 min~3.9 km
2026-03-04 10:44spill, 1 min~3.9 km
2026-03-02 07:30spill, 985 min~1.8 km
2026-03-02 07:30spill, 985 min~1.8 km
2026-02-26 22:07spill, 16 min, ~2 m³~2.5 km
2026-02-26 22:07spill, 16 min, ~2 m³~2.5 km
2026-02-18 15:57spill, 36 min~4.2 km
2026-02-18 15:57spill, 36 min~4.2 km
2026-02-15 13:30spill, 5 min~4.5 km
2026-02-15 13:30spill, 5 min~4.5 km
2026-01-20 14:43spill, 10 min~4.2 km
2026-01-20 14:43spill, 10 min~4.2 km
2025-11-03 13:25spill, 2 min~2.4 km
2025-11-03 13:25spill, 2 min~2.4 km
2025-02-14 07:33spill, 3 min~3.9 km
2025-02-14 07:33spill, 3 min~3.9 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 28% lower than 2025.

YearEA classificationSamplesE. coli (geo-mean)Enterococci (geo-mean)High readings
2019—1223 cfu/100ml24 cfu/100ml1 of 12
2020—345 cfu/100ml46 cfu/100ml1 of 3
2021—2024 cfu/100ml30 cfu/100ml1 of 20
2022—2020 cfu/100ml23 cfu/100ml1 of 20
2023—2018 cfu/100ml12 cfu/100ml0
2024—2021 cfu/100ml25 cfu/100ml1 of 20
2025excellent2014 cfu/100ml12 cfu/100ml0
2026—1110 cfu/100ml14 cfu/100ml0

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.

Maenporth — frequently asked questions

Is it safe to swim at Maenporth today?

Maenporth is currently rated AMBER: A storm overflow discharged within 5 km in the last 48 hours. Incoming/high tide may carry discharge closer to shore. This is guidance only — also check official alerts and use your judgement.

Has there been a sewage spill near Maenporth?

555 storm-overflow spills were recorded near Maenporth in 2025 (EA Event Duration Monitoring), and 118 spill events have been logged nearby so far this year.

What is Maenporth's bathing water classification?

Maenporth is classified excellent for 2025 by the Environment Agency.

Data & provenance

Last updated
35 min ago (2026-08-26 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, 19 outfalls monitored within 5 km.
Risk model
v0.4
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Sample timeline (JSON) · All beaches (CSV)
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